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Preferential Alternatives to Returning All Crop Residues as Biochar to the Crop Field? A Three-Source 13C and 14C Partitioning Study
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2019-09-03 , DOI: 10.1021/acs.jafc.9b03323 Xiaowen Ji 1, 2 , Evgeny Abakumov 2 , Xianchuan Xie 1 , Dongyang Wei 3 , Rong Tang 4 , Jue Ding 5 , Yu Cheng 1 , Jie Chen 6
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2019-09-03 , DOI: 10.1021/acs.jafc.9b03323 Xiaowen Ji 1, 2 , Evgeny Abakumov 2 , Xianchuan Xie 1 , Dongyang Wei 3 , Rong Tang 4 , Jue Ding 5 , Yu Cheng 1 , Jie Chen 6
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The simultaneous effects of biochar on soil organic matter (SOM, C4) and sweet potato (SP) residue (Ipomoea batatas, C3) mineralization were studied over 180 days via 13C and 14C isotopic label partitioning. Upon concomitant SP residue addition, biochar mineralization decreased by 11% of the total added biochar-C. Compared to positive priming effects induced by biochar amendment alone on SOM (0.46 mg C g–1 soil) at 180 days, amendment solely with SP residues induced significantly larger effects (1.5 mg C g–1 soil). Combination biochar and SP residue addition reduced SOM mineralization by 20.5% and increased SP residue mineralization by 10.1%. Biochar addition caused preferential uptake of SP residues over SOM by microbes. Thus, the lower priming effects on SOM and CO2 emission induced by biochar amendment with or without SP residues compared to that from SP residue addition alone may result in crop residues being partly pyrolyzed to biochar in the cropland.
中文翻译：
将所有作物残渣作为生物炭返回作物田的优惠替代方案？三源13C和14C分区研究
通过13 C和14 C同位素标记分配研究了180天内生物炭对土壤有机质（SOM，C4）和甘薯（SP）残留物（Ipomoea batatas，C3）矿化的同时影响。加入SP残留物后，生物炭矿化减少了总生物炭C的11％。与单独生物炭改良剂对SOM（0.46 mg C g –1土壤）在180天时诱导的积极启动作用相比，仅用SP残留物进行改良就诱导了更大的作用（1.5 mg C g -1泥）。结合使用生物炭和SP残留物可将SOM矿化减少20.5％，并将SP残留物矿化增加10.1％。生物炭的添加导致微生物比SP优先吸收SP残基。因此，与单独添加SP残留物相比，通过添加或不添加SP残留物进行生物炭改良对SOM和CO 2排放的引发作用较低，这可能导致农作物残留物被部分热解为农田中的生物炭。
更新日期：2019-09-03
中文翻译：
将所有作物残渣作为生物炭返回作物田的优惠替代方案？三源13C和14C分区研究
通过13 C和14 C同位素标记分配研究了180天内生物炭对土壤有机质（SOM，C4）和甘薯（SP）残留物（Ipomoea batatas，C3）矿化的同时影响。加入SP残留物后，生物炭矿化减少了总生物炭C的11％。与单独生物炭改良剂对SOM（0.46 mg C g –1土壤）在180天时诱导的积极启动作用相比，仅用SP残留物进行改良就诱导了更大的作用（1.5 mg C g -1泥）。结合使用生物炭和SP残留物可将SOM矿化减少20.5％，并将SP残留物矿化增加10.1％。生物炭的添加导致微生物比SP优先吸收SP残基。因此，与单独添加SP残留物相比，通过添加或不添加SP残留物进行生物炭改良对SOM和CO 2排放的引发作用较低，这可能导致农作物残留物被部分热解为农田中的生物炭。
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