JP4966519B2 - Nitrogen fertilizer composition - Google Patents
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- JP4966519B2 JP4966519B2 JP2005205385A JP2005205385A JP4966519B2 JP 4966519 B2 JP4966519 B2 JP 4966519B2 JP 2005205385 A JP2005205385 A JP 2005205385A JP 2005205385 A JP2005205385 A JP 2005205385A JP 4966519 B2 JP4966519 B2 JP 4966519B2
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- nitrogen fertilizer
- fertilizer composition
- calcium
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- 239000000618 nitrogen fertilizer Substances 0.000 title claims description 40
- 239000000203 mixture Substances 0.000 title claims description 31
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims description 21
- 239000000378 calcium silicate Substances 0.000 claims description 13
- 229910052918 calcium silicate Inorganic materials 0.000 claims description 13
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims description 13
- QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 claims description 12
- 229940043430 calcium compound Drugs 0.000 claims description 8
- 150000001674 calcium compounds Chemical class 0.000 claims description 8
- MYFXBBAEXORJNB-UHFFFAOYSA-N calcium cyanamide Chemical compound [Ca+2].[N-]=C=[N-] MYFXBBAEXORJNB-UHFFFAOYSA-N 0.000 claims description 6
- 239000008188 pellet Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 23
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 18
- 239000000126 substance Substances 0.000 description 16
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 13
- 239000000377 silicon dioxide Substances 0.000 description 11
- 229910052681 coesite Inorganic materials 0.000 description 10
- 229910052906 cristobalite Inorganic materials 0.000 description 10
- 235000012239 silicon dioxide Nutrition 0.000 description 10
- 229910052682 stishovite Inorganic materials 0.000 description 10
- 229910052905 tridymite Inorganic materials 0.000 description 10
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 9
- 239000000292 calcium oxide Substances 0.000 description 9
- 235000012255 calcium oxide Nutrition 0.000 description 9
- 229910052593 corundum Inorganic materials 0.000 description 8
- 229910001845 yogo sapphire Inorganic materials 0.000 description 8
- 239000002689 soil Substances 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 6
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 6
- 239000003337 fertilizer Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 239000004202 carbamide Substances 0.000 description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 229910052736 halogen Inorganic materials 0.000 description 3
- 150000002367 halogens Chemical class 0.000 description 3
- 239000003112 inhibitor Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- AMIMRNSIRUDHCM-UHFFFAOYSA-N Isopropylaldehyde Chemical compound CC(C)C=O AMIMRNSIRUDHCM-UHFFFAOYSA-N 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 2
- 235000011130 ammonium sulphate Nutrition 0.000 description 2
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 239000004572 hydraulic lime Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 2
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 1
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 1
- 244000291564 Allium cepa Species 0.000 description 1
- 235000002732 Allium cepa var. cepa Nutrition 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 244000000626 Daucus carota Species 0.000 description 1
- 235000002767 Daucus carota Nutrition 0.000 description 1
- 240000005979 Hordeum vulgare Species 0.000 description 1
- 235000007340 Hordeum vulgare Nutrition 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 244000269722 Thea sinensis Species 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- UFONUKZQWFSQLP-UHFFFAOYSA-N [N].NC#N Chemical compound [N].NC#N UFONUKZQWFSQLP-UHFFFAOYSA-N 0.000 description 1
- PNNCWTXUWKENPE-UHFFFAOYSA-N [N].NC(N)=O Chemical compound [N].NC(N)=O PNNCWTXUWKENPE-UHFFFAOYSA-N 0.000 description 1
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 235000013877 carbamide Nutrition 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- OKGXJRGLYVRVNE-UHFFFAOYSA-N diaminomethylidenethiourea Chemical compound NC(N)=NC(N)=S OKGXJRGLYVRVNE-UHFFFAOYSA-N 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000012010 growth Effects 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 235000014593 oils and fats Nutrition 0.000 description 1
- 239000003895 organic fertilizer Substances 0.000 description 1
- 125000001477 organic nitrogen group Chemical group 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 239000002681 soil colloid Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 235000013616 tea Nutrition 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
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- Fertilizers (AREA)
Description
本発明は、窒素肥料組成物に関する。 The present invention relates to a nitrogen fertilizer composition.
