Adjust Organic Fertilizer Measures to Local Conditions
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The application of chemical fertilizers in the orchard has played an important role in improving the yield and satisfying the needs of the people. However, excessive application of chemical fertilizers has also brought about the decline of fruit quality, the deterioration of orchard soil and the increase 
of environmental pollution risk. In this case, “using organic fertilizer instead chemical fertilizer” and “double reduction” is not only the need of China’s apple industry supply side, but also the sustainable development of agriculture.
From the status of apple orchard in China, the function of adding organic fertilizer are: the first is to improve the quality of orchard soil, promote root growth, and improve the utilization rate of fertilizer; the second is to improve the quality of apple; the third is to replace part of the fertilizer nutrient. In addition, there are some difficulties for the application of organic fertilizer. First, there is little organic fertilizer so that the amount of organic fertilizer can not meet the needs of planting. Second, the cost is high. Even though there is enough organic fertilizer, how to put these organic fertilizer to the ground has become a big problem. Now the aging phenomenon of fruit growers is more and more serious and the fertilization machinery is lack which is the another reason for the limit of organic fertilizer application.
Therefore, when we want choose organic fertilizer, we should firstly consider how to improve soil and fruit quality but not blindly pursuit of rapid and complete replacement. The natural grass or artificial grass cultivation should be in Bohai Bay producing areas and the organic fertilizer using should be in the Loess Plateau region. In the choice of organic fertilizer, the first choice is the bio-organic fertilizer which can improve the soil quality as well as the second should be choose is the manure of herbivores 
(cattle, sheep, rabbits, etc.), and finally should be choose is chicken manure.
The effect of “organic fertilizer alternative chemical fertilizer” is not only related to local conditions, but also to the technical application. On the basis of careful implementation of technical points, the farmers need to pay attention to the following questions: First, the choice of organic materials, we must ensure that the organic fertilizer is pollution-free, fully mature, otherwise the fruit trees will be contaminated or damaged; Second, the application period. The autumn base fertilizer is a kind of fertilizer to improve the storage of nutrients, to ensure the growth and development of early spring fruit trees, to improve the fruit rate and the quality; so we should apply organic fertilizer in autumn. Third, the application way, we must use centralized application technology, that is, digging or ditch. Fourth, the application should be used with the formula fertilizer, water and fertilizer integration and other organic combination.
The article is quoted from: http://www.fert.cn/news/2017/09/07/085908824719.shtml
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