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EFFECT OF IRRIGATION AT DIFFERENT GROWTH STAGES ON WATER USE EFFICIENCY AND LEAF PHYSIOLOGICAL CHARACTERISTICS OF SOYBEAN(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2007年05期
Page:
695-699
Research Field:
Publishing date:

Info

Title:
EFFECT OF IRRIGATION AT DIFFERENT GROWTH STAGES ON WATER USE EFFICIENCY AND LEAF PHYSIOLOGICAL CHARACTERISTICS OF SOYBEAN
Author(s):
WU Xiang-liang1; GAO Ju-lin1; WANG Zhi-gang1; LI Li-jun1; ZHANG Bai-ge1; HUANG Zhen-gang2; HUANG Fu-min2; WANG Jian-ming3; LI Shu-fang3
1College of Agronomy，Inner Mongolia Agricultural University，Huhhot 010019；
2Center of Agricultural Technology Promotion，Zalantun 162650；
3Center of Agricultural Technology Promotion，Arongqi 162750
Keywords:
Soybean; Irrigation; Water use efficiency (WUE )
PACS:
S565.1
DOI:
10.3969/j.issn.1000-9841.2007.05.011
Abstract:
The effect of irrigation at different growth stages on leaf physiological characteristics and water use efficiency (WUE) in soybean were investigated.Results showed that irrigation at different growth stages had significant effect on soybean yield，and the order was flowering stage (FS)>flowering stage(FS) + pod filling stage(PFS)> podding stage(PS) >pod filling stage(PFS) > CK > branching stage(BS).Irrigation at FS could increase chlorophyll content and net photosynthetic rate (Pn)，while decrease stomatal conductance (Gs) and transpiration rate (Tr) of soybean leaves，so the WUEwas improved.The different phosphorus treatments under water stress at PFS indicated that certain amount of phosphorous (0-0.56 g pot-1) could increase Pnbut reduce the Tr，therefore，the WUE was increased.So it was suggested that irrigating only once at FS in practice.The irrigation amount should be 40 m3667 m-2，and cooperated phosphorus application was suggested.Thus，the photosynthetic characteristics，WUE and yield were improved.

References:

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Last Update: 2014-10-20