肥料の３要素の一つである窒素は、アンモニア態窒素又はそれが土壌中の微生物によって硝酸化成した硝酸態窒素の形態として根から吸収される。アンモニア態窒素は土壌中で陽イオンとなり、負の荷電を有する土壌コロイドに吸着するので、地下水等で流亡することは少ないが、やがて陰イオンである硝酸態窒素に変化すると流亡しすくなる。アンモニア態窒素としては、例えばアンモニア、アンモニウム塩、尿素態窒素、有機態窒素、シアナミド態窒素由来のアンモニア態窒素等を例示することができる。 Nitrogen, one of the three elements of fertilizer, is absorbed from the roots in the form of ammonia nitrogen or nitrate nitrogen that is nitrated by microorganisms in the soil. Ammonia nitrogen becomes a cation in the soil and adsorbs to negatively charged soil colloids, so it rarely flows away in groundwater or the like, but eventually changes to nitrate nitrogen which is an anion. Examples of the ammonia nitrogen include ammonia, ammonium salt, urea nitrogen, organic nitrogen, ammonia nitrogen derived from cyanamide nitrogen, and the like.
硝酸態窒素の流亡を軽減させ、作物への利用効率を高めるための方法が種々提案されている。たとえば、窒素肥料を合成樹脂、パラフィン類、油脂類、硫黄等で被覆する方法（特許文献１）、硝酸化成菌である微生物の働きを抑える例えばジシアンジアミド、チオ尿素、グアニルチオ尿素等の硝酸化成抑制剤を添加する方法（非特許文献１）、硝酸化成抑制剤と高分子皮膜の組合せ（特許文献２）である。しかし、これらでは今日の一段と高い緩効性の要求を満たすことができない。
本発明の目的は、緩効性を更に高めた窒素肥料組成物を提供することである。 The objective of this invention is providing the nitrogen fertilizer composition which further improved the slow-release property.
本発明は、ジシアンジアミド、水硬性無機物及び窒素肥料を含有してなる窒素肥料組成物である。また、本発明は、ジシアンジアミドを０．３〜３質量％、水硬性カルシウム化合物を３〜３０質量％、窒素肥料を６７〜９６質量％を含有してなることを特徴とする窒素肥料組成物である。水硬性カルシウム化合物が、カルシウムアルミネート、カルシウムシリケート並びにカルシウムアルミネート及び／又はカルシウムシリケートの含有物質から選ばれた１種又は２種以上であることが好ましい。また、いずれの発明にあっても、窒素肥料が石灰窒素を含むことが好ましい。 The present invention is a nitrogen fertilizer composition comprising dicyandiamide, a hydraulic inorganic substance, and nitrogen fertilizer. The present invention also provides a nitrogen fertilizer composition comprising 0.3 to 3% by mass of dicyandiamide, 3 to 30% by mass of a hydraulic calcium compound, and 67 to 96% by mass of nitrogen fertilizer. is there. The hydraulic calcium compound is preferably one or more selected from calcium aluminate, calcium silicate, and calcium aluminate and / or calcium silicate-containing substances. Moreover, in any invention, it is preferable that a nitrogen fertilizer contains lime nitrogen.
本発明によれば、緩効性を更に高めた窒素肥料組成物が提供される。 According to this invention, the nitrogen fertilizer composition which further improved the slow-release property is provided.
ジシアンジアミドは硝酸化成抑制作用を有するものであり、例えばジシアンジアミド粉体、その造粒物等を使用することができる。ジシアンジアミドの窒素肥料組成物中の含有率は０．３〜３質量％が好ましく、０．３質量％未満では硝酸化成抑制作用が小さく、３質量％より多いと作物の生育に障害を与える恐れがある。 Dicyandiamide has a nitrification inhibitory action, and for example, dicyandiamide powder, a granulated product thereof, and the like can be used. The content of dicyandiamide in the nitrogen fertilizer composition is preferably 0.3 to 3% by mass. If it is less than 0.3% by mass, the nitrification inhibition action is small, and if it exceeds 3% by mass, the growth of the crop may be impaired. is there.
