摘要
坡向和坡位对林地土壤水分有一定影响。林分相同时 ,阴坡林地的土壤水分含量高于阳坡。阴坡河北杨林、柠条灌木林和沙棘灌木林的土壤水分含量分别比阳坡高约 2 .5 3%～ 3.2 0 % ,0 .77%～ 1.0 1%和 2 .35 %。坡向和林分相同时 ,坡下部林地的土壤水分含量相当于、略高于或明显高于坡上部和中部。阴向峁坡下部柠条灌木林的土壤水分含量与峁顶、峁坡上部和中部无明显差异 ;东坡和西北坡下部油松林的土壤水分含量比坡上部仅分别高0 .95 % ,1.46 % (4月 )与 1.2 8% ,0 .35 % (6月 ) ;沟坡下部沙棘灌木林的土壤含水量则分别比沟坡上部和中部高14.79%和 7.2 7% (5月 )与 9.2 1%和 5 .42 % (11月 )。林种对土壤水分亦有一定影响。在相同降水量区域 ,5个不同林种之间的土壤水分含量差值为 0 .5 8%～ 2 .77% ;选择适当的造林树种和密度可以改善林地土壤水分状况。
Effects of stand sites and forest types on soil water contents in soil profiles of 2 to 4 meters were studied in artificial forests in the Loess Plateau. The results showed that in comparison with the stands of Populus hopeiensis, Caragana korshinskii, Hippophae rhamnoides on south slope,the soil water contents (%,SWCs) in the same types of stands on north slope were 2.53% to 3.20%,0.77% to 1.01% and 2.35% higher respectively; and that the Caragana korshinskii stand in the lower part of north slope indicated the same SWC as the ones in the middle and upper parts of the slope; the SWCs in Pinus tabulaeformis stands in the lower parts of east slope and northwest slope were 0.95%, 1.46% (in April) and 1.28%, 0.35% (in June) higher respectively than in the ones in the upper parts of the slopes; and that the the SWCs in Hippophae rhamnoides stands in the middle and upper parts of the slope were 14.79%, 7.27% (in May) and 9.21%,5.42% (in Nov.) lower respectively than in the one in the lower part of slope. There was an SWC difference of 2.58% to 2.77% among 5 types of artificial forests. The water conditions can be improved by selecting suitable type of tree species and stand density.
出处
《水土保持学报》
CSCD
北大核心
2001年第6期43-46,共4页
Journal of Soil and Water Conservation
基金
国家"九五"科技攻关项目 ( 96 -0 0 4-0 5 -0 3)
关键词
人工林
土壤水分
林分立地
artificial forest
soil water
stand site
