应用生态学报2017，Vol.28Issue(11)：3653-3662,10.DOI:10.13287/j.1001-9332.201711.018
黄土旱塬区冬小麦土壤水库动态
Dynamics of soil water reservoir of wheat field in rain-fed area of the Loess Tableland, China
摘要
Abstract
Soil reservoir is the basis of stable grain production and sustainable development in dry farming area.Based on the long-term field experiment,this paper investigated the changes of soil moisture in wheat field located in the rain-fed Changwu Tableland,and analyzed the interannual and annual variation characteristics and dynamics trends of soil reservoir from 2012 to 2015.The results showed that the vertical distribution curves of average soil water content were "double peaks and double valleys":first peak and valley occurred in the 10-20 and 50 cm soil layer,respectively,while for the second peak and valley,the corresponding soil layer was the 100 and 280 cm soil layer.Soil reservoir did not coincide with precipitation for all yearly precipitation pattems but lagged behind.Yearly precipitation patterns had a great influence on the interannual and annual dynamic changes of soil reservoir.Compared with rainy year,the depth of soil moisture consumption decreased and supplementary effect of precipitation on soil moisture became obvious under effects of drought year and normal year.In rainy year,soil reservoir had a large surplus (84.2 mm),water balance was compensated;in normal year,it had a slight surplus (9.5 mm),water balance was compensated;while in drought year,it was slightly deficient (1.5 mm),water balance was negatively compensated.The dynamics of soil water in winter wheat field in the rain-fed Changwu Tableland could be divided into four periods:seedling period,slow consumption period,large consumption period,and harvest period,the order of evapotranspiration was large consumption period ＞ seedling period＞ harvest period＞ slow consumption period.关键词
黄土旱塬区/冬小麦/土壤水库/蒸散/土壤干层Key words
rain-fed area of the Loess Tableland/winter wheat/soil reservoir/evapotranspiration/soil desiccation引用本文复制引用
李鹏展,王力,王棣..黄土旱塬区冬小麦土壤水库动态[J].应用生态学报,2017,28(11):3653-3662,10.基金项目
本文由国家自然科学基金项目(41390463,41530854,41571218)和中央高校基本科研业务费项目(2452015120)资助 This work was supported by the Natural Science Foundation of China (41390463,41530854,41571218) and the Fundamental Research Funds for Central Universities and Colleges (2452015120). （41390463,41530854,41571218）
