Mitigation of nitrous oxide emissions from paddy soil under conventional and no-till practices using nitrification inhibitors during the winter wheat-growing season
Mitigation of nitrous oxide emissions from paddy soil under conventional and no-till practices using nitrification inhibitors during the winter wheat-growing season
复制标题
冬小麦生长季节使用硝化抑制剂减少常规免耕稻田一氧化二氮排放
DOI：
10.1007/s00374-012-0753-7
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发表时间：
2013-08-01
影响因子：
6.5
通讯作者：
Xiong, Zhengqin
中科院分区：
文献类型：
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作者：
Ma, Yuchun;Sun, Liying;Xiong, Zhengqin
与传统耕作农业相比，免耕技术对一氧化二氮 (N2O) 排放的净影响不一致且难以量化。本研究评估了常规耕作和免耕耕作下小麦生长季节稻田的 N2O 排放量和产量，以及使用双氰胺和氯化吡啶 (CP) 作为硝化抑制剂 (NI) 缓解 N2O 演变的情况。耕作方式和NI 均显着（P<0.01）影响N2O 累积排放量和产量。与传统耕作相比，免耕耕作的累积 N2O 排放量增加了 8.2-19.3%，并且大多数日子里充满水的孔隙空间更高。与免耕相比，常规耕作平均提高了小麦产量 6.0%，并减少了产量规模的 N2O-N 排放量 44.5%。这两个国家平均使小麦产量提高了 9.7%，并减少了产量规模的 N2O-N 排放量 67.7%。 CP 处理产生了最高的产量和最低的 N2O 排放量，从而导致两种耕作方式下产量规模的 N2O–N 排放量最低（0.15–0.17 kg N2O–N t−1 谷物产量）。
The net effect of no-till techniques on nitrous oxide (N2O) emissions is inconsistent and poorly quantified in comparison to conventionally tilled farming. This study assesses N2O emissions and yields from paddy fields during the wheat-growing season under conventional and no-till farming, as well as mitigation of N2O evolution using dicyandiamide and chlorinated pyridine (CP) as nitrification inhibitor (NI). Both tillage practices and NIs significantly (P< 0.01) affected cumulative N2O emissions and yields. In comparison to conventional tillage, the cumulative N2O emissions under no-till farming were increased by 8.2–19.3 % and the water-filled pore space was higher on most days. Relative to no-tillage, the conventional tillage averagely increased the wheat yield by 6.0 % and reduced yield-scaled N2O–N emission by 44.5 %. The two NIs averagely increased the wheat yield by 9.7 % and reduced yield-scaled N2O–N emission by 67.7 %. The treatment with CP produced the highest yield with the lowest N2O emissions, thus leading to the lowest yield-scaled N2O–N emission (0.15–0.17 kg N2O–N t−1grain yield) under both tillage practices.