浙江湖州不同经营类型竹林土壤持水能力比较

对湖州市4种经营类型的竹林土壤蓄水能力进行了研究。结果表明:4种经营类型竹林土壤层最大持水量的变化范围为1 951.68~2 352.47 t/hm²,土壤总孔隙度的变化范围为48.79%~58.68%,其中毛竹材用林和毛竹笋用林之间存在着极显著差异,其余各类型间无显著差异。林地水源涵养能力依次为毛竹材用林>杂竹林(刚竹、淡竹)>早竹林>毛竹笋用林,毛竹材用林和杂竹林的林地持水能力要好于毛竹笋用林和早竹林。各经营类型竹林0~20cm和>20~40cm土层土壤的容重均无显著差异,总孔隙度、最大持水量均表现为上层大于下层,说明竹鞭分布的深浅及人为增施有机肥,影响着竹林土壤的物理性质和持水能力。

Comparison of Soil Water Holding Capacity of Bamboo Forest under Different Management Models in Huzhou? Zhejiang Province

The soil water holding capacity of the bamboo forest under 4 management models in Huzhou city is studied. The results show that the maximum water holding capacity of soil ranges from 1 951.68 t/hm² to 2 352.47 t/hm², and the total porosity of soil in the bamboo forests ranges from 48.79% to 58.68% . There are significant differences between bamboo timber forest and bamboo shoot forest, but there is no significant difference among the 4 forest management models. The water conservation capacity of forest land is in the order of Phyllostachys pubescens timber forest > mixed bamboo forest (Ph. viridis, Ph. nigra var. henonis) > Ph. violascens forest > Ph. pubescens bamboo shoot forest. There is no significant difference in soil bulk density between 0-20 cm and > 20-40 cm depth. The total porosity and maximum water holding capacity are greater in the upper layer than in the lower layer. This indicates that the depth of bamboo rhizome distribution and the artificial application of organic fertilizer have the effect on the physical properties and water holding capacity of bamboo forest soil.