干旱区生态环境知识资源中心(Arid): 黄土丘陵区枣林土壤水分动态及其对蒸腾的影响

Arid

	黄土丘陵区枣林土壤水分动态及其对蒸腾的影响
其他题名	Soil Moisture Characteristics and Its Influence on Jujube Tree Transpiration in Loess Hilly Region
	魏新光 1; 聂真义 2; 刘守阳 3; 佘檀 4; 马建鹏 5; 汪有科 1
来源期刊	农业机械学报
ISSN	1000-1298
出版年	2015
卷号	46 期号:6 页码:130-140
中文摘要	为了探明黄土高原半干旱区山地枣林蒸腾和土壤水分间的关系,对山地枣林的土壤水分和枣树茎液流动态进行了连续3年的定位监测,结果表明:土壤含水率时空变异性显著,垂直方向上随着土层深度的增加,变异系数(C_v)逐渐降低。其自上而下可划分为土壤水分变化层(0~2.6 m)、土壤水分干层(2.6~6.0 m)和土壤水分恢复层(6.0~10.0 m)。枣树液流监测的参数在生育期和休眠期间具有显著性差异,根据这一特征可以对枣树生育期进行较为准确的界定。基于液流参数特征确定的生育期与观察树体萌芽、落叶确定的生育期时长基本一致,均约为160 d,但基于液流参数确定的生育期较后者约提前5 d。土壤水分的增加会使枣树液流(瞬时蒸腾)的谷值出现时间提前,峰值出现时间推后,"午休"时间缩短,旺盛蒸腾时间延长,反之亦然。枣树生育前期蒸腾均呈逐日增加趋势,而生育中后期蒸腾和土壤水分呈极显著的正相关关系。
英文摘要	In order to explore the relationships between jujube tree transpiration and soil moisture in semi-arid loess hilly area, soil moisture and jujube tree sap flow were monitored for three consecutive years. Results showed that temporal and spatial variability of soil moisture were significant. Soil moisture increased with the increase of soil depth but its coefficient of variation decreased gradually in the vertical direction. According to the variation of soil moisture, soil depth was divided into three layers from top to bottom: soil moisture changing layer (0~2.6 m), dried soil layer (2.6~6.0 m) and soil moisture recovery layer (6.0~10.0 m). Parameters of jujube tree sap flow were significantly different between growth period and dormant period, therefore, the growth period of jujube tree could be demarcated more accurately. The growth period divided based on sap flow characteristics lasted about 160 d, which was similar to that determined by sprout and defoliation observation method, but it started and ended nearly 5 d in advance. The increase of soil moisture led to forward of minimum values and delay of maximum values of jujube tree sap flow, the "lunch break" time was shortened, but the transpiration time was strongly prolonged, and vice versa. Jujube tree sap flow increased at the early growth stage, and the positive correlation between transpiration and soil moisture were significant at the middle and late growth stages.
中文关键词	土壤水分 ; 蒸腾 ; 土壤干层 ; 液流特征 ; 黄土丘陵区
英文关键词	Soil moisture Transpiration Dried soil layer Sap flow characteristics Loess hilly region
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURAL ENGINEERING
WOS研究方向	Agriculture
CSCD记录号	CSCD:5449729
来源机构	西北农林科技大学 ; 中国科学院水利部水土保持研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233066
作者单位	1.西北农林科技大学水利与建筑工程学院, 杨凌, 陕西 712100, 中国; 2.西北农林科技大学水土保持研究所, 国家节水灌溉杨凌工程技术研究中心, 杨凌, 陕西 712100, 中国; 3.法国国家农业科学研究院地中海气候与农业水利系统模拟实验室, 阿维尼翁, 84914; 4.西北农林科技大学水利与建筑工程学院, 国家节水灌溉杨凌工程技术研究中心, 杨凌, 陕西 712100, 中国; 5.中国科学院水利部水土保持研究所, 国家节水灌溉杨凌工程技术研究中心, 杨凌, 陕西 712100, 中国
推荐引用方式 GB/T 7714	魏新光,聂真义,刘守阳,等. 黄土丘陵区枣林土壤水分动态及其对蒸腾的影响[J]. 西北农林科技大学, 中国科学院水利部水土保持研究所,2015,46(6):130-140.
APA	魏新光,聂真义,刘守阳,佘檀,马建鹏,&汪有科.(2015).黄土丘陵区枣林土壤水分动态及其对蒸腾的影响.农业机械学报,46(6),130-140.
MLA	魏新光,et al."黄土丘陵区枣林土壤水分动态及其对蒸腾的影响".农业机械学报 46.6(2015):130-140.