Study on Soil Nutrient Fertility of Cultivated Land in Laos

• 作者: Bin LIU Guifen CHEN Liping XIE Moryang CHUAYENG Pheng SENGXUA Qizhan TANG Shuyi LIU Yancheng MENG Yanfei HUANG Yuyi HUANG
• 来源期刊: 农业生物技术:英文版
• 学科: 经济
• 关键词: Cultivated land Soil available nutrients Nutrient content Laos
• 年，卷（期）: 2020,（3）
• 页码范围: 90-92
• 页数: 3页
• 分类号: F42

摘要

[Objectives] This study was conducted to explore the differences in soil nutrient contents of cultivated land in different regions of Laos,and to provide a basis for soil nutrient management and scientific fertilization in Laos. [Methods] By collecting 166 samples of the 0-20 cm cultivated soil layer from farmland in the farming areas of Luang Namtha Province in the northern part of Laos and Vientiane Province in the middle of the country,the contents of soil organic matter,total nitrogen,available phosphorus,available potassium,available calcium and available magnesium were analyzed,so as to evaluate the current status of soil nutrient fertility and explore the differences in soil nutrient contents of regional cultivated land. [Results] The soil organic matter was relatively abundant,the total nitrogen and available potassium contents were at the lower-middle level,and the available phosphorus,available calcium and available magnesium were insufficient or extremely insufficient. The soil nutrient contents of cultivated land were different in different regions. [Conclusions] It is suggested that lime or other alkaline fertilizers should be applied on the farmland with acid soil,and nitrogen,phosphorus,and potassium fertilizers should be added at the same time to improve soil nutrient fertility.