浠水坡地不同植被类型土壤水分特征研究

Characters of Soil Moisture under Different Vegetation Types in Xishui Slope

为了解不同植被类型土壤水资源的变化规律,选择浠水县荒坡地、农耕地、马尾松林地和农林复合地(桃树+黄花菜)4种典型植被类型为研究对象,通过样地调查与试验测定其土壤水分物理特征变化规律,结果表明:各植被类型土壤容重表现为荒坡地(1.57)>桃树+黄花菜(1.51)>农耕地(1.49)>马尾松(1.45);土壤总孔隙度表现为马尾松(44.97%)>农耕地(43.70%)>桃树+黄花菜(42.82%)>荒坡地(40.52%);0～40cm层土壤饱和蓄水量表现为马尾松(179.89mm)>农耕地(174.80mm)>桃树+黄花菜(171.03mm)>荒坡地(162.07mm)。不同植被类型的0～40cm层土壤饱和蓄水量季节变化规律均表现为9月>6月>3月>12月。

To find out the rule of soil water resources under different vegetation types, four typical vegetations including sloping wildland, crop land, Pinus massoniana Lamb. forestland, agro--forestry land（Amygdalus persica Linn＋Hemerocallis citrina Baroni （H. altissima Stout）） were chosen. It was found that the soil density under different vegetations showed sloping wildland（1.57）〉peach＋daylily（1.51）〉crop land（1.49） forestland （1.45） ; soil total porosity showed forestland （ 44.97 % ） 〉 crop land （ 43.70 % ） 〉 peach ＋ daylily （42.82%） 〉 sloping wildland （40. 52%） ; soil total capacity showed forestland （ 179. 89 mm） 〉 crop land （174.80 mm）〉peach＋daylily（171.03 mm）〉sloping wildland（162.07 mm）. The seasonal variation rule of 0-40 cm layer soil total capacity showed September〉June〉March〉December.