水硬性無機物とは、水と接触することによって硬化する無機物のことを意味し、それを例示すれば、例えばカルシウムアルミネート、カルシウムシリケート等の水硬性カルシウム化合物や、更には水硬性石灰、水硬性石膏、高炉水砕スラグなどである。比表面積は、ブレーン粉末度として２０００〜５０００ｃｍ２／ｇであることが好ましい。これらのなかでも、緩効性の点から、水硬性カルシウム化合物が好ましく、特にカルシウムアルミネート、カルシウムシリケート並びにカルシウムアルミネート及び／又はカルシウムシリケートの含有物質から選ばれた１種又は２種以上の水硬性カルシウム化合物であることが好ましい。水硬性無機物の含有率は、土壌中におけるアンモニア態窒素の存在期間の延長作用をより大きくする観点から、窒素肥料組成物中、３〜３０質量％が好ましく、特に５〜２０質量％が好ましい。 The hydraulic inorganic substance means an inorganic substance that is cured by contact with water. For example, hydraulic calcium compounds such as calcium aluminate and calcium silicate, hydraulic lime, hydraulic Gypsum, granulated blast furnace slag, etc. The specific surface area is preferably 2000 to 5000 cm 2 / g in terms of brane fineness. Among these, hydraulic calcium compounds are preferable from the viewpoint of slow-release, and in particular, one or two or more kinds of water selected from calcium aluminate, calcium silicate, and calcium aluminate and / or a substance containing calcium silicate. It is preferably a hard calcium compound. The content of the hydraulic inorganic substance is preferably 3 to 30% by mass, and particularly preferably 5 to 20% by mass in the nitrogen fertilizer composition from the viewpoint of further increasing the action of extending the duration of ammonia nitrogen in the soil.
ここで、カルシウムアルミネートとはＣａＯとＡｌ２Ｏ３を必須成分とする化合物のことである。この両成分の他に、例えばフッ素、塩素等のハロゲン元素、例えばリチウム、ナトリウム等のアルカリ金属元素、例えば鉄等の３価金属などの元素を含有したものであってもよい。また、結晶形態についても制約はなく、非晶質、結晶質、固溶体のいずれであってもよい。カルシウムアルミネートを例示すれば、ＣがＣａＯ、ＡがＡｌ２Ｏ３、Ｘがハロゲン、ＦがＦｅ２Ｏ３を表すとして、Ｃ３Ａ、ＣＡ、Ｃ１２Ａ７、ＣＡ２、ＣＡ６、Ｃ３Ａ３ＣａＳＯ４、Ｃ３Ａ３ＣａＸ２、Ｃ１１Ａ７ＣａＸ２、Ｃ４ＡＦ、更にはこれらにアルカリ金属酸化物が固溶したものなどである。化学組成としては、ＣａＯが３５〜６０質量％、Ａｌ２Ｏ３が４０〜６５質量％を含むものが好ましく、特にＣａＯが３５〜５５質量％、Ａｌ２Ｏ３が４５〜６５質量％を含むものであることが好ましい。カルシウムアルミネートは、例えば石灰石、カーバイド石灰等の石灰質物質と、例えばボーキサイト、アルミナ等のアルミナ質物質との混合原料を熱処理することによって製造することができる。カルシウムアルミネートの典型的な市販品の一例がアルミナセメントであり、本発明における好適例の一つである。 Here, calcium aluminate is a compound containing CaO and Al2O3 as essential components. In addition to these two components, a halogen element such as fluorine and chlorine, an alkali metal element such as lithium and sodium, and an element such as a trivalent metal such as iron may be used. Moreover, there is no restriction | limiting also about a crystal form, Any may be amorphous, crystalline, and a solid solution. As an example of calcium aluminate, C represents CaO, A represents Al 2 O 3, X represents halogen, and F represents Fe 2 O 3. A metal oxide is a solid solution. As a chemical composition, it is preferable that CaO contains 35-60 mass% and Al2O3 contains 40-65 mass%, and it is especially preferable that CaO contains 35-55 mass% and Al2O3 contains 45-65 mass%. Calcium aluminate can be produced by heat-treating a mixed raw material of a calcareous substance such as limestone or carbide lime and an alumina substance such as bauxite or alumina. An example of a typical commercial product of calcium aluminate is alumina cement, which is one of the preferred examples in the present invention.
