RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2008, Vol. 17 >> Issue (1): 152-152.

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FUNCTIONS OF SOIL AND WATER CONSERVATION BY GRASS HEDGEROW INTERCROPPING OF SLOPE ORCHARD IN THREE GORGES RESERVOIR AREA

LIAO Xiaoyong1，2， LUO Chengde2， CHEN Zhijian1， WANG Haiming   

  • Received:1900-01-01 Revised:1900-01-01 Online:2008-01-20

Abstract: The soil loss of slope orchard is a serious problem on both ecoenvironment and sustainable agricultural development in the Three Gorges Reservoir Area.Preventing soil erosion and improving productivity of slope orchard is the main target of grass hedgerow intercropping.Taking traditional orchard pattern as a control，five year's trail systematical study on ecological effects，including runoff and sediment collecting，of grass hedgerow intercropping was carried out.The results showed that this model could effectively reduce soil and water loss of purple soil slope orchard.Especially，the decrease of soil erosion amount is more evident in comparison with traditional orchard pattern—runoff amount decreased by 5871%~6574%，soil erosion amount decreased by 7070%~7792%.Under the typical short duration and high intensity rainfall，grass hedgerow intercropping played an important role in time delaying and postponing process of runoff and sediment yield.Besides，grass hedgerow intercropping could obviously decrease total amount of nutrient loss，so as to keep soil fertility and improve productivity of land and decrease nonpoint pollution.It was proposed that this trial model should be widely extended to contribute greatly to sustainable agricultural development and ecoenvironmental protection in the Three Gorges Reservoir Area.

Key words: the Three Gorges Reservoir Area, grass hedgerow intercropping, soil and water conservation, slope orchard

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