有机培肥对塿土肥力特征的影响

采用超声波分散法和扫描电镜技术对不同培肥条件下塿土有机无机复合状况、结合态腐殖质组成及土壤微形态进行了研究。结果表明:塿土中有80％～90％的有机质与无机组分结合形成有机无机复合体;塿土中结合态腐殖质分布以紧结态(Ⅲ)为主,稳结态(Ⅱ)和松结态(Ⅰ)差异甚小,随肥力提高Ⅰ/Ⅱ+Ⅲ比值增加;不同肥力的土壤微形态差异明显。

The Effects of Organic Enrichment on Behaviors of Lou Soil Fertility

This paper deals with the complex conditions and the combined form humus and micromorphology of Lou soil under the different cultivation measures using ultrasonic vibration and scanning electron microscopy techniques. The results indicated that there was 80 to 90% of organic matter combining with inorganic component to form organo-mineral complexes. The distribution of combined humus in Lou soil is mainly tightly-combines humus( III ),and there is little difference between stable combined humus ( II )and loose combined humus( I ). The ration of I / II + III is increasing with the soil fertility improved, here is an evident difference of soil micromorphology under the different soil fertilities.