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当前位置: 首页 > 文章 > 设施菜田夏季闷棚对还田秸秆矿化和CO_2排放的影响 安徽农业科学 2020 (2) 81-84+92
Position: Home > Articles > Effect of Stuffy Shed on Mineralization and CO_2 Emission of Returning Straw in Greenhouse Vegetable Field in Summer Journal of Anhui Agricultural Sciences 2020 (2) 81-84+92

设施菜田夏季闷棚对还田秸秆矿化和CO_2排放的影响

作  者：
余亚琳;胡静;樊兆博;王敬国;林杉
单  位：
中国农业大学资源与环境学院
关键词：
设施蔬菜;高温闷棚;CO_2排放通量;秸秆还田;矿化
摘  要：
[目的]研究设施蔬菜夏季闷棚对还田秸秆矿化和CO_2排放的影响。[方法]设计二因素试验,主因素为灌溉方式(传统畦灌施肥、滴灌施肥),副因素为秸秆还田(0、3 500 kg/hm~2),通过测定闷棚前、闷棚期和闷棚后CO_2日排放通量,以及6月1日、11月4日2 d内每3 h的CO_2排放通量,总结闷棚对还田秸秆矿化的影响。[结果]夏季08:00—09:00和冬季17:00—18:00测定的土壤CO_2排放通量与其间CO_2日均排放通量之间不存在显著差异,且二者呈极显著线性正相关关系。闷棚期,CO_2日均排放通量显著高于闷棚前和闷棚后;尤其是秸秆还田后,闷棚期CO_2排放通量急剧增加,是不添加秸秆处理的2倍。尽管闷棚期间CO_2累积排放量显著低于闷棚后生长季;然而,闷棚期来自于秸秆的CO_2累积排放量和排放率则显著高于闷棚后生长季。[结论]闷棚期高温高湿的环境条件导致闷棚前加入的秸秆迅速矿化,不利于土壤有机碳积累和后续蔬菜作物光合作用对CO_2的高需求。
译  名：
Effect of Stuffy Shed on Mineralization and CO_2 Emission of Returning Straw in Greenhouse Vegetable Field in Summer
作  者：
YU Ya-lin;HU Jing;FAN Zhao-bo;College of Resources and Environmental Sciences, China Agricultural University;
关键词：
Greenhouse vegetable;;High temperature stuffy shed;;CO_2 emission flux;;Straw returning;;Mineralization
摘  要：
[Objective] To study the effect of stuffy shed on the mineralization and CO_2 emission of returning straw in greenhouse vegetable in summer.[Method] A two-factor field experiment was carried out,the main factor was the irrigation method(conventional flooding irrigation and drip irrigation),the secondary factor was straw returning(0,3 500 kg/hm~2).By measuring the daily CO_2 emission fluxes before, during and after the stuffy period, as well as the CO_2 emission fluxes per 3 h on June 1 and November 4, to summarize the effect of stuffy shed on the mineralization of returning straw.[Result]There was no significant difference between the daily average CO_2 emission flux measured at 08:00-09:00 in summer or at 17:00-18:00 in winter and the CO_2 daily average emission flux,and there was a very significant linear positive correlation between the two.During the stuffy period, the average daily CO_2 emission flux was significantly higher than that before and after the stuffy period;especially, after straw was returned to the soil, CO_2 emission flux in the stuffy period increased sharply, which was twice as much as that without straw addition. Moreover, although the CO_2 cumulative emissions during the stuffy period were significantly lower than the growth season after the stuffy;however, the CO_2 cumulative emissions and emission rate of straw during the stuffy period were significantly higher than that in the growth season after the stuffy period. [Conclusion]The high temperature and high humidity during the stuffy period lead to the rapid mineralization and CO_2 emission than that before and after stuffy, which is not conducive to the accumulation of soil organic carbon and the high demand on CO_2 by subsequent photosynthesis of vegetable rapid growth.

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