长期施肥对红壤性水稻土理化性质的影响及土壤肥力质量评价

Basic Physical and Chemical Properties and Assessment for Soil Fertility Quality of Paddy Soil under Long-term Fertilization

基于江西进贤红壤性水稻土长期施肥定位试验,研究施肥前后的土壤基本理化性质的变化,并对不同施肥处理进行土壤肥力质量评价。结果表明:(1)长期施肥导致了土壤的p H值下降,不合理施肥使土壤基本性质退化,有机无机肥配施能有效缓解土壤酸化,显著提高土壤有机碳和有效养分含量。(2)运用Fuzzy综合评判法对土壤肥力质量进行等级评定,有机无机肥配施的处理(NPKOM)为二级,其他施肥处理均为三级,其中对照和单施氮肥处理土壤肥力质量有明显降低的趋势。

In order to study the effects of different fertilizations on the basic physical and chemical properties and assessment for soil fertility quality, a long-term fertilization experiment was conducted in paddy soil, Jinxian, Jiangxi province. The results showed as follows：Firstly, the long-term application of fertilizer led to soil acidification and degradation. The NPKOM treatment effectively inhibited the soil acidification and significantly improved the content of SOC and soil available nutrient. Secondly, the NPKOM treatment belonged to 2grade and others were in the 3 grade of the soil fertility quality by use of the Fuzzy comprehensive assessment. Moreover, the quality of CK treatment and single application of N fertilizer treatment had a significantly decreasing trend on soil.