Fertilizer is the food of plants, fertilization is an important means of agricultural production to ensure high and stable crop yields essential. China is the world's largest producer and consumer of chemical fertilizers, fertilizer use is large, although at a certain time and to a certain extent to improve crop yields, but the soil, water, agricultural products and environmental hazards caused by increasing, such as: soil acidification, slating, nutrient imbalance, groundwater pollution, agricultural products, such as heavy metals and nitrate content exceeds the standard, resulting in a variety of ecological deficit and human disease. Due to the heavy application, indiscriminate application of chemical fertilizers, do not pay attention to the application of organic fertilizers, resulting in the lack of soil organic matter, resulting in a decline in soil fertility, has become an important eye system factors affecting the sustainable development of China's agriculture and crop stability, high yield. According to survey statistics, China's current agricultural arable land about 80% of the area lack of nitrogen, 50% lack of phosphorus, 30% lack of potassium, some soil organic matter less than 1%. And all kinds of organic fertilizer usually contains more than 60% organic matter, nitrogen 2.5% to X, phosphorus 2% or more, but also contains a variety of trace elements, not only a good source of fertilizer, or excellent soil conditioner. Therefore, vigorously promote bio-organic fertilizer is the inevitable way to achieve sustainable development of agricultural science in the future.
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