施肥对小麦叶片光合特性的影响

doi:10.3321/j.issn:1000-7091.2007.02.028

摘要/Abstract

摘要： 为了揭示肥料对小麦光合速率的影响效应，进而提高小麦的光合生产力，以小麦品种莱农0245为研究对象，对比分析了施肥和不施肥2种处理下，灌浆期旗叶的光合速率、蒸腾速率、气孔导度以及水分利用率对光强响应特征。结果表明：正常施肥时小麦的光合速率、蒸腾速率、气孔导度、水分利用率都随光强的增强而逐渐增大。不施肥条件下，蒸腾速率和气孔导度随光强的增强而逐渐增大，而在高光强(>1200μmol/(m²·s))下，会产生光抑制现象，光合速率降低，这也造成水分利用率的降低。正常施肥条件下的光合速率、蒸腾速率、气孔导度均高于不施肥条件下。因此，适量施肥可以明显改善小麦的光合能力。

关键词: 小麦, 施肥, 光合作用, 蒸腾作用, 气孔导度, 水分利用率

Abstract: In order to reveal the effect of fertilization to photosynthetic rate, and increase the photosynthetic productivity of wheat, we took the wheat variety Lainong 0245 as the object of study. The response characteristics of photosynthetic rate, transpiration rate, stomatal conductance and water use efficiency to light intensity were researched and analyzed during the filling-grain period of flag leaves. It indicated that under normal fertilization conditions, photosynthetic rate, transpiration rate, stomatal conductance and water use efficiency all gradually increased with the light intensity enhancement. Under no fertilization condition, transpiration rate and stomatal conductance gradually increased with the light intensity enhancement. Yet, when light intensity exceeded 1200 μmol/(m²·s), it was appeared photoinhibition, photosynthetic rate and water use efficiency decreased. Photosynthetic rate, transpiration rate, stomatal conductance under normal fertilization was higher than those under no fertilization. So, fertilization would remarkably improve photosynthesis of the wheat.

Key words: Wheat, Fertilization, Photosynthesis, Transpiration, Stomatal conductance, Water use efficiency

中图分类号:

S512.01

王建林, 房全孝, 李举华, 唐海琴. 施肥对小麦叶片光合特性的影响[J]. 华北农学报, 2007, 22(2): 115-118. doi: 10.3321/j.issn:1000-7091.2007.02.028.

WANG Jian-lin, FANG Quan-xiao, LI Ju-hua, TANG Hai-qin. Effect of Photosynthetic Characteristic of Wheat Under Different Fertilization[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2007, 22(2): 115-118. doi: 10.3321/j.issn:1000-7091.2007.02.028.

http://www.hbnxb.net/CN/Y2007/V22/I2/115

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