Effects of Long-term Fertilization on Soil Properties and Soil Fertility Evaluation of Cunninghamia lanceolata Plantations
To explore the effects of long-term fertilization on the soil properties of Cunninghamia lanceolata plantations in northwest Guangxi and evaluate its soil fertility quality,and to provide theoretical basis for making scientific and reasonable fertilization scheme.Taking the typical C.lanceolata plantations planted in northwest Guangxi in 2015 as the research object,a long-term positioning experiment of no fertilization(CK)and conventional formula fertilization treatment(PF)was set up,continuous fertilization was conducted from 2015 to 2019,and soil samples were collected for analysis in 2018 and 2020.The results showed that long-term fertilization significantly increased the contents of soil organic matter,total nitrogen,total phosphorus,total potassium,available copper,zinc,iron and manganese,but significantly decreased soil pH;After long-term fertilization,the content of available phosphorus and available potassium in soil increased first and then decreased,and reached the peak after 3 years of fertilization.The comprehensive evaluation of principal component analysis and membership function showed that fertilization significantly improved soil fertility quality,but the improvement effect was weakened after 5 years of fertilization.
NETL
NSTL
万方数据
