陇东黄土高原草地与畜粪夏季的温室气体排放

发布时间：2018-03-28 20:23

本文选题：黄土高原　切入点：典型草原　出处：《草业科学》2016年08期

【摘要】：采用静态箱法测定了陇东黄土高原天然草地、栽培草地[紫花苜蓿(Medicago sativa)地]、撂荒地、猪粪和羊粪8月份3种主要温室气体的通量,甲烷排放量分别是-290.212、-204.18、-180.14、47.84和33.59mg·(d·m~2)~(-1),CO_2排放值分别是266.99、418.72、947.31、6 110.63和14 771.80mg·(d·m~2)~(-1),N_2O排放值依次为-4.87、-2.56、5.31、1 050.55和1 911.76mg·(d·m~2)~(-1),温室气体排放总量分别为-8 395.69、-5 425.62、-2 012.6、568 110.19和310 915.58mgCO_2·(d·m~2)~(-1)。研究区3种草地土壤表现为碳汇,天然草地碳汇效应最好,粪肥表现为碳源。猪粪和撂荒地土壤的3种温室气体通量均与7.5cm土温线性相关。猪粪和羊粪系统温室气体间的排放均呈线性关系。
[Abstract]:The fluxes of three main greenhouse gases, natural grassland, cultivated grassland [Medicago sativa land], abandoned land, pig manure and sheep manure in August in Longdong Loess Plateau, were measured by static box method. The emission values of methane were -290.212- 204.18N -180.140.1447.84 and 33.59mg / d m2m2n ~ (-1) respectively 266.99418.72n97.31C _ 6 110.63 and 14 771.80mg / d ~ (-1) N _ 2O emission values were -4.87 ~ 2.56 ~ 5.31 ~ (-1) 050.55 and 1 911.76mg / d ~ (-1) respectively. The total greenhouse gas emissions were -8 395.699-525.62n-2 012.6568 110.19 and 310 915.58mgCO_2 / d ~ (22) ~ (-1) respectively. The results showed that the three grassland soils in the study area showed carbon sink, and the total amount of greenhouse gas emission was -8 395.699-525.62U ~ (-2) 012.6568 110.19 and 310 915.58mgCO_2 / d ~ (22) ~ (-1), respectively, in the three grasslands of the study area. The total amount of greenhouse gas emission was -8 395.699-525.62n-2 012.6568 110.19 and 310 915.58mgCO_2 / d respectively. The carbon sink effect of natural grassland was the best, and manure was carbon source. The three greenhouse gas fluxes of pig manure and abandoned soil were linearly related to 7.5cm soil temperature, and the greenhouse gas emissions of pig manure and sheep manure system were linearly related.
【作者单位】：草地农业生态系统国家重点实验室兰州大学草地农业科技学院;
【基金】：国家自然科学基金(31172249) 长江学者和创新团队发展计划(IRT13019) 国家科技支撑计划课题(2011BAD17B02-03)
【分类号】：S812

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