Function and Application of Organic Fertilizer
At present, of the total nutrient input of farmland fertilization in China, about 1 beat 4 of nitrogen, 1 of 3 of phosphorus, 80% of potassium and more than 90% of trace elements are solved by the application of organic fertilizer, which is an important basis for the sustainable development of modern agriculture. A large number of studies and practices show that organic fertilizer has comprehensive nutrients and long-lasting fertilizer effect. Organic fertilizer not only contains a large number of essential elements and trace elements, but also rich in organic nutrients. Organic fertilizer is the most comprehensive fertilizer. Organic fertilizer can improve soil physical and chemical properties, improve soil fertility and promote the activity of soil microorganisms. Organic fertilizer can be applied on the spot with wide sources and low cost. the application of organic fertilizer can not only increase nutrients, improve soil fertility, improve the utilization rate of chemical fertilizer, but also reduce the amount of chemical fertilizer, thus reducing the cost of fertilization. it is one of the important measures to save cost and increase efficiency in agriculture. In the guiding ideology, the application of organic fertilizer should be emphasized as much as chemical fertilizer, and the two should be applied together to complement each other, so as to achieve a reasonable structure and a balance between supply and demand. In the application method, it is mainly used as base fertilizer, combined with ploughing and ploughing the whole layer. Mature high-quality agricultural fertilizer and plant ash can also be used as topdressing to promote the direct return of crop straw to the field. In terms of fertilizer sources, it is necessary to make full use of human manure and urine, livestock and poultry manure, crop straw, weeds, fallen leaves and all wastes from agricultural production, make full use of plant ash, soil manure and cake fertilizer, and expand the planting area of green manure according to local conditions.
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Organic fertilizer can be used year after year.
The mixed use of organic fertilizer and chemical fertilizer complement each other, but if the compatibility is unreasonable, it will hurt both sides and cause damage. First, the advantages of mixed application of organic fertilizer and chemical fertilizer. 1. Learn from each other's strong points to make up for their weaknesses and improve soil fertility. The nutrient of chemical fertilizer is single, the content is high, the fertilizer effect is fast, but the duration is short; organic fertilizer has complete nutrients and lasting fertilizer effect, which can improve the soil.
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Insect growth regulators for the control of Plutella xylostella
The emergence of Plutella xylostella has seriously affected the growth of crops. Insect growth regulators and other pesticides are selected to completely eliminate Plutella xylostella. One can be sprayed with 10.8% pyridyl ether EC 800kg 1500 times; second, 5% fluorouracil EC 30g 60ml with 30 jin of water; third, 5% methylvitamin saline dispersible granules can be sprayed with 5g with 30jin of water.
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