Technical points of increasing yield of soybean
1. The ecological types of soybean varieties should be properly selected according to the natural conditions of the local soybean producing areas. The podding habits of soybean can be divided into three types: infinite, limited and sub-finite. Zhumadian, where Lao Zhao is located, belongs to the spring and summer soybean area of the Yangtze River valley. Summer cropping is 120ml for 150 days. Varieties with limited podding ability should be planted in this area, or infinite podding varieties may be selected, so that the above phenomenon will occur. Therefore, attention should be paid to the selection of varieties, especially in the areas with high soil fertility and adequate rainfall, it is suitable to plant limited podding varieties.
two。 The fertilization of soybean in this case has the problem of partial application and excessive application of urea. The demand of soybean for nitrogen, phosphorus and potassium nutrition is comprehensive. Especially in high-yield and high-efficiency production, plants should provide relevant nutritional conditions such as phosphorus, potassium, calcium, iron and molybdenum for rhizobium. At the same time, sufficient potassium can promote the transport of photosynthate from soybean to rhizobium; phosphorus plays a role in many aspects in the process of nodule fixation, such as promoting root growth and nodule formation, and promoting the transfer of nitrogen fixed to the shoot.
Therefore, when the soil phosphorus supply is insufficient, the application of phosphate fertilizer can not only increase soybean yield, but also improve soybean quality. Especially in the early 48 days of soybean growth, the accumulation of phosphorus was more than nitrogen, and the demand for phosphorus was more urgent; the peak of potassium uptake of soybean was in the podding stage. Calcium superphosphate is the best phosphate fertilizer for soybean, and the amount of superphosphate per mu is between 20ml and 40kg. It is suitable to use base fertilizer and planting fertilizer.
On the other hand, the nitrogen nutrition level of soybean plants should not be too high. In soybean production, the amount of nitrogen fertilizer should not exceed 5 kg / mu of pure nitrogen, and nitrogen fertilizer can only be used as base fertilizer. In short, the adjustment of fertilization in this case should reduce nitrogen, increase phosphorus and potassium due to soil.
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Secret recipe for increasing soybean production
In order to increase the yield of soybean, in addition to selecting excellent varieties, improving the nitrogen-fixing ability of nitrogen-fixing bacteria and controlling diseases and insect pests, the following four measures can be taken: 1. The specific method is: after the formation of two cotyledons of soybean, all the undeveloped leaves in the upper part are removed. In this way, the double main branch of & ldquo; & rdquo; can be produced. After the formation of the two true leaves, all the upper undeveloped compound leaves are removed to concentrate nutrients on the new main branches, accelerate the individual cell division of the plant, and promote the sturdy stems, luxuriant branches and leaves and pods of soybean.
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Nanometer magnetic fluid for increasing yield and accelerating ripening of soybean
Due to the large temperature change this spring, the closed weeding effect before soybean seedling is poor, the field is small, the phytotoxicity occurs in a large area, the soybean growth is hindered, the root system is poorly developed, the field is seriously stiff, and the growth process is delayed by 7 - 10 days on average. 1, the main performance 1, the new leaf growth is slow, the bottom leaf is yellow, the root rust root is red, and the root rot occurs in a large area at this stage;2, the normal growth field in the field only accounts for about 20% of the total area;3, the single branch is less, less than 20 - 30% or more.
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