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cje ›› 1994, Vol. ›› Issue (2): 72-73.

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Rhizospheric N-fixation Effect of Whole Stalk Mulching on a Non-Tillaged Corn Farmland

SiQingliang, Ma Yuzhen, ding Yuchuan   

  1. Institute of soil and Fertilixers, Shanxi Academy of Agricultural Sciernces, Taiyuan 030031
  • Received:1992-10-25 Revised:1993-11-17 Online:1994-04-10

Abstract: Under the condition of continental semi-arid climate in Shanxi province,whole stalk mulching on non-tillaged corn farmlands has a favourable effect on the rhizospheric N-fixation and yield increasing.with annual mulching,the N-fixation intensity of corn root system and its rhizosphere at the early vegetative growing stage is respectively 310 and 38.2% higher than that without mulching, and 85.8 and 25.3% higher than that with traditional tillage. Whole stalk mulching can increase the soil moisture content of cultivatedlayer by 2.1-3.0%,organic matter content by 0.1-0.28% and average yield by 57.7%。It also has astronger effect on the veriical distribution of N-fixation intensity in corn rhizosphere.

Key words: nitrogen deposition, soil enzyme activity, Betula luminifera, Rainy Area of West China.