Soil Respiration During a Soybean-Growing Season

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Soil Respiration During a Soybean-Growing Season

机译：大豆生长季节的土壤呼吸

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Soil respiration induced by soybean cultivation over its entire growing season and the factors influencing soil respiration were investigated to examine the seasonal pattern of soil respiration induced by soybean cultivation, explore soybean growth and photosynthesis on soil respiration, and determine the temperature dependence on soil respiration. Soil respiration in a pot experiment with and without soybean plants was sampled using the static chamber method and measured using gas chromatograph. Air temperature was a dominant factor controlling soil respiration rate in unplanted soil. Additionally,rhizosphere respiration comprised 62% to 98% of the soil respiration rate in the soybean-planted soil varying with the soybean growth stages. Harvesting aerial parts of soybean plant caused an immediate drop in the soil respiration rate at that stage. After harvesting the aerial parts of the soybean plant, a highly significant correlation between soil respiration rate and air temperature was found at the flowering stage (P ＜ 0.01), the pod stage (P ＜ 0.01), and the seed-filling stage(P ＜ 0.05). Thus, rhizosphere respiration during the soybean-growing period not only made a great contribution to soil respiration, but also determined the seasonal variation pattern of the soil respiration rate.

机译：研究了大豆栽培在整个生长季节引起的土壤呼吸作用以及影响土壤呼吸的因素，以研究大豆栽培引起的土壤呼吸的季节模式，探索大豆生长和土壤呼吸的光合作用，并确定温度对土壤呼吸的依赖性。使用静态室法对有或没有大豆植物的盆栽试验中的土壤呼吸进行采样，并使用气相色谱仪进行测量。空气温度是控制未种植土壤中土壤呼吸速率的主要因素。此外，随着大豆生长阶段的不同，根际呼吸占大豆种植土壤中土壤呼吸速率的62％至98％。在此阶段，收获大豆植物的地上部分导致土壤呼吸速率立即下降。收获大豆植物的地上部分后，在开花期（P ＜0.01），荚果期（P ＜0.01）和种子填充期（P ＜0.05）。因此，大豆生长期的根际呼吸不仅对土壤呼吸有重要贡献，而且决定了土壤呼吸速率的季节变化规律。

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《土壤圈（英文版）》 |2006年第2期|192-200|共9页
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作者单位

State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences,Nanjing 210008 China;

School of Resources and Environmental Science, Hubei University, Wuhan 430062 China;

School of Environmental Studies, China University of Geosciences, Wuahn 430074 China;

State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences,Nanjing 210008 China;

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收录信息中国科学引文数据库(CSCD);
原文格式 PDF
正文语种 chi
中图分类农业基础科学;
关键词
photosynthesis; rhizosphere; soil respiration; soybean plant; temperature effect;

机译：光合作用;根际;土壤呼吸;大豆植株;温度效应;

Soil Respiration During a Soybean-Growing Season

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