Interactive effect of irrigation and nitrogen application on physiological characteristics of flag leaf and grain yield of winter wheat in dry years

Abstract

Abstract: The field studies indicated that in dry years,both irrigation and nitrogen application had a marked yield increment effect,but irrigation played a more important role.Irrigation at jointing and booting stages could induce a higher grain yield,but irrigation at jointing,booting and grain-filling stages had a less yield increment effect if nitrogen was applied as base fertilizer.Insufficient irrigation reduced the nitrogen efficiency and yield,which could be compensated to some extent by increasing the nitrogen application rate.Only a suitable combination of irrigation and nitrogen application could effectively coordinate the relationship between yield components and increase grain yield.

Key words: Winter wheat, Dry year, Irrigation and nitrogen application, Physiological characteristics, Interactive effects, Yield factors

CLC Number:

S512.1

GUO Tiancai, FENG Wei, ZHAO Huijie, WANG Huacen, WANG Yonghua, XIA Guojun, MA Dongyun. Interactive effect of irrigation and nitrogen application on physiological characteristics of flag leaf and grain yield of winter wheat in dry years[J]. Chinese Journal of Applied Ecology, 2004, (3): 453-457.

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