Differences of Soil Water Characteristic and Above-ground Biomass between Single and Composite Vegetation in Water-Wind Erosion Crisscross Region

doi:10.11733/j.issn.1007-0435.2015.06.010

Acta Agrestia Sinica ›› 2015, Vol. 23 ›› Issue (6): 1197-1205.DOI: 10.11733/j.issn.1007-0435.2015.06.010

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Differences of Soil Water Characteristic and Above-ground Biomass between Single and Composite Vegetation in Water-Wind Erosion Crisscross Region

JIA Mu-lin¹, FAN Jun¹, WANG Ya-fei²

1. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, College of Resources and Environment Northwest A & F University, Yangling, Shaanxi Province 712100, China;
2. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling, Shaanxi Province 712100, China

Received:2014-10-27 Revised:2015-03-22 Online:2015-12-15 Published:2016-02-01

水蚀风蚀交错区复合植被与单一植被土壤水分特征及其地上生物量差异

贾沐霖¹, 樊军¹, 王亚飞²

1. 西北农林科技大学资源环境学院黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西杨凌 712100;
2. 中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西杨凌 712100

通讯作者: 樊军
作者简介:贾沐霖(1989-),男,内蒙古赤峰人,硕士研究生,E-mail:jiamulinmy@163.com
基金资助:
国家自然科学基金(41271239);中国科学院西部行动计划项目(KZCX2-XB3-13)资助

Abstract

Abstract:

Using the method of field investigations, the plots of typical vegetation types were selected in Liudaogou watershed of Shenmu County, Yulin City, Shaanxi Province on August 2013 to study differences of soil water characteristic, biomass, and the influence factors between single vegetation and composite vegetation in water/wind erosion crisscross region on Loess Plateau. The results showed that the canopy height, degree of surface vegetation coverage, leaf area index and aboveground biomass were improved significantly after deep root plants compounded with shallow root plants; the soil water content in surface increased significantly; species richness also showed a trend of increase. The main factors of affecting differences of aboveground biomass between single vegetation and composite vegetation were the differences of absorbing water between compound vegetation root system and the single vegetation root system, and the differences of utilizing soil moisture in different depth between deep root shrubs and shallow root herbaceous plants. Aboveground biomass of herbaceous vegetation increased with the increase of soil water content within 100 cm and showed no significant correlation with bulk density and hydraulic conductivity. Therefore, deep root plants matching with shallow root plants in the process of vegetation restoration construction can utilize limited water resources reasonably and effectively, improve aboveground biomass of vegetation, canopy height and vegetation coverage on surface, and consequently control soil erosion effectively in water/wind erosion crisscross region.

Key words: The Loess Plateau, Single vegetation, Composite vegetation, Moisture characteristic, Above-ground biomass

摘要：

采用野外调查的方法,于2013年8月选取位于黄土高原水蚀风蚀交错区的陕西省榆林市神木县六道沟流域典型植被类型样地,研究复合植被与单一植被的土壤水分特征、生物量差异及其影响因素。结果显示:深根型植物与浅根型植物复合后其冠层高度、地表植被盖度、叶面积指数和地上生物量都有显著提高;土壤表层含水量显著增加;物种丰富度也呈增加趋势。影响复合植被和单一植被地上生物量差异的主要因素是其根系对水分吸收利用的差异,以及深根型灌木和浅根型草本植物对不同深度土壤水分的利用差异。草本植被地上生物量随100 cm内土壤含水量的增加而增加,而与容重和导水率相关性不显著。因此在植被恢复建设过程中,深根型植物宜与浅根型植物搭配种植,可以合理有效利用有限水资源,提高植被地上生物量、冠层高度和地表植被盖度,从而可以有效控制水蚀风蚀交错区的土壤侵蚀。

关键词: 黄土高原, 单一植被, 复合植被, 水分特征, 地上生物量

CLC Number:

S152.7

JIA Mu-lin, FAN Jun, WANG Ya-fei. Differences of Soil Water Characteristic and Above-ground Biomass between Single and Composite Vegetation in Water-Wind Erosion Crisscross Region[J]. Acta Agrestia Sinica, 2015, 23(6): 1197-1205.

贾沐霖, 樊军, 王亚飞. 水蚀风蚀交错区复合植被与单一植被土壤水分特征及其地上生物量差异[J]. 草地学报, 2015, 23(6): 1197-1205.

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Differences of Soil Water Characteristic and Above-ground Biomass between Single and Composite Vegetation in Water-Wind Erosion Crisscross Region

水蚀风蚀交错区复合植被与单一植被土壤水分特征及其地上生物量差异

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