Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Agricultural Research in the Arid Areas》 2004-04
Add to Favorite Get Latest Update

Effects of soil drought on photosynthesis, nitrogen and nitrogen translocation efficiency in wheat leaves

XU Zhen-zhu~1, WANG Chong-ai~2, LI Hui~3(1.Laboratory of Quantitative Vegetation Ecology, Institute of Botany, the Chinese Academy of Sciences, 20 Nanxincun, Xiangshan, Beijing 100093, China; 2. The Agricultural extension station of Ningyang, Ningyang, Shangdong 271400, China; 3. The vegetable management offices of Tai'an, Tai'an, Shangdong 27100, China)  
In the experiment, nitrogen level and its translocation efficiency in the flagleaves of two wheat cultivars (cv. Jian 17 and Lumai 21) were studied at four soil moisture levels. Moderate and severe soil drought significantly decreased the relative water content, chlorophyll content, photosynthetic rate, stomatal conductance, nitrogen level and yield, but moderate drought increased nitrogen efficiency and grain protein content. The cultivar with high grain protein content had higher nitrogen efficiency, although its nitrogen content in flag leaves was lower, which showed that soil drougnt sharply stimulated the accumulation of grain protein. It is suggested that moderate soil water deficit may enhance nitrogen translocation from leaves to grains so that the grain quality improves.
【Fund】: 国家重点基础研究发展规划项目(G1999043407);; 中国科学院创新工程项目(KZCXI-SW-01-12;KSCX2-1-07);; 国家自然科学基金项目(40231018)
【CateGory Index】: S512.1
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
Similar Journals
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved