Nitrous Oxide Emission from Organic Fertilizer and Controlled Release Fertilizer in Tea Fields

Meihua Deng, Mudan Hou, Naoko Ohkama-Ohtsu, Tadashi Yokoyama, Haruo Tanaka, Kenta Nakajima, Ryosuke Omata and Sonoko Dorothea Bellingrath-Kimura
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Meihua Deng: College of environmental and resource science, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
Mudan Hou: Graduate School of Agriculture, Department of Biological Production Science, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
Naoko Ohkama-Ohtsu: Institute of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
Tadashi Yokoyama: Institute of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
Haruo Tanaka: Institute of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
Kenta Nakajima: Green Tea Laboratory, Saitama Prefectural Agriculture and Forestry Research Center, 244-2 Kamiyaganuki, Iruma, Saitama 358-0042, Japan
Ryosuke Omata: Green Tea Laboratory, Saitama Prefectural Agriculture and Forestry Research Center, 244-2 Kamiyaganuki, Iruma, Saitama 358-0042, Japan
Sonoko Dorothea Bellingrath-Kimura: Leibniz Centre for Agricultural Landscape Research, Institute of Land Use Systems, Eberswalder str. 84, 15374 Muencheberg, Germany

Agriculture, 2017, vol. 7, issue 3, 1-12

Abstract: A field experiment was conducted for two years in the Green Tea Laboratory of Saitama Prefectural Agriculture and Forestry Research Center, Iruma, Saitama, Japan from March 2014 to December 2015. Controlled release fertilizers (CRF) or organic fertilizers (ORG), which are a mixture of chicken manure and oil cake, were applied with the amount of 450 kg·N·ha ?1 ·year ?1 in 2014 and 397 kg·N·ha ?1 ·year ?1 in 2015. Nitrous oxide (N 2 O) emissions from soil in green tea fields were measured by the closed chamber method. The results showed that CRF has significantly lower N 2 O compared to ORG. The cumulative N 2 O emissions from CRF accounted for 51% of N 2 O emissions from ORG fields and 138% of control with no fertilizer treatment. The N 2 O flux from the row was higher than that under the canopy, since fertilizer was applied on the row. However, the total emission from the area between the rows was lower than that under the canopy because the area ratio between the row and canopy was 1:5.

Keywords: controlled release fertilizer (CRF); organic fertilizer (ORG); nitrous oxide; row; canopy (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2017
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