RESEARCH ON COVER CAPACITY OF NO-TILLAGE PRACTICE TO SOIL EROSION AND MICRO-ORGANISM ACTIVITIES IN SOIL

The research was carried out at Dong Cao catchment, Tien Xuan commune, Thach That district, Hanoi capital with the research methodology such as: Carry out experiments in catchment scale, analysis, synthesis and comparison, and interdisciplinary, multidisciplinary research. The results show that: notillage method that uses vegetation cover (DMC) increased soil moisture from 109 to 243% compared to traditional method of cultivation (FC), and reduces soil erosion effectively (1tons compares with 77tons respectively). DMC contributes to increasing soil fertility by not only reducing soil erosion but also increasing the amount of organic matter returned to the soil from 6 to 12%. On the other hand, DMC creates good habitat for max and microorganisms so their diversity and population in the soil are increased considerably, especially earthworm from 20nb in/m2 in FC to 60nb ind/m2 in DMC. The DMC saving 50% in labor costs, as well as helping to increase corn yields, improving economic efficiency for the farmers. Above research results are clear evidence that non-tillage method is the good cultivation approach to reach the sustainable agricultural practice on sloping land.