First, under normal circumstances
1. Organic and inorganic combination. Soil organic matter is an important indicator of the extent of soil fertility. Scientific fertilization must be based on organic fertilizers. The application of organic fertilizers can increase soil organic matter content, improve soil physical, chemical and biological properties, increase soil water retention and fertility, increase soil microbial activity, and promote utilization of chemical fertilizers. Therefore, we must adhere to a variety of forms of organic fertilizer input in order to be able to fertilize fertility and achieve sustainable agricultural development.
2. With a large number of medium and trace elements. The cooperation of various nutrient elements is an important part of scientific fertilization. With the continuous increase of yield, under the intensive and intensive management of cultivated land, it is necessary to further emphasize the coordination of nitrogen, phosphorus, and potassium fertilizers, and supplement the necessary trace elements. In order to obtain high and stable production.
3. The combination of land use and land support, and input and output balance. To make the crop-soil-fertilizer form a virtuous circle of matter and energy, it is necessary to insist on the use of conservation and integration, balance the input and output, and destroy or consume the soil fertility, which means that the agricultural reproduction capacity is reduced.
Second, under drought conditions
1. Split fertilization. One-time fertilization when drought occurs can easily lead to contamination of the ground garden. If heavy rains are encountered after a drought, the applied fertilizers are easily washed away, which not only causes economic losses to farmers, but also pollutes the environment.
2. Deep fertilization material. In the case of drought, the fertilizer is volatile if only the fertilizer is applied to the surface. If the drought is followed by heavy rain, it is also easy to be washed away by rain. Therefore, fertilizers should be applied as far as possible to maintain fertilizer efficiency.
3. Pay attention to potash fertilizer and boron fertilizer. The application of potash fertilizer can make crop leaf stomata smaller, reduce water transpiration loss, and is conducive to drought resistance. In addition, drought is prone to induce boron deficiency in crops, especially in growing peanuts, fruit trees, rapeseed, etc. Boron fertilizer should be applied.
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