In agricultural production, the rational use of fertilizers is one of the key factors to ensure high yield and high quality of crops. For soybeans, an important food and oil crop, foliar fertilizer application is an efficient and convenient way to supplement nutrients. This article will provide an in-depth explanation of the four main formulation techniques for soybean foliar fertilizers and provide some practical fertilization recommendations.
First of all, urea solution is a common nitrogen fertilizer formulation. Urea, as a highly efficient nitrogen source, can significantly promote leaf growth and protein synthesis in soybeans. The formula is usually 1-2 kg of urea per 50 kg of water, stirred evenly and sprayed. Urea can be rapidly converted into amino acids and proteins in plants, which plays an important role in improving the biomass and nutritional value of soybean.
Secondly, the potassium dihydrogen phosphate solution is rich in phosphorus and potassium, which play a vital role in the growth of soybeans. Phosphorus promotes root development and seed formation, while potassium helps increase soybean resistance to stress, including resistance to pests, diseases and drought. The formula of potassium dihydrogen phosphate is generally to add 200-300 grams of potassium dihydrogen phosphate per 50 kg of water, stir evenly and spray.
In addition, trace element fertilizer is also an important part of soybean foliar fertilizer. Various trace elements required in the growth process of soybean, such as boron, zinc, manganese, copper, etc., although the demand is small, but it has an important impact on the physiological function and yield of plants. Commonly used trace element fertilizers are boric acid, zinc sulfate, manganese sulfate, copper sulfate, etc., the formula is usually to add an appropriate amount of trace element fertilizer per 50 kg of water, generally 10-50 grams, stir evenly and spray.
Finally, compound foliar fertilizer is a fertilizer that fully meets the nutritional needs of soybean growth. It is made up of a mixture of nutrients in a certain proportion, usually including nitrogen, phosphorus, potassium, trace elements and other components. Different brands and models may have different formulations and recommended concentrations, so dilution and spraying should be done as directed in the instructions when using.
There are several precautions to be taken into account when applying foliar fertilizer. First of all, choose to spray in the morning or evening when there is no wind and avoid applying in high temperatures, bright light or rain, as these conditions may affect the absorption and utilization of fertilizer efficiency, and even cause fertilizer waste. Secondly, it is also very important to control the amount and frequency of fertilization. Excessive fertilization not only does not bring higher yields, but may lead to problems such as soil acidification and nutrient imbalance, which can negatively affect the growth of soybeans.
In general, the formulation technology of soybean foliar fertilizer is a scientific and precise agricultural management method, which can effectively improve the yield and quality of soybean through reasonable combination and application of various fertilizers. However, this requires farmers to have certain professional knowledge and practical experience, as well as continuous innovation and technical support from scientific research institutions and enterprises. In the future, we look forward to seeing more efficient, environmentally friendly and adaptable soybean foliar fertilizer products and technologies to make greater contributions to global food security and sustainable agricultural development.