不同有机物料及其配施对潮棕壤轻组有机碳的动态影响

用埋袋法研究了潮棕壤中加入单一物料(玉米秸秆,稻草秸秆,苜蓿,鸡粪,猪粪)和混合物料(玉米秸秆-鸡粪-猪粪和苜蓿-鸡粪-猪粪)后土壤中轻组有机碳的一年内动态变化。结果表明:施不同有机物料后,土壤中轻组有机碳与对照相比都有较大幅度提高。随着培养时间的推移,不同处理的土壤中轻组有机碳碳含量都逐渐下降,且其下降趋势与添加物料的C/N比值呈显著的正相关。相关分析表明,施用混合物料处理中轻组有机碳的含量与单一物料处理都呈显著的正相关。

Effects of Different Organic Materials on Light Fraction Organic Carbon of Soil

A nylon mesh bag method was conducted to study the dynamic changes of light fraction organic carbon (LF-OC) in aquic brown earth in seven organic matter treatments, including maize stalk (y), rice straw (d), alfalfa(m), pig manure(z), chook excrement(j), y-j-z mixed (h1), m-j-z mixed(h2). The results showed that the content of LF-OC reached maximum immediately after the addition of organic materials, and then decreased gradually. There was a significant correlation between the decrease tendency and the C/N ratio of each material. Correlation analysis also showed that the content of LF-OC in mixed matter in soil was significant correlated with that of each component.