干旱区生态环境知识资源中心(Arid): 水氮互作全膜覆盖玉米光合特性和叶水势的日变化

Arid

	水氮互作全膜覆盖玉米光合特性和叶水势的日变化
其他题名	Photosynthetic characteristics and leaf water potential diurnal variation of maize under plastic film mulching and different water nitrogen coupling
	石多琴; 柴强; 于爱忠
来源期刊	甘肃农业大学学报
ISSN	1003-4315
出版年	2014
卷号	49 期号:1 页码:54-
中文摘要	针对水氮互作提高限量灌溉玉米水分利用效率理论依据薄弱问题,通过田间试验,设置了不同水氮处理,研究了绿洲灌区不同灌水量和施氮组合对玉米光合特性及叶水势日变化的影响,以期为干旱地区以氮调水、提高作物水分利用效率提供依据.结果表明:玉米的净光合速率、蒸腾速率、气孔导度、叶水势均随灌水量的增加而提高,但叶片WUE 随灌水量的增加而降低.在同一灌水量下,360 kg/hm~2的施氮量有利于提高玉米叶片的光合速率、蒸腾速率、气孔导度和叶片WUE,施氮量达到540 kg/hm~2时玉米的光合速率、蒸腾速率、气孔导度较360 kg/hm~2施氮处理呈下降趋势.适于玉米高效进行光合作用的施氮量在360 ~ 540 kg/hm~2之间.在低灌水量(5 700 m3/hm~2)的条件下,增施氮肥降低了叶水势;灌水量增加时,玉米叶水势随氮肥施用量的增加而提高.灌水量和施氮量对玉米净光合速率、蒸腾速率、叶水势、WUE的互作效应明显,但二者对气孔导度的互作效应不显著;施氮量对WUE的影响大于灌水量的影响,水分胁迫导致玉米净光合速率和水分利用效率的降低可通过增施氮肥得到部分补偿.水氮协同调控是优化玉米光合特性的可行途径.
英文摘要	In order to provide a basis for improving crop water use efficiency through water and nitrogen interaction,the effects of different irrigation and nitrogen fertilizer combinations on photosynthetic characteristics and diurnal changes of leaf water potential of maize in oasis irrigation area was studied through field test.Results show that all of the NET photosynthetic rate of corn(P _n),tanspiration rate (T _r),stomatal conductance(Cond),leaf water potential(LWP)increased with the increasing of irrigation. But theWUE of leaf decreased with the increasing of irrigation.Under the same irrigation amount,applying with 360 kg/hm2 nitrogen enhanced NET photosynthetic rate,tanspiration rate,stomatal conductance and WUE of leaves,which were all decreased when applying with 540 kg/hm~2 nitrogen.Suitable nitrogen amount for high photosynthesis of maize was 360~540 kg/hm~2.Under low irrigation amount,increasing nitrogen amount could reduce leaf water potential.But with the improvement of irrigation,leaf water potential increased with the increasing of nitrogen application.The interaction effects of irrigation and nitrogen on corn’s net photosynthetic rate,transpiration rate and the leaf water potential and WUE effects were all significant,which on stomatal conductance was not obvious.Effect of nitrogen on WUE was greater than water.The decrease of net photosynthetic rate and water use efficiency lead by water stress could be equalized partly by increasing nitrogen application.This suggested that water and nitrogen intermediation was the feasible method to optimize the photosynthetic characteristics of maize.
中文关键词	玉米 ; 水氮互作 ; 地膜覆盖 ; 光合特性 ; 叶水势 ; 水分利用效率
英文关键词	maize water and nitrogen interaction whole plastic-film mulch photosynthetic characteristics leaf water potential water use efficiency
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Agriculture
WOS研究方向	Agriculture
CSCD记录号	CSCD:5095031
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/2XILL650/231045
作者单位	石多琴, 甘肃农业大学农学院, 甘肃省干旱生境作物学重点实验室, 兰州, 甘肃 730070, 中国.; 柴强, 甘肃农业大学农学院, 甘肃省干旱生境作物学重点实验室, 兰州, 甘肃 730070, 中国.; 于爱忠, 甘肃农业大学农学院, 甘肃省干旱生境作物学重点实验室, 兰州, 甘肃 730070, 中国.
推荐引用方式 GB/T 7714	石多琴,柴强,于爱忠. 水氮互作全膜覆盖玉米光合特性和叶水势的日变化[J]. 甘肃农业大学,2014,49(1):54-.
APA	石多琴,柴强,&于爱忠.(2014).水氮互作全膜覆盖玉米光合特性和叶水势的日变化.甘肃农业大学学报,49(1),54-.
MLA	石多琴,et al."水氮互作全膜覆盖玉米光合特性和叶水势的日变化".甘肃农业大学学报 49.1(2014):54-.