气候变化领域集成服务门户(CCPortal): Effects of different tillage practices and nitrogen application rate on carbon dioxide emissions and carbon balance in rain-fed maize crops [不同耕作方法和施氮量对旱作农田土壤CO2排放及碳平衡的影响]

CCPortal

DOI	10.11686/cyxb2020136
	Effects of different tillage practices and nitrogen application rate on carbon dioxide emissions and carbon balance in rain-fed maize crops [不同耕作方法和施氮量对旱作农田土壤CO2排放及碳平衡的影响]
	Qi P.; Wang X.-J.; Yao Y.-M.; Chen X.-L.; Wu J.; Cai L.-Q.
发表日期	2021
ISSN	10045759
起始页码	96
结束页码	106
卷号	30 期号:1
英文摘要	Full-film double furrow sowing technology is one of the main production technologies of dryland maize on the Loess Plateau in recent years. Study of the influence of different tillage methods on soil CO2 emission from dryland maize farmland is highly relevant to understanding of carbon cycling, reducing emissions, and selection of appropriate management measures in farmland systems. This research evaluated the CO2 emission and carbon balance of dryland maize farmland under four tillage methods (subsoiling, no-tillage, rotary tillage and ploughing). combined with two commonly used nitrogen application rates (200 and 300 kg•ha-1) in field experiments. It was found that the variation in soil CO2 emission rate reflected variation in atmospheric temperature. The maximum and minimum values occurred around 12: 00-14: 00 and 4: 00-6: 00, respectively. The soil CO2 emission rate during the growth period showed a trend of initial increase and then decrease with increasing plant maturity. The pattern of variation in each treatment with time was basically the same. The peak soil CO2 emission rate appeared in the stem elongation, head emergence and flowering periods, and then decreased to the lowest rate in the ripening period. The total carbon emission and carbon emission efficiency over the entire growth period were significantly higher in the ploughing treatment than other treatments (P<0.05), and there were no significant differences (P>0.05) between the other tillage methods. The total soil CO2 emission at a fertilizer application rate of 300 kg•ha-1 was significantly higher than 200 kg•ha-1 (P<0.05). The net ecosystem productivity and carbon sequestration potential of the maize field cropping system were significantly higher under subsoiling than other treatments (P<0.05), but the two nitrogen rates did not differ significantly (P>0.05). In conclusion, based on these results, the combination of subsoiling and the traditional nitrogen application rate (200 kg N•ha-1) is the preferred management mode for maize in the Loess Plateau arid region, from the perspective of carbon sequestration and emission reduction. © 2021, Editorial Office of Acta Prataculturae Sinica. All rights reserved.
英文关键词	Carbon balance; Maize field; Nitrogen fertilizer; Soil CO2 emission; Tillage methods
来源期刊	Acta Prataculturae Sinica
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/177265
作者单位	College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou, 730070, China; Gansu Provincial Key Laboratory of Arid Land Crop Science, Gansu Agricultural University, Lanzhou, 730070, China; Gansu Engineering Research Center for Agriculture Water-saving, Lanzhou, 730070, China; College of Management, Gansu Agricultural University, Lanzhou, 730070, China; Third Institute Geological and Mineral Exploration of Gansu provincial Bureau of Geology and Mineral Resources, Lanzhou, 730050, China
推荐引用方式 GB/T 7714	Qi P.,Wang X.-J.,Yao Y.-M.,等. Effects of different tillage practices and nitrogen application rate on carbon dioxide emissions and carbon balance in rain-fed maize crops [不同耕作方法和施氮量对旱作农田土壤CO2排放及碳平衡的影响][J],2021,30(1).
APA	Qi P.,Wang X.-J.,Yao Y.-M.,Chen X.-L.,Wu J.,&Cai L.-Q..(2021).Effects of different tillage practices and nitrogen application rate on carbon dioxide emissions and carbon balance in rain-fed maize crops [不同耕作方法和施氮量对旱作农田土壤CO2排放及碳平衡的影响].Acta Prataculturae Sinica,30(1).
MLA	Qi P.,et al."Effects of different tillage practices and nitrogen application rate on carbon dioxide emissions and carbon balance in rain-fed maize crops [不同耕作方法和施氮量对旱作农田土壤CO2排放及碳平衡的影响]".Acta Prataculturae Sinica 30.1(2021).