NDLI: The fate of urea nitrogen applied to a vegetable crop rotation system

Content Provider	Springer Nature Link
Author	Ding, Hong Li, Shiqing Zhang, Yushu Hu, Xiaoxia Zheng, Xiangzhou Zhang, Jing Weng, Boqi Chen, Deli
Copyright Year	2015
Abstract	To investigate the fate of urea nitrogen (N) applied to vegetable fields, three N rates, N0 (0 kg N/ha), N1(225 or 240 kg N/ha) and N2 (450 or 480 kg N/ha) were applied to a rotation system. Nitrogen fertilizer recovery (NFR), N residue in soil, and N losses were measured in situ. Higher N application rates resulted in lower NFR, and increased N residues in soil and losses. The NFR, Chinese cabbage, and eggplant were different in the N1 and N2 groups (P < 0.01). The ratios of N fertilizer residue at 0–60 cm deep ranged from 30.2 to 41.1 % (N1), and 33.1 to 57.7 % (N2). The N loss ratios were only 6.6 % (N1) and 11.9 % (N2), because of the lower precipitation rates and temperatures characteristic of its growing season; meanwhile, N losses were 31.1 and 37.4 % in cayenne pepper, and 24.1 and 29.2 % in eggplants in the N1 and N2 treatments, respectively. The main pathways of N loss were leaching, followed by gaseous losses; these were major pathways of N loss in seasons with lower precipitation rates. NH3 volatilization was correlated with soil temperature (P < 0.01), and N2O emissions were correlated with soil moisture in the N1 treatment and with soil NH4 +-N concentration in the N2 treatment (P < 0.01). Denitrification rates were correlated with soil moisture in the N0 and N1 treatments, and with NO3 −-N content in the N2 treatment (P < 0.01). Finally, loss due to runoff was correlated with precipitation (P < 0.01).
Starting Page	279
Ending Page	292
Page Count	14
File Format	PDF
ISSN	13851314
Journal	Nutrient Cycling in Agroecosystems
Volume Number	103
Issue Number	3
e-ISSN	15730867
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-10-14
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nitrogen fate Ammonia volatilization N2O emission Leaching Runoff Denitrification Urea nitrogen fertilizer Agriculture
Content Type	Text
Resource Type	Article
Subject	Agronomy and Crop Science Soil Science

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