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Title:: EFFECTS OF WATER- NITROGEN COUPLING ON THEGROWTH AND DEVELOPMENT OF SOYBEANⅡ. Effects of Water-Nitrogen Coupling on the Physiological Characteristics of Soybean

Author(s):: Han Xiaozeng¹; 2　Pei Yufeng¹; 2Wang Shouyu¹　Zu Wei²Liu LijuN²; (1. Northeast Institute of Geography and Agricultural Ecology , CAS , Harbin ,150040 ;2. Northeast Agricultural University , Harbin, 150030)

Keywords:: Soybean ; Water-nitrogen coupling ; Photosynthetic rate ; Stomatal conductance ; Transpirationrate

PACS:: -

DOI:: 10.11861/j.issn.1000-9841.2006.02.0103

Abstract:: 　 A pot experiment was conducted for two years to evaluate the effects of water-nitrogen couplingon the physiological characteristics of soybean at different stages of the growth and development. The re-sults showed that :1)under the condition of over-waterlogging the photosynthetic rate (P)of soybean de-clined significantly and turned to be more seriously at later stage , at the stages of R 2 ～ R 4 period and thestomatal conductance (C) decreased as well , but the transpiration rate (E)increased accordingly. The in-creased application of N-fertilizer would give rise to the decline of P , C and E , which explained the yieldloses of soybean ;2)when exposed to the abundant water condition , the P , C and E increased significant-ly , but they were on the way to decreasing with the growing of soybean plants ,the increased application ofN-fertilizer would lead to the increase of P ,C and E , which account for the high yield of soybean ;3)thecondition of a little drought made the P ,C and E declined at different stages, especially. during R 2 ～ R 5 pe-riod, increasing the application of N-fertilizer could readjust the effects of water on P and increase C , E andenhance the adaptability to adversity stress;4)over-drought treatment caused the P , C and E decline sosignificantly that the effects of water on the physiological characteristics of soybean could not be readjustby increasing the application of N-fertilizer. When suitable soil moisture resumed, the application of N-fer-tilizer would affect and further restore the growth speed of soybean in the wake of drought stress. In expo-sure to waterlogging or drought stress at V 6 stage, soybean would suffer by different degrees at later sta-ges of the growth and development though on the way to decreasing gradually. Comparatively , R 2 ～ R 4were the crucial stages that accounted for the yield, and water-fertilizer measures should be conducted.Conclusively , under different water conditions regulating the application of N-fertilizer could ensure thegrow th and development of soybean and reduced the yield loses. Under the waterlogging condition, in-creasing N-fertilizer is harmful to soybean, but it will be useless under the drought condition. IncreasingN-fertilizer applying is helpful to soybean under the condition of abundance , fitting and a little drought.

References:

1　梁宗锁, 李新有, 康绍忠. 节水灌溉条件下夏玉米气孔导度与光合速度的关系[ J] . 干旱地区农业研究, 1996, 14(2):101 - 105

2　赵海祯, 梁哲军, 齐宏立, 等. 不同时期水肥耦合对旱地小麦光合特性和产量的影响[ J] . 华北农学报, 2002, 17(增刊):61 - 65

3　张秋英, 刘晓冰, 金剑, 等. 水肥耦合对玉米光合特性及产量的影响[ J] . 玉米科学, 2001, 9(2):64- 67

4　韩晓增, 乔云发, 张秋英, 等. 不同土壤水分条件对大豆产量的影响[ J] . 大豆科学, 2003, 22:(4)

5　朱桂杰, 蒋高明, 郝乃斌, 等. Relationship between ecophysio-logical features and grain yield in different soy bean varieties[ J] .Acta Botanica Sinica. 2002, 44(6):725- 730

6　 Sorte , N. V. Effect of waterlogging on soybean at critical growthstages[ J] . Journal of Soils and Crops, 1995, 5(2):141 - 144

7　裴宇峰, 韩晓增, 祖伟, 等. 水氮耦合对大豆生长发育的影响, Ⅰ.水氮耦合对大豆产量和品质的影响[ J] . 大豆科学, 2005, 24:(2)106 - 111

EFFECTS OF WATER- NITROGEN COUPLING ON THEGROWTH AND DEVELOPMENT OF SOYBEANⅡ. Effects of Water-Nitrogen Coupling on the Physiological Characteristics of Soybean(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

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