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Characters of infiltration and preferential flow of black soil in Northeast China under different tillage patterns.

LI Wen-feng1,2;ZHANG Xiao-ping1;LIANG Ai-zhen1,2;SHEN Yan1,2;SHI Xiu-huan1,2;LUO Jin-ming1,2;YANG Xue-ming3   

  1. 1Northeast Institute of Geography and Agroecology, Chinese Academy of
    Sciences, Changchun 130012, China;2Graduate University of Chinese Academy of Sciences, Beijing 100049, China;3Greenhouse & Processing Crops Research Centre, Ontario N0R 1G0, Canada
  • Received:2007-11-27 Revised:1900-01-01 Online:2008-07-20 Published:2008-07-20

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Abstract: By using dye tracer and double-ring infiltrometer techniques, the characters of infiltration and preferential flow of black soil under no-tillage (NT) and fall moldboard plow (MP) were compared after six years continuous management. The results showed that the infiltration rate was higher under NT than under MP. When the infiltration reached steady, the infiltration rate and accumulative infiltration capacity under NT were 1.35 and 1.44 times as high as those under MP, respectively. The penetration depth of methylene blue reached a depth of 43 cm in NT soil, being 16 cm deeper than that in MP soil. Comparing with MP soil, NT soil had better development of pore structure and more biological pores, and presented better preferential flow character, which were of importance for water infiltration and soil and water conservation.

Key words: cucumber, soil compaction stress, root growth, root activity, nitrogen metabolism.