集水造林通过增加植树带汇流量改善了林地土壤水分环境，从而影响到林分物质生产水平。
Afforestation by water-harvesting improves the soil water environment in forest owing to increase of runoff volume collected in the planting strip, so that the productivity of forests is influenced.
结果表明：①相同的降水量下，微径流系统可使植树带内接纳的水量比对照区增加2 .3～ 2 .6倍。
The result showed that water collected to the tree strip increased by 2.3 to 2.6 folds in the same time in contrast with that in the check.
导出了带无限多个参数的有根平面植树和平面树的色和方程的精确表达式。
The explicit expressions of chromatic sum equations for rooted planted trees and planar trees with infinitive parameters are derived respectively.
导出了带无限多个参数的有根平面植树和平面树的色和方程的精确表达式。
The explicit expressions of chromatic sum equations for rooted planted trees and planar trees with infinitive parameters are derived respectively.
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