干旱区生态环境知识资源中心(Arid): 模拟干化土壤中的植被生长及土壤水分变化

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	模拟干化土壤中的植被生长及土壤水分变化
其他题名	Effects of Simulated Dry Soil on Vegetation Growth and Soil Water Variaton
	白永红 1; 高志永 2; 陆静 2; 汪有科 3; 董建国 4
来源期刊	西北林学院学报
ISSN	1001-7461
出版年	2018
卷号	33 期号:5 页码:1-8,74
中文摘要	为了探讨黄土丘陵干化土壤中栽种植物生长及其土壤水分问题,试验采用野外地下大型土柱模拟当地深层干化土壤,并在试验土柱栽植典型植物早熟禾、柠条、苜蓿和刺槐,于2014-2016年定期观测试验植物生长及土柱内10 m土层土壤水分,分析干化土壤中不同植被生长状况及土壤水分变化和水分利用效率,以期为干化土壤建造植被提供依据。结果表明:1)模拟干化土壤中,早熟禾、柠条、苜蓿和刺槐种植地土壤水分活跃层分别为0~2.6、0~3.2、0~3 m和0~10 m,其中早熟禾种植地土壤活跃层水分得到提升,该层次土壤储水量较初期增加115.07 mm,柠条、苜蓿和刺槐在2014年后活跃层干化加剧,与初期土壤储水量相比,该层土壤储水量至2016年分别减少42.90、45.57 mm和241.57 mm。2)稳定层分别为2.6、3.2、3 m和10 m以下,稳定层土壤水分无显著差异(P>0.05),与初期相近。3)干化土壤中植被生长受当年降水量影响较大,株高生长量和单株生物量在2016年丰水年显著高于2015年枯水年(P<0.05)。4)早熟禾和苜蓿水分利用效率在枯水年>丰水年,柠条和刺槐水分利用效率在丰水年>枯水年。
英文摘要	Soil water is an important resource for the vegetations in the loess plateau,because most area of loess plateau belongs to arid and semi-arid region where rainfall is less and groundwater is deeper.The root of vegetation absorbs the deep soil water to keep the water consumption in dry season and caused soil desiccation that can result in the development of dry soil layer.However,information regarding management of soil drying layer is scarce.12 large underground soil columns,which diameter is 0.8 m and depth is 10 m,was used to simulate the deep dry soil,and Pratensis,Caragana,Alfalfa and Robinia was planted in the large underground soil columns.We observed the plant hight,ground diameter and individual biomass using tape measure,vernier caliper and balance.Soil moisture in all treatment groups was determined by using CNC100 neutron water gauging tubes placed at different depths,at 20 cm intervals,and measured over the course of 10 days during 2014 to 2016,while water consumption and water use efficiency were calculated using water balance methods.Significance and variance analysis were done using SPSS 18.0.Our results showed that 1) the range and rule of soil water content for different vegetation in simulated dry soil were different.Soil moisture changeable layer of pratensis,caragana,alfalfa and robinia were 0-2.6 m,0-3.2 m,0-3 m and 0-10 m,respectively.And soil moisture stable layer of which were 2.6-10 m,3.2-10 m and 3-10 m,respectively.The water content of changeable layer was restored by planting Pratensis,and comparing the intial soil water storgae in 2011,soil water storage at this level increased by 115.07 mm in 2016.however,The water content of changeable layer planted Caragana,Alfalfa and Robinia became more and more dry after 2014,and soil moisture of which soil layer could not restored in wet years,which rainfall was 581.3 mm.Comparing with the intial soil water storage at changeable layer in 2011,soil water storage decreased 42.90 mm,45.57 mm and 241.57 mm in 2016,respectively.2) There was no significant difference at 0.05 level in soil moisture stable layer for those vegatation,the soil moisture were ranged from 7.04% to 7.58%.Which was close to initial dried soil moisture.3) The growth of vegetation affected by rainfall,height growth and biomass per plant was significantly higher at 0.05 level in 2016 (wet year) than that in 2015 (dry year).4) Water use efficiency of Pratensis and Alfalfa was greater in dry years than in wet years,and water use efficiency of Caragana and Robinia was greater in wet years than in dry years.These results proved that different vegetation planted in dried soil layer resulted in different soil moisture changeable layer.Pratensis based on soil water content in the region was proper types of vegetation to manage dried soil layer,it could restore soil moisture in 0-2.6 m.The results of this study are critical for the development of sustainable management practices in the Loess Plateau,with the goal of relieving soil desiccation,and improving water use efficiency.
中文关键词	模拟 ; 干化土壤 ; 植被 ; 土壤水分 ; 水分利用效率
英文关键词	simulated dry soil vegetation soil moisture water use efficiency
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FORESTRY
WOS研究方向	Forestry
CSCD记录号	CSCD:6340401
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238463
作者单位	1.西北农林科技大学资源环境学院, 杨陵, 陕西 712100, 中国; 2.西安理工大学, 西北旱区生态水科工程国家重点实验室培养基地, 西安, 陕西 710048, 中国; 3.中国科学院教育部水土保持与生态环境研究中心;;西北农林科技大学水利与建筑工程学院, ;;, 杨陵;;杨陵, 陕西;;陕西 712100;;712100, 中国; 4.西北农林科技大学水利与建筑工程学院, 杨陵, 陕西 712100, 中国
推荐引用方式 GB/T 7714	白永红,高志永,陆静,等. 模拟干化土壤中的植被生长及土壤水分变化[J]. 西北农林科技大学,2018,33(5):1-8,74.
APA	白永红,高志永,陆静,汪有科,&董建国.(2018).模拟干化土壤中的植被生长及土壤水分变化.西北林学院学报,33(5),1-8,74.
MLA	白永红,et al."模拟干化土壤中的植被生长及土壤水分变化".西北林学院学报 33.5(2018):1-8,74.