カルシウムシリケートとはＣａＯとＳｉＯ２を必須成分とする化合物のことである。この両成分の他に、例えばフッ素、塩素等のハロゲン元素、例えばリチウム、ナトリウム等のアルカリ金属元素、例えば鉄等の３価金属などの元素を含有したものであってもよい。また、結晶形態についても制約はなく、非晶質、結晶質、固溶体のいずれであってもよい。カルシウムシリケートを例示すれば、３ＣａＯ・ＳｉＯ２、２ＣａＯ・ＳｉＯ２、２ＣａＯ・Ａｌ２Ｏ３・ＳｉＯ２などである。化学組成としては、ＣａＯを６０〜８０質量％、ＳｉＯ２を２０〜４０質量％含むものが好ましい。カルシウムシリケートは、例えば生石灰、石灰石等の石灰質物質と、例えば珪石、白土等のシリカ質物質との混合粉末を熱処理をすることによって製造することができる。 Calcium silicate is a compound containing CaO and SiO2 as essential components. In addition to these two components, a halogen element such as fluorine and chlorine, an alkali metal element such as lithium and sodium, and an element such as a trivalent metal such as iron may be used. Moreover, there is no restriction | limiting also about a crystal form, Any may be amorphous, crystalline, and a solid solution. Examples of calcium silicate include 3CaO · SiO2, 2CaO · SiO2, 2CaO · Al2O3 · SiO2, and the like. As a chemical composition, what contains 60-80 mass% of CaO and 20-40 mass% of SiO2 is preferable. A calcium silicate can be manufactured by heat-processing the mixed powder of calcareous substances, such as quick lime and limestone, for example, and siliceous substances, such as a silica stone and clay.
カルシウムアルミネート及び／又はカルシウムシリケートの含有物質とは、カルシウムアルミネート及びカルシウムシリケートの少なくとも一方を７０質量％以上含むものであり、それを例示すればポルトランドセメントクリンカーなどである。ポルトランドセメントクリンカーの一例は、３ＣａＯ・ＳｉＯ２が４５〜７０質量％、２ＣａＯ・ＳｉＯ２が８〜２８質量％、３ＣａＯ・Ａｌ２Ｏ３が５〜１３質量％、４ＣａＯ・Ａｌ２Ｏ３・Ｆｅ２Ｏ３が５〜１３質量％である。 The substance containing calcium aluminate and / or calcium silicate contains at least one of calcium aluminate and calcium silicate in an amount of 70% by mass or more, and examples thereof include Portland cement clinker. An example of a Portland cement clinker is 3CaO.SiO2 of 45 to 70% by mass, 2CaO.SiO2 of 8 to 28% by mass, 3CaO.Al2O3 of 5 to 13% by mass, and 4CaO.Al2O3.Fe2O3 of 5 to 13% by mass. .
窒素肥料については特別な制約はなく、例えば窒素質肥料、有機質肥料、複合肥料等の窒素成分を含む肥料が用いられる。具体例をあげれば、例えば石灰窒素、尿素、硫安、塩安、硝安、硝酸石灰、リン安、硝酸ソーダ、硝酸苦土肥料、腐植酸アンモニウム肥料、ウレアホルム、尿素とイソブチルアルデヒドの縮合物、尿素とアセトアルデヒドの縮合物、シュウ酸とアンモニアの縮合物等である。これらの中でも、石灰窒素は最も大きな緩効性作用を示す。窒素肥料の含有率は、緩効性の観点から、窒素肥料組成物中、６７〜９６質量％が好ましく、特に７５〜９０質量％であることが好ましい。 The nitrogen fertilizer is not particularly restricted, and fertilizers containing nitrogen components such as nitrogenous fertilizer, organic fertilizer, and compound fertilizer are used. Specific examples include, for example, lime nitrogen, urea, ammonium sulfate, ammonium sulfate, ammonium nitrate, lime nitrate, sodium phosphate, sodium nitrate, nitrate clay fertilizer, ammonium humate fertilizer, ureaform, condensate of urea and isobutyraldehyde, urea and A condensate of acetaldehyde, a condensate of oxalic acid and ammonia, and the like. Among these, lime nitrogen shows the largest slow-acting action. The content of nitrogen fertilizer is preferably 67 to 96% by mass, and particularly preferably 75 to 90% by mass in the nitrogen fertilizer composition from the viewpoint of slow release.
