璧山县星火农场荒坡地综合治理生态效益的研究

ECOLOGICAL BENEFITS OF COMPREHENSIVE CONTROL OF SOIL EROSION ON THE BARREN SLOPES AT"SPARK"FARM IN BISHAN COUNTY

本文研究了璧山县星火农场综合治理荒坡地的生态效益。结果表明,在瘦瘠的荒坡地上修筑水平梯地,发展果树,生态效益十分显著。植被盖度达70％以上,截留量4.1mm;地表径流流速减缓1/10,土壤蓄水量增大33mm;树冠下气温较空旷裸地低1～3℃,土温低1～12℃,土壤失水速度低0.5％～6.75％。土壤侵蚀得到控制,田间气候明显改善。

In the drive of com prehensive control of soil erosion at 'Spark' farm in Bishan county, terraced fields were built on the former barren slopes and fruit trees were grown. An analysis of the ecological benefits showed that the vegetation coverage expanded to over 70%, the velocity of land surface run-off was reduced by 10%, soil water increased by 33 mm, the temperature under the tree crown decreased by 1～3℃ as compared to the naked exposed land, soil temperature dropped by 1～12℃ and the rate of water loss in the soil decreased by 0.5%～6.75%. Soil erosion has been brought under control and the microclimate in the field has been greatly improved.