In modern intensive agriculture cultivation, fertilization is not only to obtain crop yield and income, but also to cultivate soil to improve the quality of farmland, to achieve high yield and environment friendly and sustainable development. Therefore, in recent years there has been a focus on organic fertilizer and fertilizer with the application of the trend. Organic fertilizer use the following points to note:
Organic fertilizer has the advantage of containing many types of nutrients, including a large number of trace nutrients, and contains a lot of organic matter, vitamins and other active substances.
Perennial application of organic fertilizer can make soil organic matter to be updated or improved to improve soil physical and chemical properties, significantly improve soil quality. But the disadvantage is that the nutrient content is low, and the nutrient morphology is mainly organic, need to gradually decompose through the soil microorganisms, can be converted into plants can absorb the use of the form, therefore, nutrient supply intensity is low, difficult to meet the needs of high-yielding crops rapid growth period.
In the application, to take into account the types of organic fertilizer, the characteristics of different characteristics, not only with each other with the right amount of fertilizer, such as ternary compound fertilizer, special fertilizer or with fertilizer with the application. In the case of waste from livestock and poultry farming, the amount of such organic fertilizer is very large and grows rapidly with the rapid development of livestock and poultry products. If you do not make great efforts to scientifically treat livestock and poultry manure Application, not only will cause vegetables, fruit trees and tobacco, tea, potatoes and many other economic crops, loss of large quantities of cheap fertilizer resources, but also reduce the yield and quality of such agricultural products, which will cause agricultural environment deterioration, New rural construction.
Therefore, in the production of economic crops, the full development and rational use of manure organic fertilizer source. As the main characteristics of organic manure is the nutrient content is higher than other organic fertilizer, but its carbon and nitrogen ratio (C / N) range is relatively narrow, usually between 6 to 10, for which to add part of the crushed straw composition Mixed with organic fertilizer. Application of excrement organic fertilizer can be part of the alternative to chemical fertilizers, the effect is similar to the use of special crops like cash crops, increased efficiency control of fertilizer, the crop nitrogen and phosphorus nutrients supply, thereby reducing the amount of fertilizer application, improve fertilizer utilization.
In addition to economic crops, but also to correct a tendency, that is, food crops Daejeon production only by chemical fertilizer without organic fertilizer, long this is not only food production is difficult to sustained and stable growth, but also make agricultural non-point source pollution is increasing. In the majority of farmland recommended organic fertilizer application, we must first pay attention to the types of organic fertilizer, sources and ingredients, the field of organic fertilizer to focus on the main straw to the main, with the appropriate chemical nitrogen fertilizer such as field crops for fertilizer, adjust its carbon and nitrogen Ratio, to promote the decomposition of organic matter and soil microbial community activity and optimization. If the field to a large number of application of manure organic fertilizer, not only fertilizer is difficult to guarantee, and the excrement of organic fertilizer on soil organic matter in the field to improve and fertilize little effect, the main role is to promote the organic matter of the cycle and update, therefore, Urine organic fertilizer should be mainly used in the production of cash crops, especially new vegetables, new orchards and so on.
In addition, raw dung can not be applied and applied in an appropriate amount. The practice of controlling the amount of manure, the EU countries have put forward the provisions of the control of the application. In the case of the United Kingdom, the application is set at 170 tonnes (N) / ha. However, in recent years, some parts of China’s vegetable and orchard production, the average amount of manure per acre applied to more than 2 tons, and some vegetable fields up to 10 tons, so blind and generally high manure application, resulting in vegetable Nutrient accumulation and water pollution. As the manure is rich in organic nitrogen, the decomposition of the final product is nitrate, the same water and the environment will produce pollution, manure may also have excessive heavy metals and other issues.
Therefore, China’s high-input intensive economic crop production, should be applied to soil testing and fertilizer technology, while regulating the amount of organic fertilizer and fertilizer. Advocate organic fertilizer and fertilizer with the application. The proportion of the two suitable for the amount of nitrogen to each half is better. For high-yield high-yield cash crops fertilization, pay attention to the control of manure application, which is scientific and reasonable. In today’s increasingly well-developed aquaculture industry, over-output manure should be applied to the field of food crops, which will be conducive to the sustainable development of China’s grain production and reduce the harmful emissions of some of the farmland.
In short, in the crop yield system, the application of organic fertilizer is only reasonable and sustainable, those side by side the concept of fertility is not conducive to high quality and safe production.
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