中文摘要：

基于野外旱地红壤定位试验,研究改良剂（生物质炭与过氧化钙）对旱地红壤水稳性团聚体及有机碳分布的影响.结果表明,施用生物质炭与过氧化钙后,土壤水稳性大团聚体的含量及团聚体平均重量直径均得到了不同程度的提高;而C1Ca1、C1Ca2、C2Ca1、C2Ca2处理分别提高＞0.25 mm团聚体含量64.46％,75.70％,26.31％和16.06％,其中以C1Ca2（生物质炭758 kg/hm2与过氧化钙121 kg/hm2）处理效果最好.除单施过氧化钙外,其他处理土壤有机碳含量及储量均有不同程度的增加,生物质炭与过氧化钙配施效果优于单施;在各级土壤团聚体中,不同处理团聚体有机碳含量大小顺序大致为C2Ca2＞C2Ca1＞C1Ca2＞C1Ca1＞C2＞C1＞CK＞Ca1＞ Ca2.因此,改良剂能有效改善旱地红壤团聚体稳定性及提高有机碳含量,且配施效果优于单施.

英文摘要：

Based on a field location experiment in upland red soil, the effects of soil amendments （biochar and calcium peroxide） on distribution of water stable aggregates and organic carbon were investigated. The results showed that the application of biochar and calcium peroxide increased the content of soil water stable aggregates and aggregate mean weight diameter to different extent. C1Ca1, C1Ca2, C2Cal and C2Ca2 treatments could increase the content of 〉0.25 mm soil macro-aggregates by 64.46%, 75.70 %, 26.31% and 16.06%, respectively, in which C1Ca2 treatment （biochar 758 kg/hm2 and calcium peroxide 121 kg/hm2） had the best effect. Except for single application of calcium peroxide, other amendment treatments all increased the content and storage of soil organic carbon to different extent. The effect of combined application of biochar and calcium peroxide was better than that of single application of biochar. In all treatments, the content of soil organic carbon in aggregates followed a decreasing order of C2Ca2, C2Cal, C1Ca2, C1Cal, C2, C1, CK, Ca1 and Ca2. Therefore, soil amendments can effectively improve the aggregate stability and increase the content of organic carbon in upland red soil, and the effect of combined application of biochar and calcium peroxide was better than that of single application.