沙棘林退化对土壤性质及水土流失的影响

谢立亚; 舒乔生

doi:10.13961/j.cnki.stbctb.2014.03.005

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沙棘林退化对土壤性质及水土流失的影响

试验研究

- 沙棘林退化对土壤性质及水土流失的影响
- Effects of Sea Buckthorn Degradation on Soil Properties and Soil and Water Loss
- 水土保持通报 2014年33卷第3期页码：19-23
- 作者机构：
  
  1. 重庆水利电力职业技术学院, 永川,重庆,402160
  2. 辽宁省水土保持研究所,辽宁,朝阳,122000
- 作者简介：
- 基金信息：
  
  辽宁省自然科学基金项目"辽西坡耕地植物地埂的抗蚀机理研究"(201202108);重庆水利电力职业技术学院人才引进基金项目"地埂植物带群体防蚀效益的空间评价"(KRC201304)
- DOI：10.13961/j.cnki.stbctb.2014.03.005
  中图分类号：
- 纸质出版：2014
- 稿件说明：
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谢立亚, 舒乔生. 沙棘林退化对土壤性质及水土流失的影响[J]. 水土保持通报, 2014,33(3):19-23.

XIE Li-ya, SHU Qiao-sheng. Effects of Sea Buckthorn Degradation on Soil Properties and Soil and Water Loss[J]. Bulletin of Soiland Water Conservation, 2014, 33(3): 19-23.
谢立亚, 舒乔生. 沙棘林退化对土壤性质及水土流失的影响[J]. 水土保持通报, 2014,33(3):19-23. DOI： 10.13961/j.cnki.stbctb.2014.03.005.

XIE Li-ya, SHU Qiao-sheng. Effects of Sea Buckthorn Degradation on Soil Properties and Soil and Water Loss[J]. Bulletin of Soiland Water Conservation, 2014, 33(3): 19-23. DOI： 10.13961/j.cnki.stbctb.2014.03.005.

摘要

辽宁省建平县有亚洲最大的人工沙棘(Hippophae rhamnoides Linn.)林

对防治当地水土流失具有重要的作用。然而由于多种原因

该区沙棘林呈现大面积死亡的现象。通过样地调查沙棘林的死亡程度

并进行土壤理化性质和水土流失的测定

研究了沙棘林退化对土壤性状和水土流失量的影响。结果表明

随着沙棘活立木数量的减少

土壤容重增加1.40%~7.31%

有机碳含量和全氮含量分别降低7.81%~21.89%和9.33%~27.65%

说明沙棘林退化对土壤结构和养分产生显著的破坏作用。人工模拟降雨试验表明

纯沙棘林地的水土流失较轻

侵蚀模数为539 t/(a·km

)。随着沙棘死亡率的提高

水土流失逐步加剧

入侵树种榆树纯林(Vlmus pumila)地达到1 526 t/(a·km

)。土壤性质的恶化和水土流失的加剧

会对土壤有机质和土壤结构进一步破坏

使沙棘死亡速度加快

从而形成恶性循环。

Abstract

The biggest sea buckthorn(Hippophae rhamnoides) artificial forest in the Asian is located in Jianping County

Liaoning Province

China

which has an important role in controlling soil and water loss. A large area of sea buckthorn in this district died for various reasons in recent years. In order to study the effects of sea buckthorn degradation on soil properties and soil and water loss

the forest's death rate was surveyed by sample plot

and soil physiochemical properties and soil and water loss were measured for different death rates. As the number of sea buckthorn living trees decreased

soil bulk density increased by 1.4%~7.31% and soil porosity and organic matter decreased by 7.81%~21.89% and 9.33%~27.65%

respectively

which shows that sea buckthorn degradation could destroy soil texture and nutrient significantly. The artificial rainfall simulation showed that soil erosion modulus of 539 t/(a·km2) was measured in well grew sea buckthorn forest and it increased with the increase in sea buckthorn death number. Soil erosion modulus reached 1 526 t/(a·km2) when sea buckthorn was almost replaced by elm(Ulmus pumila L.) because of removal of died sea buckthorn. The aggravation of soil and water loss and the deterioration of soil properties damaged soil organic matter and texture

then the death rate of sea buckthorn accelerated

and thus vicious cycle formatted.

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