珠三角平原区耕地质量综合评价

Comprehensive evaluation of cultivated land quality in the Pearl River Delta Plain

采用土壤肥力综合指数法对珠三角平原区耕地土壤肥力质量进行综合评价,结果表明:研究区土壤有机质、有效磷、全钾和速效钾含量总体上较丰富和丰富,全磷和阳离子交换量(CEC)水平处于中等,全氮和水解性氮含量总体缺乏,土壤肥力综合指数介于0.94~1.09之间,土壤肥力水平等级为Ⅱ级。研究区耕地土壤质量为一般水平,全氮和水解性氮含量缺乏,这是影响研究区域土壤肥力的主要限制因子。对土壤pH、有机质、全氮、水解性氮、全磷、有效磷、全钾、速效钾、CEC和质地10个土壤养分因子进行分析测试。

Soil fertility is the core factor affecting agricultural production.By analyzing and testing 10 soil nutrient factors such as soil pH,organic matter,total nitrogen,hydrolyzable nitrogen,total phosphorus,available phosphorus,total potassium,available potassium,CEC and texture,the soil fertility quality of cultivated land in the Pearl River Delta Plain was comprehensively evaluated by the comprehensive soil fertility index method.The results show that the organic matter,available phosphorus,total potassium and fast-acting potassium are generally rich and abundant,the contents of total phosphorus and CEC are generally medium,the contents of total nitrogen and hydrolyzable nitrogen are generally lacking,and the comprehensive soil fertility index is between 0.94 and 1.09.The level of soil fertility is grade II.The soil quality of the cultivated land in the study area is at the moderate level.The lack of total nitrogen and hydrolyzable nitrogen is the main limiting factor affecting soil fertility in the study area.