本文選題：黃土高原　切入點：典型草原　出處：《草業(yè)科學》2016年08期

【摘要】：采用靜態(tài)箱法測定了隴東黃土高原天然草地、栽培草地[紫花苜蓿(Medicago sativa)地]、撂荒地、豬糞和羊糞8月份3種主要溫室氣體的通量,甲烷排放量分別是-290.212、-204.18、-180.14、47.84和33.59mg·(d·m~2)~(-1),CO_2排放值分別是266.99、418.72、947.31、6 110.63和14 771.80mg·(d·m~2)~(-1),N_2O排放值依次為-4.87、-2.56、5.31、1 050.55和1 911.76mg·(d·m~2)~(-1),溫室氣體排放總量分別為-8 395.69、-5 425.62、-2 012.6、568 110.19和310 915.58mgCO_2·(d·m~2)~(-1)。研究區(qū)3種草地土壤表現(xiàn)為碳匯,天然草地碳匯效應最好,糞肥表現(xiàn)為碳源。豬糞和撂荒地土壤的3種溫室氣體通量均與7.5cm土溫線性相關。豬糞和羊糞系統(tǒng)溫室氣體間的排放均呈線性關系。
[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.
【作者單位】： 草地農業(yè)生態(tài)系統(tǒng)國家重點實驗室蘭州大學草地農業(yè)科技學院;
【基金】：國家自然科學基金(31172249) 長江學者和創(chuàng)新團隊發(fā)展計劃(IRT13019) 國家科技支撐計劃課題(2011BAD17B02-03)
【分類號】：S812

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