稻草还田下非稻季持续淹水对稻季CH4和CO2排放的影响
稻草还田和非稻季持续淹水是我国最重要的稻田管理方式之一，此种管理方式下稻田碳排放并不清楚。本研究以江汉平原中稻一冬闲制度为对象，探讨稻草还田耦合非稻季持续淹水对稻季碳排放的影响，为准确评估稻田温室气体排放提供数据支撑和理论支持。结果表明，在稻草秸秆全量覆盖还田下，非稻季自然排水比持续淹水显著降低稻季CH。累积排放量，稻季第一次排水晒刚之前CH4排放占总排放量的80％以上；非稻季持续淹水使稻季CO2累积排放量比自然排水稍有降低，CO2排放主要集中在第一次排水晒田之后，占总排放量的60％左右。非稻季淹水降低稻季土壤NO3-N、NH4^-N和DOC浓度以及10cm土层土壤Eh值，但使乙酸浓度升高，这...
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| Published in | 农业资源与环境学报 Vol. 34; no. 2; pp. 145 - 152 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
农业农村部环境保护科研监测所
10.03.2017
中国农业生态环境保护协会 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 2095-6819 2095-6819 |
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| Abstract | 稻草还田和非稻季持续淹水是我国最重要的稻田管理方式之一，此种管理方式下稻田碳排放并不清楚。本研究以江汉平原中稻一冬闲制度为对象，探讨稻草还田耦合非稻季持续淹水对稻季碳排放的影响，为准确评估稻田温室气体排放提供数据支撑和理论支持。结果表明，在稻草秸秆全量覆盖还田下，非稻季自然排水比持续淹水显著降低稻季CH。累积排放量，稻季第一次排水晒刚之前CH4排放占总排放量的80％以上；非稻季持续淹水使稻季CO2累积排放量比自然排水稍有降低，CO2排放主要集中在第一次排水晒田之后，占总排放量的60％左右。非稻季淹水降低稻季土壤NO3-N、NH4^-N和DOC浓度以及10cm土层土壤Eh值，但使乙酸浓度升高，这可能是稻草还田耦合非稻季淹水导致CH。排放量增加的主要原因。 |
|---|---|
| AbstractList | 稻草还田和非稻季持续淹水是我国最重要的稻田管理方式之一，此种管理方式下稻田碳排放并不清楚。本研究以江汉平原中稻一冬闲制度为对象，探讨稻草还田耦合非稻季持续淹水对稻季碳排放的影响，为准确评估稻田温室气体排放提供数据支撑和理论支持。结果表明，在稻草秸秆全量覆盖还田下，非稻季自然排水比持续淹水显著降低稻季CH。累积排放量，稻季第一次排水晒刚之前CH4排放占总排放量的80％以上；非稻季持续淹水使稻季CO2累积排放量比自然排水稍有降低，CO2排放主要集中在第一次排水晒田之后，占总排放量的60％左右。非稻季淹水降低稻季土壤NO3-N、NH4^-N和DOC浓度以及10cm土层土壤Eh值，但使乙酸浓度升高，这可能是稻草还田耦合非稻季淹水导致CH。排放量增加的主要原因。 稻草还田和非稻季持续淹水是我国最重要的稻田管理方式之一，此种管理方式下稻田碳排放并不清楚。本研究以江汉平原中稻-冬闲制度为对象，探讨稻草还田耦合非稻季持续淹水对稻季碳排放的影响，为准确评估稻田温室气体排放提供数据支撑和理论支持。结果表明，在稻草秸秆全量覆盖还田下，非稻季自然排水比持续淹水显著降低稻季CH4累积排放量，稻季第一次排水晒田之前CH4排放占总排放量的80%以上；非稻季持续淹水使稻季CO2累积排放量比自然排水稍有降低，CO2排放主要集中在第一次排水晒田之后，占总排放量的60%左右。非稻季淹水降低稻季土壤NO3--N、NH4+-N和DOC浓度以及10 cm土层土壤Eh值，但使乙酸浓度升高，这可能是稻草还田耦合非稻季淹水导致CH4排放量增加的主要原因。 |
| Author | 徐祥玉 张敏敏 彭成林 侣国涵 徐大兵 袁家富 |
| AuthorAffiliation | 湖北省农业科学院植保土肥研究所,湖北武汉430064 农业部潜江农业环境与耕地保育科学观测实验站,湖北潜江433100 |
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| Discipline | Agriculture |
| DocumentTitleAlternate | Effects of Continuous Flooding in No-rice Growing Season on CH4 and CO2 Emissions of Rice Growing Season with Straw Returning |
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| EndPage | 152 |
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| Keywords | 稻草还田 甲烷 持续淹水 二氧化碳 |
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| Notes | Straw returning is a straw utilization pattern which is widely promoted in China. It can increase the soil organic carbon and fertility, but straw returning also increase the CH4 and CO2 emissions. The effects of continuous flooding in no rice growing season on CH4 and CO2 emission in rice season with straw returning is not clear. This study was conducted with two different water managements in no rice growing season, one was the middle rice - natural drainage（ RD ） and another was the middle rice - continuous flooding（ RW ）. The aim was to investigate the characteristic of CH4 and CO2 emission flux in rice season under different water management with straw returning, and to provide data support for accurate assessment of paddy greenhouse gas emissions. The results showed that RD significantly reduced the CH4 accumulation emission flux in rice growing season compared with the RW, and 80% total CH4 emission flux in rice growing season was emission before the first drainage whether RD or RW. RW could cutdown th |
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| PublicationTitle | 农业资源与环境学报 |
| PublicationTitleAlternate | Agro-Environment and Development |
| PublicationYear | 2017 |
| Publisher | 农业农村部环境保护科研监测所 中国农业生态环境保护协会 |
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| SubjectTerms | 二氧化碳 持续淹水 甲烷 稻草还田 |
| Title | 稻草还田下非稻季持续淹水对稻季CH4和CO2排放的影响 |
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