赣东北红壤试验区土壤养分限制因子研究

Preliminary Study on the Limiting Factors of Soil Nutrients in the Red Loam Region of Northeast Jiangxi

本研究应用土壤养分状况系统研究法对赣东北红壤试验区八种代表性土壤进行了pH、有机质、全氮、全磷、缓效性钾、活性酸以及11种大、中、微量元素速效含量的实验室分析,进行了对磷、钾、硫、铜、锌等元素的吸附试验和温室栽培试验。在掌握土壤供肥能力及其对养分的吸附固定能力基础上,综合评价土壤养分状况,确定盆栽试验不同施肥处理,进一步探明了各种土壤的养分限制因子及其对产量影响的程度。

The organic matter, pi I value, total nitrogen, total phosphorus, slow ?acting potassium and active acids of eight groups of typical soil from the red loam region of northeast Jiangxi were studied by aid of the system of soil nutrient Condition. The quick ?acting Contents of eleven major, secondary and trace elements were analysed in the lab. And adsorption test and culture test in the greenhouse for phosphorus, potassium, sulphur, copper and zine were conducted, this paper evaluated soil nutrient condition comprehensively, arranged the different treatments of fertilizers applied in the pot, realized the limiting factors of Uie different groups and their effects on sorghum yield on the basis of the knowledge of soil fertility and adsorptive fixation of nutrients.