| 生物炭及与秸秆联用对我国热带地区稻田土壤CH4和N2O的影响 |
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| 引用本文： | 袁新生,赵炎,唐瑞杰,胡天怡,朱启林,汤水荣,伍延正,孟磊. 生物炭及与秸秆联用对我国热带地区稻田土壤CH4和N2O的影响[J]. 热带生物学报, 2022, 13(3): 300-308. DOI: 10.15886/j.cnki.rdswxb.2022.03.014 |
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| 作者姓名： | 袁新生 赵炎 唐瑞杰 胡天怡 朱启林 汤水荣 伍延正 孟磊 |
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| 作者单位： | 海南大学 热带作物学院，海口 570228 |
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| 基金项目： | 海南省自然科学基金高层次人才项目;海南省自然科学基金青年基金项目;国家自然科学基金 |
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| 摘 要： | 为了研究添加生物炭、秸秆、生物炭与秸秆联用对热带地区稻田温室气体排放的影响，通过盆栽培养试验，设常规施肥(CK)、常规施肥配施40 t·hm-2椰糠生物炭(B)、常规施肥配施3 t·hm-2水稻秸秆(C)、常规施肥配施40 t·hm-2椰糠生物炭加3 t·hm-2水稻秸秆(B+C)4个处理，采用静态箱-气相色谱法监测整个水稻种植季CH4和N2O排放，估算全球增温潜势(GWP)并测定收获后作物产量。结果表明，相比CK处理，B、C和B+C处理的N2O累计排放量分别降低21.43%、21.89%和14.77%;B处理的CH4累计排放量降低38.21%，而C和B+C处理的CH4累计排放量分别增加14.63%和19.85%;C和B+C处理显著增加GWP，而B处理显著降低GWP；单独添加生物炭减排效果最佳。与CK相比，B、C处理的单株水稻产量分别增加5.22%、8.76%，而B+C处理的单株水稻产量降低18.39%(P<0.05)。因此，在我国热带地区稻田，单独...
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| 关 键 词： | 生物炭 温室气体 热带地区 秸秆还田 |
| 收稿时间： | 2022-03-07 |
Effect of biochar and its combined application with straw on CH4 and N2O in paddy field soils in tropical China |
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| YUAN Xinsheng,ZHAO Yan,TANG Ruijie,HU Tianyi,ZHU Qilin,TANG Shuirong,WU Yanzheng,MENG Lei. Effect of biochar and its combined application with straw on CH4 and N2O in paddy field soils in tropical China[J]. Journal of Tropical Biology, 2022, 13(3): 300-308. DOI: 10.15886/j.cnki.rdswxb.2022.03.014 |
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| Authors: | YUAN Xinsheng ZHAO Yan TANG Ruijie HU Tianyi ZHU Qilin TANG Shuirong WU Yanzheng MENG Lei |
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| Affiliation: | College of Tropical Crops, Hainan University, Haikou 570228, China |
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| Abstract: | Effective measures of greenhouse gas emission mitigation in paddy field in tropical China are still unclear. In order to explore the effect of biochar, straw amendment and the mixture of biochar and straw on greenhouse gas emission in paddy fields in tropical China, a pot experiment was conducted, and four treatments were arranged, including conventional fertilizer application as control (CK), conventional fertilizer application plus 40 t·hm?2 of biochar (B), conventional fertilizer application plus 3 t·hm?2 of rice straw (C), conventional fertilizer application plus 40 t·hm?2 of biochar + 3 t·hm?2 of rice straw (B+C). Static chamber-gas chromatography was used to monitor CH4 and N2O emissions for estimation of global warming potential (GWP), and the crop yield was measured after harvest. The results showed that compared with CK Treatments B, C and B+C significantly reduced the cumulative N2O emissions by 21.43%, 21.89%, and 14.77%, respectively, but only Treatment B significantly reduced the cumulative emission of CH4 by 38.21%, while Treatments C and B+C significantly increased the cumulative emission of CH4 by 14.63% and 19.85%, respectively. Meanwhile, Treatments C and B+C significantly increased GWP, while Treatment B significantly decreased GWP (P < 0.05), which indicated that Treatment B had better greenhouse gas emission mitigation effect as compared to the other treatments. Treatments B and C significantly increased rice yield per plant by 5.22% and 8.76%, respectively, while Treatment B+C significantly decreased rice yield per plant by 18.39%. Thus, application of 40 t·hm?2 of biochar in the paddy fields in tropical China is recommended to achieve greenhouse gas emission reduction and yield increase. |
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