Author(s)

Yuzhou Jiang ^1,2, Qingli Liu^1,2, Zhihong Li^1,2, Yungui Zhang^1,2, Yan Zou^3,*, Jingwei Zhu³, Junxiong Shi ³, Heng Zhang³

Affiliation(s)

^1. Institute of Agricultuwal Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China;

^2. Key Laboratory of Eco-environment and Leaf Tobacco Quality, CNTC, Beijing 100081, China;

^3. Tobacco Science Institute of Guizhou Province, Guiyang 550000, China.

Corresponding Author

Yan Zou, email: seeyouagainzy@foxmail.com

ABSTRACT

The experiment was conducted to explore the impact of different environmental factors on nitrous oxide (N₂O) emission flux after application of fertilizer. An experiment was conducted in 2016 to determine the N₂O emissions in maize yellow soil. There were three treatments: No fertilizer + Crop rotation for comparison (CK); inorganic fertilizer + Crop rotation (CR); inorganic fertilizer + Continuous cropping (CC). Therefore, the experiment was designed to study the variation features of N₂O emissions in maize-growing season and analyze the impact of soil moisture, temperature and nitrate nitrogen content on N₂O emissions after application of Crop rotation and Continuous cropping. The results indicated that: N₂O emissions reached two peaks in maize-growing season, which mainly occurred in 1-11 days after application of Crop rotation and Continuous cropping; the cumulated amount of N₂O emissions within 15 days after application of Crop rotation and Continuous cropping accounted for 22.16%-38.23% of the cumulated amount of N₂O emissions during the whole growing season and total emission amount during growth period. Meanwhile, the average N₂O emission flux of the three treatment process could be ranked as CC＞CR＞CK, which shall be measured as 0.056, 0.010 and 0.007 mg·m-2·h-1 respectively; The total N₂O emissions of soil after application of Continuous cropping were improved for 7 times respectively as compared with single application of Crop rotation. According to relevant analysis, N₂O emission flux of maize yellow soil was mainly related with the nitrate nitrogen content (P<0.05) in farmland, from which it could be concluded that N₂O emission in maize yellow soil was free from any influence of local soil moisture content, air temperature or soil temperature. Moreover, N₂O emissions of maize yellow soil were increased after application of Continuous cropping. Therefore, an important way to reduce N₂O emissions of maize yellow soil was to control the application reasonable Crop rotation.

KEYWORDS

N₂O Emission; C/N Ratio; Yellow Cornfield; China; Environmental Factors.

CITE THIS PAPER

Jiang Yuzhou, Liu Qingli, Li Zhihong, Zhang Yungui, Zou Yan, Zhu Jingwei, Shi Junxiong, Zhang Heng. Nitrous oxide emissions and its influencing factors inmaize field. Eurasia Journal of Science and Technology. 2019, 1(1): 26-31.

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