Study on the soil water balance of artificial forestland in arid region

Yang Xinming; Yang Wenzhi

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Study on the soil water balance of artificial forestland in arid region

- Study on the soil water balance of artificial forestland in arid region
- Bulletin of Soiland Water Conservation Vol. 7, Issue 3, Pages: 32-38(1988)
- 作者机构：
  
  中国科学院西北水土保持研究所
- 作者简介：
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- Published：1988
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Yang Xinming, Yang Wenzhi. Study on the soil water balance of artificial forestland in arid region[J]. Bulletin of Soiland Water Conservation, 1988, 7(3): 32-38.
DOI：

Yang Xinming, Yang Wenzhi. Study on the soil water balance of artificial forestland in arid region[J]. Bulletin of Soiland Water Conservation, 1988, 7(3): 32-38. DOI：

摘要

根据人工林地土壤水分收支平衡方程式

在陕北黄土丘陵区的安塞县水土保持站有设了水分平衡场

对人工刺槐林生态系中的水分平衡状况进行了多年的定量观测。分析结果认为

在半干旱的黄土丘陵区营造人工林之后

由于强烈的蒸发蒸腾和根系深层发育的吸水作用

会使土壤向干燥化发展。深层土壤储水补给调节树木需水的作用逐渐消失

使之只能依靠当年降水进行生长。从这个意义上来看

人工林是在不断地恶化自身生长的土壤水分条件

从而形成生长缓慢、生长量受降水量控制的局面。

Abstract

Soil water balance of the artificial forestland planted with locust treeshas been studied quantitatively for years on the water balance plots setsin Ansai soil conservatin station of loess hilly region in northern Shaanxi

based on the soil water balance equetion for the soil of artificial forestland.The analyse result shows that the soil is becoming dry because ofintense evapotransporation and the watersucking effect due to the development of the root system in deep layer if the artificial forest is madeon the loess hilly region with semiarid climate.The providing functionof the water stored in deep layer to adjust the need of water from treeswill be vanished

thus

only could the trees grow depending on the precipitation in current year.From this point of view

it is thought that the artificial forests deteriorate their own soil water condition constantly

whichmakes the trees grow slowly and limits the growth amount with water.

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