Effects of Different Organic Fertilizers on Soil Salinity and Screening of Organic Fertilizers Suitable for Chongming Citrus
[Objective]To analyze soil pH,conductivity and soil ion changes during the effective period of organic fertilizer by conducting in-door culture experiments on different organic fertilizer applications,so as to provide a theoretical basis for the scientific selection of organic fer-tilizer in the facility.[Method]Using indoor constant temperature cultivation at 25℃for 90 days,the changes in 10 indicators of salt base ions,pH,and electrical conductivity in citrus soil under different application levels of three organic fertilizers,earthworm manure,chicken manure,and cow manure were studied.[Result]The application of three organic fertilizers had little effect on soil pH change.At the applica-tion level of 20 g/kg,the conductivity of chicken manure treatment increased by 28%compared with blank treatment,and the conductivity of vermicompost treatment increased by only 0.8%compared with blank treatment.The high fertilization rate of vermicompost only led to the final content of Mg2+ higher than the blank by 3.4%,but did not affect the Na+,Ca2+ and SO2-4 content,the high fertilization rate of chicken ma-nure led to the increase of soil Na+ and K+ content by 47.4%and 188.2%,and the Ca2+ content increased by 6.8%compared with the blank treatment under the high fertilizer application level of cow manure.[Conclusion]The use of vermicompost for citrus organic fertilizer in facili-ties can better slow down salt accumulation.
万方数据
维普
