Effects of different water levels on cotton growth and water use through drip irrigation in an arid region with saline ground water of Northwest China

被引：111

作者：

Kang, Yaohu ^{[1
]}

Wang, Ruoshui ^{[1
,2
]}

Wan, Shuqin ^{[1
]}

Hu, Wei ^{[1
]}

Jiang, Shufang ^{[1
]}

Liu, Shiping ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China

[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

来源：

AGRICULTURAL WATER MANAGEMENT | 2012年 / 109卷

基金：

美国国家科学基金会;

关键词：

Cotton yield; Drip irrigation; Irrigation schedule; Evapotranspiration; Northwest China; USE EFFICIENCY; SOIL-SALINITY; LINT YIELD; EVOLUTION; AREA; L;

D O I：

10.1016/j.agwat.2012.02.013

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Due to the mismanagement of water and fertilizer application, cotton cultivation in Xinjiang Northwest China is faced with the problems of soil deterioration and groundwater table ascension. This study was conducted to evaluate the effects of different levels of water applied through drip irrigation on cotton yield and water use in an arid region of Northwest China. The experiment included five water treatments in which the soil matric potential (SMP) at a depth of 20 cm was controlled higher than -10 kPa (S1), -20 kPa (S2), -30 kPa (S3), -40 kPa (S4), and -50 kPa (S5) after cotton was established. The results revealed that the highest cotton evapotranspiration (ETc) was achieved under S1 (-10 kPa) treatment and the ETc, deep percolation and the ratio of deep percolation with irrigation water all increased with increasing SMP threshold. After three years experiment, no salt accumulation in surface soil layer was found under our irrigation schedule. The highest seed cotton yield was obtained when the SMP threshold was controlled above -30 kPa in 2008, and -20 kPa in 2009 and 2010. Moreover, the highest yield obtained after 3 years was 42% higher than the average yield achieved by local farmers in the area. Additionally, the water use value (WUE and IWUE) tended to increase as the SMP threshold decreased in 2009 and 2010. Considering the cotton yield and the impact of irrigation on the underground water table, an SMP higher than -20 kPa at 20 cm can be used as an indicator for cotton drip irrigation scheduling and agronomic practices in this area to help alleviate the dangerous increase in the water table while increasing the cotton seed yield. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：117 / 126

页数：10

共 31 条

[1] Cotton yield and water use efficiency at various levels of water and N through drip irrigation under two methods of planting [J].