Tendency to avoid the use of organic fertilizer
Organic fertilizers can provide comprehensive nutrition for crops, promote the reproduction of soil microorganisms, improve soil structure, and increase soil fertility, fertilizer supply, and buffering capacity, which play an important role in increasing production. However, the composition of organic fertilizers is complex and it is particularly important to be reasonable when applying them. Improper application will result in the loss of nutrients, and even the difficulty of water absorption in the roots of crops, burning of roots, and stiff seedlings.
Organic manure should be fully cooked and then some animal manure such as pig cattle bar and manure will be directly applied to the soil without fermentation and decomposition. The unfermented organic manure will be decomposed and fermented by microorganisms in the soil, and the ammonia generated will easily lead to crops. Burning roots, poisoning, and sometimes weeds and spread pests and diseases. Therefore, it is advisable to apply it fully after fermentation, promote the method of constructing a lagoon in the headland of Tanabe, or add water to the compost heap, and seal it with mud so that the temperature reaches 35 to 40°C and after 25 to 30 days Fermentation can be completed, the high temperature method of manure fermentation at 60 °C under conditions, can kill its eggs and weed seeds, use more safe and effective.
It should not be too concentrated or excessively applied. Especially when fertilizing crops in dry land, if organic fertilizers are directly applied between rows or near the roots of crops, the dry soil moisture concentration is too small and the root system is too concentrated around the roots. The physiological loss of water and the formation of reverse osmosis of the crop result in that the crop will not only absorb no nutrients, but will cause the water and nutrients in the root system to infiltrate, causing the crops to grow poorly or appear wilting and lose water and die, resulting in unbalanced soil nutrients. Organic fertilizer should be used as a base fertilizer and evenly mixed in the soil so as to integrate with the soil. In the application of organic fertilizer during the growth period, it is necessary to open the ditch or apply a hole, apply a cover soil, and do not sprinkle on the ground. Leaf vegetables are generally not suitable for high-concentration liquid organic fertilizer for foliar spray.
Sunburn application of large fertilizer losses in some places used to organic fertilizers such as pig cattle pen manure, sun dried in the sun, or applied to dry soil crop topsoil, the result is to let the manure long-term sun and rain, basic nitrogen Volatilization is lost, quick-acting phosphorus and potassium are also lost, and they pollute the environment. In some places where straw is used as an organic fertilizer source, due to inadequate fermentation rot and over-intensive application of rice plants, large amounts of hydrogen sulfide are generated during rot, and more air bubbles emerge, making the rice root blacker. The delay of seedling emergence and the timely remedy will lead to the occurrence of seedlings in the whole field and cause a reduction in production. In case of this kind of situation, it is necessary to immediately drain the drying field and spray the growth regulators such as sodium nitroprusside to promote the growth of the root system, and add 1% potassium dihydrogen phosphate and 1% urea mixed spray. Good to restore normal growth.
The rational use of organic fertilizers such as straw, pig manure, manure and other organic fertilizers has a high content of cellulose (ie, carbon) and a low nitrogen content. If the fertilizer is used excessively, it can easily lead to lack of nitrogen in the early stage of crops and the lack of fresh seedlings. This is the reason why paddy field straw must be supplemented with nitrogen to supplement nitrogen. Therefore, the application of organic manure is not as good as possible. Generally, 1,000 to 1,500 kilograms of fertilizer per acre or 1,000 to 1,500 kilograms of green manure are added to the crop, and an appropriate amount of ammonium bicarbonate or urea is added to adjust the ratio of carbon to nitrogen to meet the requirements of microorganisms. Need to prevent the emergence of microorganisms and crop nitrogen. The sheep manure in organic manure has high nutrient content, rapid decomposition rate, and high fertilizer efficiency. It is necessary to add appropriate amount of swine manure or cow dung at the time of application so as to achieve stable fertilizer effect. The application of phosphate fertilizer in organic fertilizers will help increase the phosphate fertilizer efficiency. The combination of organic fertilizers and bio-fertilizers will also help improve fertilizer efficiency.
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