干旱区生态环境知识资源中心(Arid): 西北旱区制种玉米灌浆期气孔导度与叶水势对水氮胁迫的响应

Arid

	西北旱区制种玉米灌浆期气孔导度与叶水势对水氮胁迫的响应
其他题名	Response of stomatal conductance and leaf water potential to water and nitrogen stress during grain-filling period of hybrid seed maize in arid region of the northwestern China
	邓鑫; 冉辉; 于庭高; 彭雪莲; 纪莎莎; 胡笑涛
来源期刊	干旱地区农业研究
ISSN	1000-7601
出版年	2020
卷号	38 期号:4 页码:253-258
中文摘要	为了探究西北旱区制种玉米水氮胁迫条件下的生理节水机理,设置充分灌溉(FI)与亏缺灌溉(DI)处理,以及施氮(N150)与不施氮(N0)处理,分析了不同水氮模式下叶水势与气孔特征的变化规律。结果表明:充分灌溉条件下,施氮主要通过增加气孔开度和气孔数量提高气孔导度,与不施氮处理相比,气孔开度提高19.46%,气孔数量增加8.46%;亏缺灌溉条件下则通过增加单位面积开放气孔数量和降低气孔开度来应对水分消耗,提高抗旱能力,与充分灌溉相比,亏缺灌溉气孔开度平均降低21.38%,气孔数量平均增加14.08%;增加灌水量能极显著增大气孔开度(P<0.05)和提高玉米叶片黎明和正午叶水势值,促进作物蒸腾作用; FIN150处理较DIN150处理黎明和正午叶水势均值分别上升了3.30%和2.00%,FIN0处理较DIN0处理黎明和正午叶水势均值分别上升了13.41%和14.29%;亏缺灌溉条件下,施氮处理黎明和正午叶水势均值分别上升了2.87%和0.17%。干旱导致气孔导度及正午叶水势的降低可以通过增施氮肥得到部分补偿。
英文摘要	To explore the physiological water-saving mechanism of hybrid seed maize under the conditions ofwater and nitrogen stress in arid region of the northwestern China,the treatments including two irrigation rates,full (FI) and deficit irrigation (DI) combining with two nitrogen (N) rates,150 kg·hm~(-2)(N150) and 0 kg·hm~(-2) (N0),were studied. The changes of leaf water potential and stomatal characteristics were measured. The results showed that N mainly improved stomatal conductance by increasing stomatal divergence degree and stomatal number under the condition of full irrigation,the stomatal divergence degree was increased by 19.46% and the stomatal number by 8.46% compared with no N treatments.For deficit irrigation,the water consumption was responded by increasing the number of open pores per unit area and decreasing the stomatal opening to improve drought resistancem, more stomatal with smaller opening per unit area were found to cope with water loss and improve drought resistance, the stomatal divergence degree of deficit irrigation decreased by 21.38% and the stomatal number increased by 14.08% on average compared with full irrigation. The stomatal divergence degree was significantly increased (P< 0.01) and leaf water potential dawn and midday leaf water potential of maize leaves was increased with the increase of irrigation amount,which promoted crop transpiration. Compared with DIN150 treatment,the mean water potential of dawn and midday leaves in FIN150 treatment increased by 3.30% and 2.00%,respectively. Compared with DIN0 treatment,the mean water potential of dawn and midday leaves in FIN0 treatment increased by 13.41% and 14.29%, respectively.Nitrogen-treated dawn and midday leaf water potential means increased by 2.87% and 0.17% under deficit irrigation condition,respectively. The stomatal divergence degree, and leaf water potential before dawn and midday of maize leaves were significantly increased with increasing irrigation amount,which promoted crop transpiration. Nitrogen application helped increasing leaf water potential before dawn and midday under deficit irrigation condition.The decrease in the stomatal conductance and the midday leaf water potential caused by drought was partially compensated by increasing N rate.
中文关键词	水氮胁迫 ; 制种玉米 ; 叶水势 ; 气孔导度 ; 气孔特征
英文关键词	water and nitrogen stress hybrid seed maize leaf water potential stomatal conductance stomatal characteristics
类型	Article
语种	中文
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:6810846
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336933
作者单位	邓鑫, 西北农林科技大学, 旱区农业水土工程教育部重点实验室, 杨凌, 陕西 712100, 中国.; 冉辉, 西北农林科技大学, 旱区农业水土工程教育部重点实验室, 杨凌, 陕西 712100, 中国.; 于庭高, 西北农林科技大学, 旱区农业水土工程教育部重点实验室, 杨凌, 陕西 712100, 中国.; 彭雪莲, 西北农林科技大学, 旱区农业水土工程教育部重点实验室, 杨凌, 陕西 712100, 中国.; 胡笑涛, 西北农林科技大学, 旱区农业水土工程教育部重点实验室, 杨凌, 陕西 712100, 中国.; 纪莎莎, 中国农业大学中国农业水问题研究中心, 北京 100083, 中国.
推荐引用方式 GB/T 7714	邓鑫,冉辉,于庭高,等. 西北旱区制种玉米灌浆期气孔导度与叶水势对水氮胁迫的响应[J],2020,38(4):253-258.
APA	邓鑫,冉辉,于庭高,彭雪莲,纪莎莎,&胡笑涛.(2020).西北旱区制种玉米灌浆期气孔导度与叶水势对水氮胁迫的响应.干旱地区农业研究,38(4),253-258.
MLA	邓鑫,et al."西北旱区制种玉米灌浆期气孔导度与叶水势对水氮胁迫的响应".干旱地区农业研究 38.4(2020):253-258.