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.
CHA Tong-Gang-;Sun-Xiang-Yang-;Xu-Wei-Beng-;Ma-Hui. Structure and Microclimate Effects of Shelter-belt on Farmland in Ningxia[J]. SSWCC, 2004, 2(4): 82-86.