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《Journal of Anhui Agricultural Sciences》 2008-07
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Study on the Mechanism of the Influences of Different Cultivation Modes on Soil Permeability

WANG Hong-bin et al (College of Resource and Environmental Science,Jilin Agricultural University,Fostering Base Established by Province and Ministry of State Key Laboratory for Ecological Restoration and Ecosystem Management of Jilin Province,Changchun,Jilin 130118)  
[Objective] The purpose was to discuss the cause and mechanism of influencing water permeability of black soil in the continuously cropping corn strips in Songliao plain.[Method] The production status of the important producing areas of corn in Songliao plain were investigated in detail in the autumn in 2002 and the physical and chemical characters of 46 soil samples collected from the arable layer were analyzed.[Result] The investigation showed that under the current cultivation mode with small four-wheel tractor as the main drive,the interface between arable layer and plow pan in soil profile was "wave type",but that was "flat type" in the corn field plowed annually in the autumn.The configuration simulation experiment revealed that the profile constitution of "flat type" improved the permeability of soil,increased the permeating velocity of soil water and reduced rainwater runoff.The water consumption of arable soil in "wave type" profile was bigger than that in "flat type",especially in the anaphase,and the phenomenon of water deficit was easy to happen. [Conclusion] The current unreasonable cultivation mode was the main reason causing the fertility of black soil in corn strips in Songliao plain to degrade.
【Fund】: 国家沃土工程项目(2006BAD25B05);; “863”计划项目(2006AA10A309);; 国家粮食丰产科技工程“东北平原中部(吉林)春玉米丰产高效技术集成研究与示范”项目
【CateGory Index】: S152.7
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