Abstract：Through the investigation on the structure and ecological benefits of shelter-belt on farmland in Ningxia and the analysis of comprehensive weight index, that the important roles played by large net, multi-shelter belt and mixed multi-tree-species in the construction of protection forests is explained. The results show that the wind protection effect of shelter-belt on farmland is better when its porosity reaches 35%～45% and its characters determine the law of variation of wind speed. By the redistribution of solar radiation, shelter-belt on farmland has prominent temperature effects on the surface of the soil and plant, which can prevent the crop from heating. Shelter-belt for farmland can increase air relative humidity and soil moisture. The mechanism is related to its wind control function.
收稿日期: 2004-05-27
引用本文:
查同刚1；孙向阳1；于卫平2；马晖2. 宁夏地区农田防护林结构与小气候效应[J]. 中国水土保持科学, 2004, 2(4): 82-86.
CHA Tong-Gang-；Sun-Xiang-Yang-；Xu-Wei-Beng-；Ma-Hui. Structure and Microclimate Effects of Shelter-belt on Farmland in Ningxia. SSWCC, 2004, 2(4): 82-86.
2004, Vol. 2 
