干旱区生态环境知识资源中心(Arid): 施氮和干旱锻炼后复水/复旱对小麦水分利用效率的影响

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	施氮和干旱锻炼后复水/复旱对小麦水分利用效率的影响
其他题名	Effects of Nitrogen Application and Rewatering and Redrought after Drought Priming on Water Use Efficiency of Wheat
	邢佳伊; 李丽; 王超; 邢换丽; 郝卫平; 王耀生
来源期刊	中国农业气象
ISSN	1000-6362
出版年	2021
卷号	42 期号:3 页码:181-189
中文摘要	以XR4347冬小麦品种为供试作物,在温室内开展盆栽试验。试验设置不施氮(N0)和施氮(N1,1.5g·盆~(-1))2个氮素水平,每个水平下设置3种水分处理模式,即全程充分灌水(CK)、干旱锻炼后复水(PW)和干旱锻炼后复旱(PD),研究施氮和干旱锻炼后复水/复旱对冬小麦水分利用效率的影响。结果表明:干旱锻炼后复旱使植株水势降低。与CK和PW处理相比,干旱锻炼后复旱对气孔导度(g_s)的降低作用大于光合速率(P_n)的下降,因此,提高了叶片和植株水平的水分利用效率。在CK和PW处理下,施氮与未施氮处理相比,叶片的P_n和g_s均显著提高,而内在水分利用效率(WUE_(int),P_n/g_s)小幅度增加。PD处理下,施氮对g_s的影响大于对P_n的影响,与不施氮(N0)处理相比,施氮(N1)处理下小麦叶片P_n增加4.5%,而g_s下降13.6%,因此,WUE_(int)显著提高。干旱锻炼后复旱显著降低了施氮后植株的g_s和耗水量,其WUEb和叶片delta~(13)C在施氮后最高,进一步表明干旱锻炼后复旱条件下施氮提高植株的WUEb主要是由于气孔的调控造成的。因此,在干旱缺水地区,将干旱锻炼与施氮结合,不仅可以显著降低植株耗水量、节约灌溉用水、维持作物生长和养分吸收,还可以提高叶片和植株水平的水分利用效率。
英文摘要	A pot experiment in the greenhouse was conducted with the variety XR4347 of winter wheat in order to investigate the effect of rewatering/redrought stress after drought priming and nitrogen application on water use efficiency of winter wheat.The experiment included two nitrogen levels with no nitrogen (N0) and nitrogen fertilization (N1,1.5g·pot~(-1)),and three water treatments under each nitrogen level consisting of full irrigation (CK),rewatering after drought priming (PW),and redrought stress after drought priming (PD).The results showed that redrought stress after drought priming decreased the water potential of plants.Compared with the CK and PW treatments,the reduction of stomatal conductance (g_s) of PD treatment was greater than the reduction of net photosynthetic rate (P_n),and therefore,the water use efficiency at the leaf and plant level was improved.Under the CK and PW treatments,the P_n and g_s of leaves were significantly increased under nitrogen fertilization compared with no nitrogen application,whereas the intrinsic water use efficiency (WUE_(int),P_n/g_s) of leaves increased slightly.Under the PD treatment,the effect of nitrogen application on g_s was greater than that on P_n.The P_n increased by 4.5% while g_s decreased by 13.6%,and therefore,WUE_(int) increased significantly.Furthermore,the PD treatment significantly reduced the g_s and the water consumption under nitrogen fertilization,and the WUEb and leaf delta~(13)C were the highest with nitrogen fertilization,further indicating that the higher WUEb of the PD treatment under nitrogen fertilization was due to the stomatal control.Therefore,in arid and water-deficient areas,the combination of drought priming and nitrogen fertilization can not only significantly reduce plant water consumption,save irrigation water,maintain crop growth and nutrient absorption,but also improve water use efficiency at the leaf and plant level.
中文关键词	灌溉 ; 养分 ; 水分胁迫 ; 气孔导度 ; 水势
英文关键词	delta~(13)C Irrigation Nutrient Water stress Stomatal conductance Water potential delta~(13)C
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:6938728
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/378089
作者单位	邢佳伊, 中国农业科学院农业环境与可持续发展研究所, 作物高效用水与抗灾减损国家工程实验室;;农业农村部旱作节水农业重点实验室, 北京 100081, 中国.; 李丽, 中国农业科学院农业环境与可持续发展研究所, 作物高效用水与抗灾减损国家工程实验室;;农业农村部旱作节水农业重点实验室, 北京 100081, 中国.; 王超, 中国农业科学院农业环境与可持续发展研究所, 作物高效用水与抗灾减损国家工程实验室;;农业农村部旱作节水农业重点实验室, 北京 100081, 中国.; 邢换丽, 中国农业科学院农业环境与可持续发展研究所, 作物高效用水与抗灾减损国家工程实验室;;农业农村部旱作节水农业重点实验室, 北京 100081, 中国.; 郝卫平, 中国农业科学院农业环境与可持续发展研究所, 作物高效用水与抗灾减损国家工程实验室;;农业农村部旱作节水农业重点实验室, 北京 100081, 中国.; 王耀生, 中国农业科学院农业环境与可持续发展研究所, 作物高效用水与抗灾减损国家工程实验室;;农业农村部旱作节水农业重点实验室, 北京 100081, 中国.
推荐引用方式 GB/T 7714	邢佳伊,李丽,王超,等. 施氮和干旱锻炼后复水/复旱对小麦水分利用效率的影响[J],2021,42(3):181-189.
APA	邢佳伊,李丽,王超,邢换丽,郝卫平,&王耀生.(2021).施氮和干旱锻炼后复水/复旱对小麦水分利用效率的影响.中国农业气象,42(3),181-189.
MLA	邢佳伊,et al."施氮和干旱锻炼后复水/复旱对小麦水分利用效率的影响".中国农业气象 42.3(2021):181-189.