为了改善北京地区农田土壤结构，提高土壤蓄水保墒能力，提升农田生产能力，增加作物产量，本项目自2009年开始在北京市延庆县保护性耕作试验田开展农田深松效果研究，对比分析了免耕和免耕+深松2种技术模式对土壤容重、含水率、水分入渗率的影响。结果表明，与免耕处理相比，免耕+深松技术模式0~30 cm图土层内，土壤容重降低了约3.4%，稳定入渗率提高了62.5%，在0~100 cm土层内平均质量含水量增加5.9%，因此深松可提高土壤蓄水保墒能力，有助于农作物的生长。
Abstract
In order to improve the farmland soil structure, increase farmland’s productivity, soil moisture capacity and crop yield in Beijing, this project has been carried out since 2009 in conservation tillage farmland in Yanqing, Beijing, to study the effect of subsoiling. A thorough comparative analysis of no-tillage and notillage+subsoiling on soil bulk density, moisture rate, infiltration rate and crop growth and yield was conducted. The results of test indicated that compared with no-tillage, no-tillage+ subsoiling treatment could reduce soil bulk density by 3.4% and increase the stable infiltration rate by 62.5% within 0 to 30 cm soil layer, while the average soil moisture content was increased by 5.9% within 0 to 100 cm soil layer. Therefore the subsoiling could improve the soil water holding capacity, contribute to the growth of crops.
关键词
保护性耕作； 深松； 蓄水； 犁底层
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Key words
conservation tillage; subsoiling; water storage; plough pan
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