本発明の窒素肥料組成物は、ジシアンジアミド、水硬性無機物及び窒素肥料を混合することによって製造することができる。施用時の粉塵発生を軽減する観点から、平均粒径が０．５〜１０ｍｍの粒状又はペレット状に造粒することが好ましい。 The nitrogen fertilizer composition of the present invention can be produced by mixing dicyandiamide, a hydraulic inorganic substance, and nitrogen fertilizer. From the viewpoint of reducing dust generation at the time of application, it is preferable to granulate into particles or pellets having an average particle size of 0.5 to 10 mm.
実施例１
ジシアンジアミドを１質量％、カルシウムアルミネート（ブレーン粉末度が４３００ｃｍ２／ｇ、ＣａＯが３４．５質量％、Ａｌ２Ｏ３が４６．８質量％、残部がＳｉＯ２、ＴｉＯ２等）を１０質量％、窒素肥料（石灰窒素：尿素＝２：１（質量比）の混合物）を８９質量％を混合し、押出成型を行ってペレット状の窒素肥料組成物（平均粒径３ｍｍ、平均長さ５ｍｍ）を製造した。
Example 1
1% by mass of dicyandiamide, 10% by mass of calcium aluminate (brane fineness of 4300 cm 2 / g, 34.5% by mass of CaO, 46.8% by mass of Al 2 O 3, balance of SiO 2, TiO 2 etc.), nitrogen fertilizer ( 89% by mass of lime nitrogen: urea = 2: 1 (mass ratio) was mixed, and extrusion molding was performed to produce a pellet-shaped nitrogen fertilizer composition (average particle size 3 mm, average length 5 mm).
実施例２
カルシウムアルミネートとして市販アルミナセメント（ブレーン粉末度３６００ｃｍ２／ｇ、ＣａＯが３８．３質量％、Ａｌ２Ｏ３が５３．２質量％、残部がＳｉＯ２、ＴｉＯ２等）を用いたこと以外は、実施例１と同様にして窒素肥料組成物を製造した。
Example 2
Example 1 with the exception of using commercially available alumina cement (brane fineness 3600 cm 2 / g, CaO 38.3 wt%, Al 2 O 3 53.2 wt%, balance SiO 2, TiO 2 etc.) as the calcium aluminate. Similarly, a nitrogen fertilizer composition was produced.
実施例３
ジシアンジアミドを１質量％、アルミナセメントを２０質量％、窒素肥料を７９質量％混合したこと以外は、実施例２と同様にして窒素肥料組成物を製造した。
Example 3
A nitrogen fertilizer composition was produced in the same manner as in Example 2 except that 1% by mass of dicyandiamide, 20% by mass of alumina cement, and 79% by mass of nitrogen fertilizer were mixed.
実施例４
ジシアンジアミドを０．５質量％、カルシウムアルミネートを１０質量％、窒素肥料８９．５質量％混合したこと以外は、実施例１と同様にして窒素肥料組成物を製造した。
Example 4
A nitrogen fertilizer composition was produced in the same manner as in Example 1 except that 0.5% by mass of dicyandiamide, 10% by mass of calcium aluminate, and 89.5% by mass of nitrogen fertilizer were mixed.
実施例５
カルシウムアルミネートのかわりにカルシウムシリケート含有物質（ブレーン粉末度が２８００ｃｍ２／ｇ、３ＣａＯ・ＳｉＯ２が５０質量％、２ＣａＯ・ＳｉＯ２が２４質量％、３ＣａＯ・Ａｌ２Ｏ３が１１質量％、４ＣａＯ・Ａｌ２Ｏ３・Ｆｅ２Ｏ３が８質量％、残部がＳｉＯ２、ＴｉＯ２等）を用いたこと以外は、実施例１と同様にして窒素肥料組成物を製造した。
Example 5
Instead of calcium aluminate, a calcium silicate-containing substance (brane fineness of 2800 cm 2 / g, 3CaO · SiO2 is 50% by mass, 2CaO · SiO2 is 24% by mass, 3CaO · Al2O3 is 11% by mass, 4CaO · Al2O3 · Fe2O3 is A nitrogen fertilizer composition was produced in the same manner as in Example 1 except that 8% by mass and the balance was SiO2, TiO2, etc. were used.
