Long-term non-flooded mulching cultivation influences rice productivity and soil organic carbon
文献类型： 外文期刊
第一作者： Lu, S. H.
作者： Lu, S. H.;Jiang, R. F.;Six, J.;Zhang, F. S.;Lu, S. H.;Six, J.
作者机构：
关键词： Non-flooded mulching cultivation; plastic film; soil organic carbon; water-stable aggregates; straw management; water use
期刊名称：SOIL USE AND MANAGEMENT （ 影响因子：2.95； 五年影响因子：3.109 ）
ISSN： 0266-0032
年卷期： 2012 年 28 卷 4 期
页码：
收录情况： SCI
摘要： A field experiment was conducted for 10 years to examine the long-term effects of non-flooded mulching cultivation on rice yield and soil organic carbon on Chengdu Plain, south-west China. Compared with traditional flooded cultivation (TF), non-flooded plastic film mulching (PM) resulted in a 14% higher average rice (Oryza sativa L.) yield. However, non-flooded straw mulching (SM) decreased the average rice yield by 11% compared with TF. After 10 years, PM led to similar or higher (SM) soil organic carbon (SOC) and total soil N (TN) in the top 5 cm of the soil profile compared with TF. No differences were found among the three cultivation systems in SOC or total N at 512 and 1224 cm soil depths. Small macroaggregates (0.252 mm) were predominant in the top 5 cm of the soil (5863% of whole soil) across the three cultivation systems. However, the proportion of large macroaggregates (>2 mm) from SM and PM was significantly larger than from TF in the top 5 cm of the soil. Non-flooded mulching cultivation led to increased C and N contents in large macroaggregates and mean weight diameter of aggregates in the 05 cm soil depth. This suggests that non-flooded mulching cultivation increased soil aggregation concomitant with soil C stabilization within the improved soil structure.
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