河南农业科学2017，Vol.46Issue(5)：27-33,7.DOI:10.15933/j.cnki.1004-3268.2017.05.005
不同水氮运筹对冬小麦光合特性和产量的影响
Effects of Different Irrigation and Nitrogen Application on Photosynthetic Characteristics and Yield of Winter Wheat
摘要
Abstract
In order to determine the law of water and fertilizer requirement for high yield of wheat,the effects of different irrigation [W1 (moderate water stress:soil water content was 50％-60％ of the field capacity),W2(suitable irrigation:soil water content was 60％-70％ of the field capacity),W3 (full irrigation:soil water content was 70％-80％ of the field capacity)] and nitrogen[N1 (no nitrogen),N2 (normal nitrogen:225 kg/ha),N3 (high nitrogen:300 kg/ha)] application on photosynthesis and yield of winter wheat were studied with Zhoumai 27 as experiment material.The results showed that under the same soil moisture level,with the increase of nitrogen application rate,the wheat net photosynthetic rate (Pn) generally increased first and then kept steady,while the chlorophyll content (SPAD value),transpiration rate (Tr),conductance (Gs) and intercellular CO2 mole fraction(Ci) and yield increased first and then decreased.Under the same level of nitrogen,at 10 d after the flowering,with the increase of soil moisture,the SPAD value gradually increased except N1 treatment,while Ci decreased gradually,Pn,Tr and Gs generally decreased first and then increased;at 18 d after the flowering,SPAD,Pn,Tr and Gs increased in general,but there was no significant difference between the treatments of W2 and W3 (except Gs);at 26 d after flowering,SPAD value increased first and then decreased,Pn increased (there was no significant difference between the treatments of W2 and W3),Gs decreased first and then increased.Compared with N1 treatment,the yield of wheat increased by 11.87％ for N2 treatment and 7.86％ for N3 treatment under the same soil moisture level.Under the same amnount of nitrogen,compared with W1 treatment,the yield of wheat increased by 3.24％ for W2 treatment and 2.26％ for W3 treatment.In general,the yield was the highest under the W2N2 treatment (with the N of 225 kg/ha and the soil water content of 60％-70％ of the field capacity).The results showed that appropriate irrigation and nitrogen application could increase the wheat yield.关键词
小麦/水氮运筹/旗叶/光合特性/产量Key words
wheat/irrigation and nitrogen application/flag leaf/photosynthetic characteristics/yield分类
农业科技引用本文复制引用
李晶晶,尹钧,李武超,李磊..不同水氮运筹对冬小麦光合特性和产量的影响[J].河南农业科学,2017,46(5):27-33,7.基金项目
河南省基础与前沿技术研究项目(162300410167) （162300410167）
