Soil Anti-scourability of the Growing Grass and Its Relationship with Influencing Factors in the Loessial Soil Area

LIU Hongyan; ZHOU Zhengchao; LIU Jun’e; QIN Miao; LI Chao

doi:10.13870/j.cnki.stbcxb.2017.02.014

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Soil Anti-scourability of the Growing Grass and Its Relationship with Influencing Factors in the Loessial Soil Area

更新时间：2024-11-07

- Soil Anti-scourability of the Growing Grass and Its Relationship with Influencing Factors in the Loessial Soil Area
- Vol. 31, Issue 2, Pages: 72-78(2017)
- 作者机构：
  
  陕西师范大学旅游与环境学院,西安,710062
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2017.02.014
  CLC： S157.1
- Published：2017
- 稿件说明：
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LIU Hongyan, ZHOU Zhengchao, LIU Jun’e, et al. Soil Anti-scourability of the Growing Grass and Its Relationship with Influencing Factors in the Loessial Soil Area[J]. 2017, 31(2): 72-78.
DOI：

LIU Hongyan, ZHOU Zhengchao, LIU Jun’e, et al. Soil Anti-scourability of the Growing Grass and Its Relationship with Influencing Factors in the Loessial Soil Area[J]. 2017, 31(2): 72-78. DOI： 10.13870/j.cnki.stbcxb.2017.02.014.

摘要

采用室内盆栽与原状土冲刷相结合的方法，设置了裸地对照（CK）、低种植密度黑麦草（H1）和高种植密度黑麦草（H2）3种处理，对3种处理在不同生长阶段的土壤理化性质和根系变化进行研究，分析了黄土区草被生长过程中土壤抗冲性及其与影响因素的相关关系。结果表明：（1）处理CK的容重、有机质含量和水稳性团聚体在4个生长阶段波动变化，但变化范围较小；随生长周期的延长，H1和H2处理的土壤容重呈下降趋势，有机质含量、水稳性团聚体、根表面积密度（RSAD，root surface area density）和根生物量密度（RWD，root weight density）呈增加趋势；在4个生长阶段，H1和H2处理各根径的RSAD表现为随根系径级的增大而减小。（2）CK和H2处理的土壤抗冲指数（ASI，anti-scourability index）在4个生长阶段无显著性变化；H1处理的ASI随生长时间的延长表现为逐渐增加的趋势，且在第16周，对ASI的影响最显著。（3）ASI与土壤容重呈幂函数递减关系，与有机质含量、水稳性团聚体呈幂函数递增关系，与RSAD、RWD之间均呈指数递增函数关系。（4）ASI与容重、水稳性团聚体、1.0～2.0，2.0～5.0，＞5 mm径级的RSAD之间均无显著差异，与有机质含量、RSAD及RWD呈显著正相关（p＜0.05），与＜1 mm径级的RSAD呈极显著正相关（p＜0.01）。

Abstract

By combining indoor pot experiment and scouring of undisturbed soil

three treatments were set up

i. e. bare land(CK)

low planting density Lolium perenne L.(H1)

and high planting density Lolium perenne L.(H2)

to study the changes of soil physiochemical properties and root system at different growth stages. Soil anti-scourability of the growing grass and its relationship with influencing factors in loessial soil area were analyzed. The results showed that：(1) Soil bulk density

organic matter content

and water stable aggregate of CK fluctuated at four growth stages

but the range of changes were small. Soil bulk density decreased

organic matter content

water-stable aggregate

root surface area density (RSAD)

and root weight density (RWD) showed an increasing trend with the extension of the growth cycle of H1 and H2. The RSAD of H1 and H2 treatments decreased with increasing root diameter at four growth stages. (2) Soil anti-scourability index (ASI) of CK and H2 were not significantly different at four growth stages. The ASI of H1 showed an increasing trend with the extension of growth time

and the effect of H1 treatment on ASI was the most significant at the16th weeks. (3) ASI had a diminishing power function relationship with soil bulk density. ASI had an increasing power function relationship with organic matter content

and water-stable aggregate. ASI had an increasing exponential function relationship with RSAD

and RWD. (4) There was no significant different between ASI and bulk density

water-stable aggregate

and 1.0 mm to 2.0 mm

2.0 mm to 5.0 mm

and ＞5 mm diameter class RSAD. There was a significantly positive correlation between ASI and organic matter content

RSAD

and RWD (p＜0.05). There was a highly significantly positive correlation between ASI and ＜1 mm diameter class RSAD (p＜0.01).

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Related Institution

Research Centre for Soil Erosion & Eco-Restoration Sciences, Guizhou University

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中国科学院水利部水土保持研究所,陕西杨凌7121003. 西北农林科技大学林学院,陕西杨凌

CONG Wei1,ZHANG Xing-chang1,2,FENG Ye3(1.College of Resource and Environment,Northwest Sci-Tech University of Agriculture and Forestry,Yangling,Shaanxi 712100,2.Institute of Soil and Water Conservation,Chinese Academy of Sciences and the Ministry of Water Resources,3.College of Forestry,)

College of Resources and Environment, Jilin Agricultural University

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