Biomass accumulation and radiation use efficiency of winter wheat under deficit irrigation regimes

被引：31

作者：

Li, Q. ^{[1
,2
]}

Liu, M. ^{[1
]}

Zhang, J. ^{[3
]}

Dong, B. ^{[1
]}

Bai, Q. ^{[2
]}

机构：

[1] Chinese Acad Sci, Inst Genet & Dev Biol, Ctr Agr Resources Res, Shijiazhuang 050021, Peoples R China

[2] Shandong Agr Univ, Coll Water Conservancy & Civil Engn, Tai An 271018, Shandong, Peoples R China

[3] Shandong Agr Univ, Coll Agron, Natl Key Lab Crop Biol, Tai An 271018, Shandong, Peoples R China

来源：

PLANT SOIL AND ENVIRONMENT | 2009年 / 55卷 / 02期

关键词：

leaf area index; PAR capture ratio; PAR reflection ratio; PAR penetration ratio; grain yield; winter wheat; deficit irrigation; WATER-USE EFFICIENCY; NORTH CHINA; SUMMER MAIZE; YIELD; PRODUCTIVITY; GROWTH; CROPS;

D O I：

10.17221/315-PSE

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

To better understand the potential for improving biomass accumulation and radiation use efficiency (RUE) of winter wheat under deficit irrigation regimes, in 2006-2007 and 2007-2008, an experiment was conducted at the Luancheng Experimental Station of Chinese Academy of Science to study the effects of deficit irrigation regimes on the photosynthetic active radiation (PAR), biomass accumulation, grain yield, and RUE of winter wheat. In this experiment, field experiment involving winter wheat with 1, 2 and 3 irrigation applications at sowing, jointing, or heading stages was conducted, and total irrigation water was all controlled at 120 mm. The results indicate that irrigation 2 or 3 times could help to increase the PAR capture ratio in the later growing season of winter wheat; this result was mainly due to the changes in the vertical distributions of leaf area index (LAI) and a significant increase of the LAI at 0-20 cm above the ground surface (LSD, P < 0.05). Compared with irrigation only once during the growing season of winter wheat, irrigation 2 times significantly (LSD, P < 0.05) increased aboveground dry matter at maturity; irrigation at sowing and heading or jointing and heading stages significantly (LSD, P < 0.05) improved the grain yield, and irrigation at jointing and heading stages provided the highest RUE (0.56 g/mol). Combining the grain yield and RUE, it can be concluded that irrigation at jointing and heading stages has higher grain yield and RUE, which will offer a sound measurement for developing deficit irrigation regimes in North China.

引用

页码：85 / 91

页数：7