How to determine the sowing density of soybean

Soybean planting density and production are closely related. The so-called "dense close planting" refers to the correct handling of the relationship between individuals and groups under the local and specific conditions at that time, so that the groups get the maximum development, the individual is fully developed, and the light energy and land power per unit area are fully utilized; Under the same cultivation conditions, the best economic benefits can be obtained. Therefore, a suitable density is not static, and it cannot simply be said that "few lands should be thin and thin and dense." The following factors should be considered:

(1) Variety: The degree of luxuriance of a plant, such as plant height, number of branches, leaf size, etc., is closely related to the density. Where plant height, branching more, plant type development, large leaf type, planting density should be small; plants dwarf, luxuriant species, or plants are higher, but fewer branches, plant type convergence species should be adopted Larger density.

(2) Fertilizer conditions: Tests have shown that soil fertility and fertilizer levels are closely related to planting density.

(3) Variety types and planting seasons: Generally, the growth period of summer soybeans is long, the plants are tall, and the planting density should be dilute; the spring soybean growth period is short, the autumn soybean growth period is shortest, and the plants are shorter, and suitable for close planting.

The above is the general principle for determining the seeding density. Due to different climates and soil conditions in different regions, different cultivation systems, different management levels and planting varieties, it is impossible to uniformly plant the same density. The planting density of summer soybean in Huanghuai Plain and the Yangtze River basin is generally between 15,000 and 30,000 per acre. Flat and fertile, land with irrigation conditions, between 12,000 and 18,000 Mu seedlings. The soil with moderate fertility and general fertility should be suitable for 23,000-3, 000 plants per mu.

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