论文部分内容阅读
研究土壤水分的变化对一个地区造林季节的确定;草、灌、乔的合理布局,造林树种的选择,有着不可忽视的作用。在同一地区尽管降水量相同,然而各地形部位允许渗透、含蓄水分的时间和能力不同,地表迳流量各异,从而造成不同立地条件下土壤实际保蓄的含水量差别。为此,对湟水林场不同土壤,相同土壤不同地形部位的水分状况进行了一些研究。
Studying the change of soil moisture to determine the afforestation season in a region; The rational layout of grass, irrigation, and Joe, the choice of afforestation species, can not be ignored. Although the same precipitation in the same area, but the topography allows the infiltration of different parts of the time and capacity of implicit moisture, surface flow rates are different, resulting in soil moisture under different site conditions actually save the water content difference. For this reason, some researches have been carried out on the water status of different soil and same topographical soil in Xushui Forest Farm.