干旱区生态环境知识资源中心(Arid): 宁夏黄土丘陵区苜蓿土壤水分的时空变异特征

Arid

	宁夏黄土丘陵区苜蓿土壤水分的时空变异特征
其他题名	The Characteristics of Spatiotemporal Variability of Soil Water of Alfalfa Fields in Hilly and Gully Loess Regions of Ningxia
	蔡进军; 张源润; 潘占兵; 董立国; 许浩; 王月玲; 季波; 马璠; 韩新生; 李生宝
来源期刊	水土保持研究
ISSN	1005-3409
出版年	2016
卷号	23 期号:1 页码:75-79,85
中文摘要	土壤水分是影响半干旱区植被生长和生态修复的限制性生态因子,开展土壤水分变化研究对脆弱生态系统的恢复和生产实践活动的指导都具有重要作用和实际意义。对半干旱黄土丘陵区苜蓿在时空尺度上土壤水分状况的变化规律进行了分析。结果显示:(1)不同类型苜蓿土壤体积含水量的年际变化规律大致相同,生长季变化大致可分为三个时期:土壤水分消耗期(35月)、土壤水分相对稳定期(67月)和土壤水分积累期(810月);(2)以不同深度土壤体积含水量的变异系数为标准,可将土壤水分的垂直分布划分为三个层次:020 cm土壤水分速变层、20 80 cm土壤水分活跃层和80180 cm土壤水分相对稳定层;(3)土壤体积含水量的坡向变化规律为西坡>北坡>南坡 >东坡,不同年份规律大致相同,但有小范围的波动,坡位变化规律为坡上<坡中<坡下,不同年份间的变化基本一致。
英文摘要	Soil moisture is one of the restrictive ecological factors affecting the growth of vegetation and ecological restoration in the semi-arid region,the research for variation of soil moisture has the important role and practical significance for guidance to fragile ecosystems restoration and production practices.The temporal and spatial scales of variation of soil moisture condition in alfalfa fields were analyzed in semi-arid loess hilly region.The results showed that:(1)the inter annual variation of soil volumetric water contents in different types of alfalfa fileds was substantially same,variations in the growing season could be roughly divided into three periods:the soil water consumption period(from March to May),relative soil moisture stabilization period (from June to July)and soil moisture accumulation period(from August to October);(2)if the coefficients of variation of the soil volumetric water contents in different soil depths were set as the standard,vertical distribution could be divided into three layers in soil profile:soil moisture rapid change layer(020 cm),soil moisture active layer(2080 cm),and soil moisture relative stabilizing layer(80180 cm);(3)soil volumetric water contents decreased in the order:the west slope>north slope>south slope>east slope,the patterns of soil water contents were almost the same in different years in terms of the slope aspects,but there were small-scale fluctuations,the variation levels increased in the order:upper slope
中文关键词	紫花苜蓿 ; 土壤体积含水量 ; 时空变异
英文关键词	Medicago sativa soil water content spatial and temporal variability
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5612648
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235007
作者单位	宁夏农林科学院荒漠化治理研究所, 银川, 宁夏 750002, 中国
推荐引用方式 GB/T 7714	蔡进军,张源润,潘占兵,等. 宁夏黄土丘陵区苜蓿土壤水分的时空变异特征[J],2016,23(1):75-79,85.
APA	蔡进军.,张源润.,潘占兵.,董立国.,许浩.,...&李生宝.(2016).宁夏黄土丘陵区苜蓿土壤水分的时空变异特征.水土保持研究,23(1),75-79,85.
MLA	蔡进军,et al."宁夏黄土丘陵区苜蓿土壤水分的时空变异特征".水土保持研究 23.1(2016):75-79,85.