1. College of Soil and Water Conservation, Beijing Forestry University, 100083, Beijing; 2.Plant Development Center for Soil and Water Conservation, Ministry of Water Resources, 100038, Beijing: China
Abstract：Yulin Sand-drift Area is one of the most significantly eroded areas on Loess Plateau in Northwest China. However, rational disposition pattern of soil and water conservation plants can effectively reduce sand storms and sediment into the Yellow River and improve the ecological environment. Four disposition patterns of soil and water conservation plants are designed according to different site conditions. The main species of plants used in these patterns include Populus simonii, Salix psammophila, Hippophae rhamnoides, Caragana korshinskii, Sabina vulgaris and other arbors and shrubs. The corresponding pattern for gentle dunes and interdune lowlands is to grow shrubs on the lower windward slope or to grow arbors and shrubs mixed together on every other dune. For sandy hills, pure shrubberies are for dales while mixed forests of arbor and shrub are for ridges. For river beaches and strands which are relatively flat, with small slope, farmland shelterbelts are the most suitable mode. For flood lands with saline-alkali soil, salt-resistant tree and grass species are preferred. The plants should be planted in a mixed waymixed afforestation either by line or by strip at an angle of 30°-45° to the river mainstream direction. It is hoped that this study on disposition patterns of soil and water conservation plants in Yulin Sandy-drift Areas could shed light on disposition pattern design for soil and water conservation vegetation construction of other sandy-drift area facing similar problems.
2011, Vol. 9 
