Research on nutrient release characteristics and application effects of new large-grained fertilizer

large-grained fertilizer%ralidity period%large cherry%soil environment

In view of the problems existing in the traditional small particle or powder fertilizer applied in orchards at present,such as low fertilizer utilization rate,unable to mechanized and accurate quantitative fertilization,this study discussed the nutrient release characteristics and application effect of a new super large particle long-term slow-release fertilizer with high efficiency,low cost,environmental friendliness and light and simplified application on cherry,so as to provide technical reference for high-efficiency fertilization of cherry.The field study results showed that the fertilizer effect period of the new large particle fertilizer treatment was about 120 days,which effectively increased the contents of ammonium nitrate nitrogen,available phosphorus and available potassium in the soil,and could meet the growth needs of big cherry.In addition,the root activity of large particle fertilizer treatment was 66.3%and 27.8%higher than that of CK and common fertilizer treatment,respectively.The number of bacteria,actinomycetes and total microorganisms in rhizosphere soil were the highest.At the same time,the treatment of large granular fertilizer significantly reduced the activities of urease,hydroxylamine oxidoreductase,nitrate reductase and nitrite reductase in rhizosphere soil.In addition,the new large particle fertilizer treatment promoted the growth of cherry plants,effectively improved the chlorophyll content of large cherry leaves.Compared with ordinary fertilizer,the yield increased by 4.8%.It indicated that the new large particle long-term fertilizer could promote the growth of fruit trees and increase the yield of cherry by prolonging the nutrient release time,optimizing the soil environment,and improving the root activity of cherry.