JPS6046922B2 - Improvement of coated seed sowing method - Google Patents

Description

[Detailed description of the invention] The present invention relates to a method for sowing coated seeds.

More specifically, the present invention relates to a method of sowing coated seeds after artificially damaging the coat layer during sowing without significantly damaging the coated seeds.

In recent years, coated seeds have become easier to handle than bare seeds in the cultivation of flowers, vegetables, etc., and are used for precision sowing (accurately sowing carefully selected seeds at predetermined intervals and depths). , subjected to mechanical sowing. The use of coated seeds not only saves on the number of seeds sown and reduces thinning work, but also stabilizes the varieties of cultivated crops (improves growth performance), so they are widely used in Europe and America.

Also in Japan, the spread of agricultural machinery is remarkable, and the use of coated seeds is becoming popular because mechanical sowing can save labor. Attempts have been made to coat flower seeds and vegetable seeds, and many studies have been conducted on coating methods for granulating and shaping irregularly shaped seeds, coating compositions, and improvements in coated seed seeding machines. being done.

In order to use coated seeds for mechanical sowing, the coated seeds must have sufficient strength to withstand mechanical use.

However, seeds such as flowers and vegetables each have unique properties, and a uniform coating composition and coating method is not sufficient, and applying a coating to seeds usually causes a delay in germination. That's true. This delay in germination also results in a delay in harvest, and especially for vegetables, in areas where land turnover and utilization rates are high, the stability of production and, ultimately, the stability of income.
It also affects instability and brings about economic instability. For this reason, for seeds such as carrots, onions, lettuce, burdock, and Chinese cabbage, which have weak germination and delayed germination, studies are being conducted to treat coated seeds with germination promoters, hormones, etc. in order to overcome this problem. is the current situation. but,
Because seeds have unique properties, no effective medicine has been found for all varieties.

In order to solve these problems, the present inventors focused on the advantages of using coated seeds, and as a result of intensive study on methods to eliminate growth delays, we sowed coated seeds to an extent that did not affect seed germination. In some cases, he discovered an improved method of sowing by artificially damaging one layer before sowing.

The specific contents of the present invention are shown below.

As the artificial breaking method in the present invention, manual and mechanical/physical methods can be used, but it is sufficient if the seed part of the coated seed can be damaged without significantly damaging it.

This can be done manually by applying external pressure and grinding, but when applying mechanical force to coated seeds from the outside, the present invention can be easily applied by adding a breakage mechanism to the seeding machine. can do.

For example, belt type, roll type, disk type, vacuum seeding type, etc. are known as seeding machines used for sowing coated seeds, but these seeding machines have protrusions, uneven parts, etc. It is practical to incorporate a breakage mechanism so that a mechanical breakage method can be used.

The external force necessary for this breakage can be achieved by applying a force greater than the strength of the coated seed shell (coating layer) portion. According to the method of the present invention, there is no particular restriction on the coating composition of the seeds, and even if the coated seeds have lost their hardness, it is sufficient to apply sufficient external force to break the coated seeds.
Applicable to all coated seeds.

As a result, the advantages of coated seeds, such as precision sowing, savings in the number of sown particles, and labor savings in thinning work, are maintained, while maintaining the germination vigor of untreated seeds.

Next, examples will be shown in detail.

Examples Coated seeds of carrots, onions, and lettuce having the properties shown in Table 1 were grown in the part where the seeds fall from the tip of the coated seed lifting part of a belt-type seeding machine (TP-? type, manufactured by Taki Agricultural Tools). A pair of metal rolls having a plurality of protrusions on the surface was provided as a breakage mechanism, and the coated seeds were passed between the rolls to break the coat layer while mechanical seeding was performed.

The germination test results at this time are shown in Table 1 along with comparative examples (in the case of naked seeds and coated seeds). The germination test was conducted outdoors (
The soil was covered with soil to a depth of 2 cm in each case. As is clear from the examples, it shows the same germination rate as bare seeds, and cultivation without delay in germination is possible.

The present invention can be said to be extremely effective in cases where the germination delay of coated seeds such as carrots, onions, burdock, honeysuckle, celery, tomato, etc. is particularly severe.

Claims (1)

[Claims] 1. A method for sowing coated seeds, which comprises artificially damaging the coat layer during sowing without significantly damaging the coated seeds, and then sowing the coated seeds.