How Do Soybeans Balance Fertilization
According to the characteristics of soybean requirement fertilizer, rational fertilization is one of the main cultivation measures for high quality and high yield of soybean. Soybean fertilization techniques are as follows: 1. Seed dressing. There are two commonly used seed dressing methods for soybeans. First, nodule powder dressing, that is, 20-30 grams of rhizobium powder per 5 kg of seeds, 250 grams of clear water, and the seeds and the bacteria powder are thoroughly mixed in the pot and dried. Seed sowing; Second, dressing with micro-fertilizer. Before sowing, weigh 5 to 10 grams of ammonium molybdate per 5 kg of seeds. Dissolve ammonium molybdate completely with 250 grams of warm water. Then spray the fertilizer solution on the seeds. Cover with seeds and sow when dry. In the absence of boron or zinc deficiency, 0.05% borax solution or 0.1% zinc sulfate solution can be used for dressing. 2. Reapply base fertilizer. Soybean basal fertilizer is preferably organic fertilizer. Generally, 2000-30 thousand kilograms of quality farmyard manure is used per acre, and a small amount of chemical fertilizer can be used. However, due to tight summer sowing time, soybeans are mostly based on chemical fertilizers. For plots with low soil fertility, 6 to 7 kg of nitrogen should be applied, and phosphorus and potassium should be 10 to 12 kg each. For plots with high fertility, the amount of nitrogen applied should be 4 to 5 kg, and phosphorus and potassium should be 8 to 10 kg each. Tillage after spreading. 3. Skillfully applying fertilizer. Top dressing is divided into two cases. First, the plots that have not been treated with basal fertilizer must be topdressed with fertilizer. Generally, 3 to 4 kg of urea or 10 to 15 kg of ammonium bicarbonate, 20 kg of calcium superphosphate and 10 kg of potassium fertilizer are chased. Nitrogen fertilizer can recover half of each seedling period and early flowering period. Phosphorus and potassium fertilizers should be chased one after another. The second is to apply the basal fertilizer, according to the seedlings topdressing, if found weak and yellow seedlings, can be added to the amount of nitrogen fertilizer to prevent defermenting. Flowering and poding period is the period when soybeans need fertilizer. Therefore, it is necessary to reapply fertilizer once, and 2 to 5 kg of urea and 7 to 8 kg of potassium fertilizer can be recovered per acre, and topdressing is applied about 5 days before flowering. Dental Sterilizer,Podiatry Sterilizer,Dental Sterilization,Dental Sterilization Equipment ZHEJIANG FOMOS MEDICAL TECHNOLOGY CO.,LTD. , https://www.ifomos.com