Insufficient soybean meal will seriously affect the yield and quality of soybeans. The main causes are as follows:
1. Late nutrient deficiency The nutrient consumption of soybeans after flowering is high, and some farmers do not fertilize or apply fertilizer when intercropping soybeans. The soybeans have insufficient nutrients after full bloom, the leaves retreat prematurely, the plants are short, the stems are thin, and the leaves are small. Or the weakness of the same flower cluster is not true. It often occurs in slender, multi-flowering varieties.
2, nutrient imbalance in the fertilizer, or nitrogen fertilization excessive fertilizer, intercropping under shading conditions of carbon assimilation weak, carbon and nitrogen ratio imbalance caused. The performance is higher plants, longer internodes, luxuriant foliage and branches, sparse flower buds, empty pods and semipods, and delayed maturity. It is especially serious in rainy days.
3, long-term drought, serious water shortage After soybean flowering, encountered a long period of drought and drought, so that the soybean leaves wilted, yellow, young quail stopped growing, and even the whole plant died. In the land with shallow ploughing and lack of water, soybean meal is not more serious.
4. Late autumn damage due to late sowing or late-maturing varieties, in the late September to early October, still in the flowering plots, due to autumn wind and autumn rain, the temperature dropped, photosynthetic soybean leaves weakened, and the young larvae developed slowly or stopped. Cold areas often occur.
5. Diseases and Insect Damage Viruses in soybeans in summer and autumn cause leaf shrinkage, misshapen larvae, and soybean borer damage.
6. Incoordination of light and temperature At low altitudes, from mid-July to mid-August, under long-day high-temperature conditions, long days delay the development of soybean grain, while high temperatures promote the rapid development and aging of soybean meal, resulting in more soybeans. Not real.
Measures to prevent soybeans from being misconstrued:
1. According to the climatic characteristics of different regions, select and broadcast suitable soybean varieties to avoid damage and seek profits, and strive for high soybean yield.
2, according to different planting systems and different regions of soybean breeding period light temperature changes, select the appropriate light and temperature eco-type species, such as spring soybeans need to light-sensitive temperature-sensitive, summer soybeans need photosensitive blunt, autumn soybeans need Light and temperature sensitive type.
3. Low-heat areas should actively develop early-maturing spring soybeans or late-maturing mid-summer-soybeans and developing autumn soybeans in low-heat areas of the river valley to avoid long-day high temperatures from mid-July to mid-August, and use from mid-June to mid-August. The relative low temperature in September caused the soybeans to enter into the gutting period and prevent the pods from being unrealistic.
4. Select a limited inflorescence, use the conditions of long and short temperature period, adjust the sowing date so that the growth and development of soybean is in the proper photoperiod period, normally complete the grain birth grain, and avoid stumbling.
5, change the habit of soya bean not fertilize, according to the law of soybean fat, scientific formula fertilization, if the performance of the lack of fertilizer in the middle and late can be suitably sprayed 0.1-0.2% potassium dihydrogen phosphate solution, nutritional supplements, Avoid fat loss and premature aging in the middle and late periods.
6. Strengthen field management and prevent pests and diseases. Watering timely and properly in the drought to meet the water requirement of soybean growth and development.
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