干旱区生态环境知识资源中心(Arid): 水氮耦合对黑河中游绿洲制种玉米光合特性的影响

Arid

	水氮耦合对黑河中游绿洲制种玉米光合特性的影响
其他题名	Effect of water and nitrogen coupling on photosynthetic characteristic of seed maize in the oasis of middle reach of H eihe River Basin
	陈延昭; 张正; 韩国君; 郭艳红; 张凯; 陈年来
来源期刊	甘肃农业大学学报
ISSN	1003-4315
出版年	2014
卷号	49 期号:2 页码:72-76
中文摘要	以黑河中游绿洲制种玉米为材料,研究了水氮耦合对制种玉米光合特性的影响.结果表明:制种玉米叶片净光合速率在拔节期末达到最高,平均值为27.66mumol/(m~2·s),比苗期、灌浆期和成熟期平均高32.8%、22.5%和73.4%.其中,中水中氮处理玉米叶片净光合速率平均值为20.68mumol/(m~2·s)表现出良好的水氮互作效应,在整个生育期显著提高了叶片的净光合速率,且与高水中高氮处理间差异不显著.叶片蒸腾速率、气孔导度的变化与光合速率的变化基本一致,但中水中氮处理的玉米叶片蒸腾速率显著低于其他处理,且瞬时水分效率较高,具有良好的节水作用;拔节期至灌浆期气孔导度的降幅明显低于光合速率和蒸腾速率.玉米叶片光合速率和蒸腾速率与气孔导度极显著正相关.研究发现,轻度亏水配合中等施氮量处理是黑河中游绿洲制种玉米高产、高水效的适宜水氮组合.
英文摘要	Using seed maize in the oasis of middle reach of Heihe River Basin as materials,the effect of photosynthetic characteristic was investigated under different treatments of water and nitrogen coupling. The results indicated that photosynthetic rates reached the highest at the end of j ointing stage (average 27.66mumol/(m~2 · s),which was higher than seedling stage,booting stage and mature period 32.8%, 22.5%and 73.4% on average.The net photosynthetic rate significant increased during whole maize stages under mild water deficit with medium nitrogen treatment (average 20.68mumol/(m~2 ·s)),which performed a better water nitrogen interactions.The change of transpiration rate and stomatal conductance were the same as photosynthetic rate.The transpiration rate of middle water and nitrogen treatment was significant lower than any other treatments,but had batter instantaneous water efficiency,which showed batter water saving effect.The decline of stomatal conductance was markedly lower than the photosynthetic rate and transpiration rate from j ointing stage to booting stage.The photosynthetic rate and transpiration rate was significant positive correlation with stomatal conductance.The experiments suggest that mild water deficit with medium amount of nitrogen is the appropriate treatment,which can have high yield and high water effect in the oasis of middle reach of Heihe river basin.
中文关键词	水氮耦合 ; 制种玉米 ; 光合特性 ; 瞬时水分利用效率
英文关键词	water and nitrogen coupling seed maize photosynthetic characteristic WUE
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRONOMY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5148415
来源机构	甘肃农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231047
作者单位	甘肃农业大学资源与环境学院, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	陈延昭,张正,韩国君,等. 水氮耦合对黑河中游绿洲制种玉米光合特性的影响[J]. 甘肃农业大学,2014,49(2):72-76.
APA	陈延昭,张正,韩国君,郭艳红,张凯,&陈年来.(2014).水氮耦合对黑河中游绿洲制种玉米光合特性的影响.甘肃农业大学学报,49(2),72-76.
MLA	陈延昭,et al."水氮耦合对黑河中游绿洲制种玉米光合特性的影响".甘肃农业大学学报 49.2(2014):72-76.