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首页> 外文期刊>Global change biology bioenergy >Reed canary grass cultivation mitigates greenhouse gas emissions from abandoned peat extraction areas
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Reed canary grass cultivation mitigates greenhouse gas emissions from abandoned peat extraction areas

机译：芦苇金丝雀草栽培减轻了废弃泥炭提取区域的温室气体排放

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We studied the impact of reed canary grass (RCG) cultivation on greenhouse gas emission in the following sites of an abandoned peat extraction area in Estonia: a bare soil (BS) site, a nonfertilized Phalaris (nfP) plot, a fertilized Phalaris (fP) plot, and a natural bog (NB) and a fen meadow (FM) as reference areas. The C balance and global warming potential (GWP) were estimated by measuring COSUB2/SUB, CHSUB4/SUB, and NSUB2/SUBO emissions and aboveground and belowground biomass variations. The high COSUB2/SUB flux from the nfP and fP sites and the low COSUB2/SUB emission from the BS are due to the enhancement of mineralization by plant growth on planted sites and inhibited mineralization by the recalcitrant C of BS. The NB site emitted 24 kg CHSUB4/SUB haSUP?1/SUP yrSUP?1/SUP, whereas the almost zero CHSUB4/SUB emission from the Phalaris plots and the BS site was due to the high S concentration in peat, which probably inhibited methanogenesis. The NSUB2/SUBO flux varied from 0.1 kg on the Phalaris plots and the NB to 2.64 kg NSUB2/SUBO haSUP?1/SUP yrSUP?1/SUP on the FM. The highest yield of RCG was obtained in autumn (13.9 t and 8.0 t dw haSUP?1/SUP on the fP and nfP, respectively). By spring, the biomass yield on the fP and nfP plot was 12.7 and 7.9 t dw haSUP?1/SUP, respectively. The C balance of nfP and fP plots was negative in comparison to the BS (?3322, ?5983, and 2504 kg COSUB2/SUB haSUP?1/SUP yrSUP?1/SUP, respectively). This indicates that the cultivation of RCG transformed them from a net source of C into a net sink of C. The GWP for the fP and nfP sites was ?5981 and ?3885 kg COSUB2/SUB eq haSUP?1/SUP yrSUP?1/SUP, respectively. The BS site had a total GWP of 2544 kg COSUB2/SUB eq haSUP?1/SUP yrSUP?1/SUP.
机译：我们研究了芦苇金丝雀草（RCG）培养对爱沙尼亚的废弃泥炭萃取区的以下几个地点的温室气体排放的影响：裸露的土壤（BS）遗址，一种非受精的兰花（NFP）图，一种受精的兰花（FP ）绘图，以及自然沼泽（Nb）和芬兰草甸（FM）作为参考区域。通过测量CO 2 ，CH 4 ，n 2 o排放和地上，估计C平衡和全球变暖潜力（GWP）估计。生物质变化。来自NFP和FP位点的高CO 2 通量和BS的低CO 2 发射是由于植物生长对种植位点和抑制矿化的矿化通过BS的顽抗C. Nb位点发射24kg Ch 4 ha α1 Yr Δ1，而几乎零ch 4 发射从鸬鹚和BS位点是由于泥炭中的高浓度，这可能抑制了甲烷。 n 2 o通量从氏碱图上的<0.1kg变化，Nb至2.64kg n 2 O ha Δ1 Yr ？1 在fm上。 RCG的最高产量分别在FP和NFP上分别在秋季（13.9吨和8.0吨DW HA 1 / SUP>）获得。通过弹簧，FP和NFP图上的生物质产量分别为12.7和7.9 T DW HA 1 。与BS（α3322，α5983和2504kg co <​​sub> 2 Yr 2 yr Δ1，NFP和FP图的C平衡为阴性为阴性分别为）。这表明RCG的培养从C的净来源转变为C的净汇。FP和NFP站点的GWP是？5981和？3885 kg Co 2 eq ha ？1 Yr ？1 。 BS站点的总GWP为2544kg CO 2 等式Ha 1 Yr Δ1。

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