中国土壤与肥料Issue(8)：43-50,8.DOI:10.11838/sfsc.1673-6257.24120
林芝雅尼河谷设施土壤酸化、次生盐渍化和养分累积状况分析
Analysis of the soil acidification,secondary salinization degree and nutrient accumulation status of facility agriculture in Yani river valley,Linzhi
摘要
Abstract
This study clarified the soil acidification,secondary salinization degree and nutrient accumulation status of facility agriculture in Yani valley,Linzhi,and provided scientific basis for soil remediation and comprehensive nutrient management of facility agriculture in this area.A field survey was conducted on the main cultivation areas of facilities in Yani river valley from 2020 to 2022.Soil surface samples(0-20 cm)and profile samples(0-20,20-40,40-60,60-80,80-100 cm)of the facility soil were collected.Soil acidification,secondary salinization,nutrient content and the accumulation and distribution of nitrogen and phosphorus in soil profiles were analyzed by measuring soil conductivity(EC),pH and main nutrient indexes.The results showed that(1)the soil acidification and secondary salinization were obvious in the Yani river valley area,the pH of Nixi area,Nichi town area,Milin county area and the back mountain of Xizang Agricultural and Animal Husbandry University was significantly lower than that of the control field,and the EC of the four areas were significantly higher than that of the control.The soil acidification of Nixi area and the secondary salinization degree of the Nizhi town area were the most serious.(2)Compared with the control,the contents of soil organic matter,nitrate nitrogen,available phosphorus and available potassium in Yani river valley facilities increased significantly.(3)The soil organic matter content in Yani Valley was at a medium level(20-30 g·kg-1),the nitrate nitrogen content was at a medium level(50-100 mg·kg-1).However,the available phosphorus content and the available potassium content were at a high and higher level(>150 and 200-300 mg·kg-1,respectively).(4)The contents of nitrate nitrogen and available phosphorus in the same soil layer were significantly higher than the control field,and the surface accumulation of nitrate nitrogen existed in the greenhouse soil.There were serious problems of soil degradation in the main agricultural facilities in Yani river valley,such as soil acidification and secondary salinization,soil nutrient accumulation in facilities,nitrogen and phosphorus leaching loss,and there were certain environmental risks.关键词
林芝雅尼河谷/设施农田/酸化/次生盐渍化/土壤养分Key words
Yani river valley,Linzhi/facility farmland/acidification/secondary salinization/soil nutrient引用本文复制引用
杨爽,唐励治,尼玛曲珍..林芝雅尼河谷设施土壤酸化、次生盐渍化和养分累积状况分析[J].中国土壤与肥料,2025,(8):43-50,8.基金项目
西藏自治区教育科学研究项目(xzjykt621033) （xzjykt621033）
西藏自治区农业资源与环境一流本科专业建设项目(YLZY-11) （YLZY-11）
西藏自治区自然基金项目(ZRKX2021000024). （ZRKX2021000024）
