红壤坡地不同类型梯田的水土保持效应

应用江西省水土保持生态科技园红壤坡地不同类型梯田小区的观测资料,对不同类型梯田的水土保持效应和柑橘生长情况进行分析。分析结果表明:梯壁植草能大大提高梯田的蓄水保土效益和柑橘产量。从蓄水效益来看,采取“前埂后沟+梯壁植草”方式的水平梯田与外斜式梯田相比,其蓄水效益提高81.4%;从保土效益来看,采取“前埂后沟+梯壁植草”方式的水平梯田与梯壁不植草的对照水平梯田相比,其保土效益提高98.2%;从柑橘产量来看,外斜式梯田与采取标准方式的梯田相比,其产量提高45%;不同类型梯田水土流失量与柑橘产量不一致,这表明作物产量不仅与水土流失量有关,而且与农业技术措施关系密切。

Water and soil conservation effect for different types of terraces on red-soil slope land

Based on the observed data of different types of terraces on red-soil slope land in Soil Conservation Ecological Science & Technology Demonstration Park of Jiangxi Province,an analysis was made on the effect of water and soil conservation and orange growth in different types of terraces.The result shows that grass planting on terrace wall can greatly improve the efficiency of water and soil conservation and orange yield of different types of terraces.Horizontal terrace with grass planted on the wall and mound before but ditch behind can improve the water storage efficiency by 81.4% as compared with outward inclined terrace,it can also improve the effect of soil conservation by 98.2% as compared with terrace without grass planted on the wall,and the outward inclined terrace can improve the orange yield by 45% as compared with the normal terrace.Furthermore,the differences between water and soil erosion and orange yield of different types of terraces show that the crop yield is of close relationships with the amount of water and soil erosion and agricultural technologies to be adopted.