実施例６
カルシウムアルミネートのかわりに高炉水砕スラグ（ブレーン粉末度２６００ｃｍ２／ｇ）を用いたこと以外は、実施例１と同様にして窒素肥料組成物を製造した。
Example 6
A nitrogen fertilizer composition was produced in the same manner as in Example 1 except that blast furnace granulated slag (brane fineness 2600 cm 2 / g) was used instead of calcium aluminate.
実施例７
カルシウムアルミネートのかわりに水硬性石灰（ブレーン粉末度３７００ｃｍ２／ｇ）を用いたこと以外は、実施例１と同様にして窒素肥料組成物を製造した。
Example 7
A nitrogen fertilizer composition was produced in the same manner as in Example 1 except that hydraulic lime (brane fineness 3700 cm 2 / g) was used instead of calcium aluminate.
比較例１
カルシウムアルミネートのかわりに石英砂（非水硬性無機物、ブレーン粉末度２６００ｃｍ２／ｇ）を用いたこと以外は、実施例１と同様にして窒素肥料組成物を製造した。
Comparative Example 1
A nitrogen fertilizer composition was produced in the same manner as in Example 1 except that quartz sand (non-hydraulic inorganic substance, brane fineness 2600 cm 2 / g) was used instead of calcium aluminate.
比較例２
カルシウムアルミネートを１０質量％、窒素肥料を９０質量％混合したこと以外は、実施例１と同様にして窒素肥料組成物を製造した。
Comparative Example 2
A nitrogen fertilizer composition was produced in the same manner as in Example 1 except that 10% by mass of calcium aluminate and 90% by mass of nitrogen fertilizer were mixed.
以上の窒素肥料組成物について、以下の硝酸化成試験を行った。それらの結果を表１に示す。
［硝酸化成試験］
２５℃の条件下、１５０ｍｌのプラスチック製ビンに最大容水量の６０％水分を含む表層腐植質黒ボク土６０ｇを充填した。つぎに、窒素肥料組成物５０ｍｇをピンセットで土壌のほぼ中央に埋め、アルミニウム箔で蓋をした。その後、プラスチック製ビンを２０℃の恒温漕に入れ、一定時間経過毎に土壌中の無機態窒素を３００ｍｌの１N硫酸カリウムで抽出濾過し、硫酸銀を約０．２％添加し攪拌し塩素イオンを除いた。一晩５℃放置して濾紙５Ｃで濾別した後、硝酸イオン電極を用いて濾液中の硝酸イオンを定量し、硝酸態窒素量を測定した。
About the above nitrogen fertilizer composition, the following nitrification tests were done. The results are shown in Table 1.
[Nitrification test]
Under a condition of 25 ° C., 150 g of a plastic bottle was filled with 60 g of surface humic black soil containing 60% of the maximum water capacity. Next, 50 mg of a nitrogen fertilizer composition was buried in the approximate center of the soil with tweezers and covered with aluminum foil. The plastic bottle is then placed in a constant temperature bath at 20 ° C., and inorganic nitrogen in the soil is extracted and filtered with 300 ml of 1N potassium sulfate after a certain period of time. Was excluded. After leaving overnight at 5 ° C. and filtering with filter paper 5C, the nitrate ion in the filtrate was quantified using a nitrate ion electrode, and the amount of nitrate nitrogen was measured.
表１の実施例と比較例の対比から、本発明の窒素肥料組成物は、土壌中におけるアンモニア態窒素から硝酸態窒素への硝酸化を遅延する効果が大きいことが示された。 From the comparison of the Examples and Comparative Examples in Table 1, it was shown that the nitrogen fertilizer composition of the present invention has a great effect of delaying nitrification from ammonia nitrogen to nitrate nitrogen in the soil.
本発明の窒素肥料組成物は、植物体一般の肥料と用いることができる。本発明の窒素肥料組成物は、硝酸化成を遅延させるため、流亡し易い硝酸態窒素を長期に渡り徐々に発生させて植物体に吸収させることができるので、特に水稲、茶、大麦、にんじん、ねぎ等の好アンモニア性植物の植物体の生育に用いることが望ましい。 The nitrogen fertilizer composition of the present invention can be used as a general fertilizer for plants. Since the nitrogenous fertilizer composition of the present invention delays nitrification, nitrate nitrogen that tends to run away can be gradually generated over a long period of time and absorbed into the plant body, so that especially rice, tea, barley, carrot, It is desirable to use it for the growth of plants of ammoniaphilic plants such as green onions.
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