小麥葉片和冠層尺度氣體交換模型關鍵參數(shù)的季節(jié)變化特征

doi:10.12306/2023jms.0082

首頁 > 過刊瀏覽>2024年第44卷第1期 >166-175. DOI:10.12306/2023jms.0082

小麥葉片和冠層尺度氣體交換模型關鍵參數(shù)的季節(jié)變化特征
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                        10.12306/2023jms.0082
                    
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中圖分類號:S513
基金項目:國家自然科學基金資助項目(42230611;42005097;42175192);博士后科研基金資助項目(BSH2022001);甘肅省自然科學基金資助項目(22JR5RA060)

Seasonal variation of key model parameters for gas exchange between wheat and atmosphere at leaf and canopy scales

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本文從葉片和冠層尺度入手,采用手持式光合儀和渦動相關法,分析確定C3作物春小麥和冬小麥氣體交換模型關鍵參數(shù)隨季節(jié)變化的特征。結果表明:春小麥葉片尺度最大羧化速率和最大電子傳遞速率在生育末期快速減小,其他階段差異不顯著,但二者之比隨發(fā)育期變化相對穩(wěn)定,均值為2.2;春小麥生長季葉片氣孔導度模型斜率在9~11間變動,均值為9.7。冬小麥冠層尺度最大羧化速率和最大電子傳遞速率隨發(fā)育期呈拋物線變化,但二者之比相對穩(wěn)定,均值為1.43;冬小麥冠層導度模型斜率在不同年份不同季節(jié)變化無明顯規(guī)律,整個生育期圍繞均值12波動。本研究論證了表征作物光合能力的參數(shù)隨生育期變化以及氣孔導度模型斜率相對穩(wěn)定的特征?？蔀殛憵庀嗷プ饔眠^程分析以及生態(tài)系統(tǒng)碳-水循環(huán)模擬提供參數(shù)化依據(jù)。

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Starting from the scales of leaves and canopies,this article uses handheld photosynthetic instruments and eddy correlation methods to analyze and determine the seasonal variation characteristics of key parameters in the gas exchange models of C3 crops for spring and winter wheat.Results show that the maximum carboxylation rate and maximum electron transfer rate at the leaf scale of spring wheat decrease rapidly in the late growth stage,with no significant differences in other stages.However,the ratio of the two remained relatively stable with the development period,with an average of 2.2.The slope of the stomatal conductance model for spring wheat leaves during the growing season varies between 9 and 11,with a mean of 9.7.The maximum carboxylation rate and maximum electron transfer rate at the canopy scale of winter wheat exhibit parabolic changes with the development period,but the ratio of the two is relatively stable,with an average of 1.43;the slope of the winter wheat canopy conductance model shows no significant variation in different years and seasons,and fluctuates around the mean of 12 throughout the entire growth period.In this study,the seasonal variation of the parameters that characterize the photosynthetic capacity of crops is demonstrated,and the slope of the stomatal conductance model is relatively stable.This study demonstrates the variation of parameters that characterize crop photosynthetic capacity with growth period and the relatively stable slope of stomatal conductance model.It can provide parameterized basis for the analysis of land atmosphere interaction process and simulation of ecosystem carbon water cycle.

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趙福年,劉江,張強,張良,王潤元,王鶴齡,侯金亮.小麥葉片和冠層尺度氣體交換模型關鍵參數(shù)的季節(jié)變化特征.氣象科學,2024,44(1):166-175 ZHAO Funian, LIU Jiang, ZHANG Qiang, ZHANG Liang, WANG Runyuan, WANG Heling, HOU Jinliang. Seasonal variation of key model parameters for gas exchange between wheat and atmosphere at leaf and canopy scales. Journal of the Meteorological Sciences,2024,44(1):166-175

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收稿日期:2023-11-06
最后修改日期:2023-12-05
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在線發(fā)布日期: 2024-03-13
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