Secret recipe for increasing soybean production
In order to increase soybean production, in addition to selecting excellent varieties, improving the nitrogen fixation ability of nitrogen-fixing bacteria and controlling diseases and insect pests, the following four measures can be taken:
The main results are as follows: 1. The seedlings are coring. 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, there can be "double main branches". After the formation of the two true leaves, all the upper undeveloped compound leaves were removed, which concentrated the nutrients on the new main branches, accelerated the individual cell division of the plant, and promoted the stout stems, luxuriant branches and leaves, pods and dry matter accumulation of soybean.
2. Skillfully applying lime and calcium is one of the indispensable elements for the growth and development of soybean. The application of lime with high calcium content can make soybean stems and leaves grow healthily, increase seed setting rate and increase grain weight. Generally, 25 kilograms of lime is applied per mu. 30kg is used as base fertilizer.
3. Spraying phosphorus and potassium. The application of phosphorus and potassium fertilizer outside the root can promote grain fullness and increase yield. The time of topdressing is generally from flowering to podding stage of soybean, and the method is to apply 100g potassium dihydrogen phosphate per mu and spray evenly with water of 70kg ~ 80kg. If the leaf color is too yellow, 0.5 kg urea per mu is evenly sprayed, once every 5-7 days, 2-3 times in a row.
4. Inhibit breathing. When soybean sees flowers, using sodium bisulfite 4g ~ 5g per mu, spraying 50kg water, spraying once every 7 days, spraying twice ~ 3 times can inhibit the intensity of photorespiration of soybean and reduce the consumption of photosynthates. so as to promote the accumulation of dry matter and increase the yield. However, when adopting this measure, we should pay attention to three points: first, this measure is only applicable to early and medium-maturing soybean varieties and fields that are growing well; second, in the case of drought, it is necessary to water before spraying; third, spraying should be uniform to ensure that all leaves are covered with liquid medicine. If it rains within 12 hours after spraying, make up the spray after the rain stops.
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Three ways to increase soybean production
After emergence of inter-seedling soybean, it is an effective measure to increase yield on the basis of whole seedling and early seedling. The effect of increasing yield mainly depends on the time of interseedling, which should be carried out urgently when two opposite single leaves are unfolded. When the first compound leaf of soybean seedlings is unfolded, choose a sunny day at noon and use animal power or machine to bring wood along the ridge to suppress. When pressing seedlings, we should pay attention to avoid cloudy or sunny mornings, so as not to break the seedlings. Pick the heart at the first or full flowering stage of soybean, remove the top of the main stem by hand, about 2 cm.
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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 120 years and 150 days. Varieties with limited podding ability should be planted in this area, or infinite podding varieties may be selected, so the above phenomenon will occur. Therefore, attention should be paid to the selection of varieties, especially in high soil fertility and rain.
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