Preprint Article Version 1 This version is not peer-reviewed

A Comparison of Nitrogen Transfer and Transformation in Traditional Farming and Rice-Duck Farming System by N15 Tracer Method

Version 1 : Received: 20 September 2018 / Approved: 20 September 2018 / Online: 20 September 2018 (13:09:32 CEST)

A peer-reviewed article of this Preprint also exists.

EBISSA, T.M.; Yang, B.; Guan, Y.; Tan, B.; Chen, P.; Wang, L.; Magwanga, R.O.; Zheng, X. A Comparison of Nitrogen Transfer and Transformation in Traditional Farming and the Rice–Duck Farming System by 15N Tracer Method. Agronomy 2018, 8, 289. EBISSA, T.M.; Yang, B.; Guan, Y.; Tan, B.; Chen, P.; Wang, L.; Magwanga, R.O.; Zheng, X. A Comparison of Nitrogen Transfer and Transformation in Traditional Farming and the Rice–Duck Farming System by 15N Tracer Method. Agronomy 2018, 8, 289.

Journal reference: Agronomy 2018, 8, 289
DOI: 10.3390/agronomy8120289

Abstract

A field experiment was conducted in Ninghe, Tianjin, China, using 15N isotope method to evaluate the application of organic fertilizer on N distribution patterns of labelled and unlabeled N fertilizer, ammonium sulfate -15N uptake by rice, N use efficiency (NUE), and the fate of (15NH4)2SO4 applied. The experiment included eight treatments: CK-N (control + no-duck), CK-D (control + ducks), CF-N (chemical fertilizer + no-ducks), CF-D (chemical fertilizer + ducks), CM-N (chemical fertilizer + organic fertilizer + no-ducks), CM-D (chemical fertilizer + organic fertilizer + ducks), CD-N (chemical fertilizer 30% off + organic fertilizer + no-ducks), and CD-D (chemical fertilizer 30% off + organic fertilizer + ducks). The results showed that the application of organic fertilizer whether CM or CD significantly increased N and P concentrations over control (CK) and chemical fertilizer (CF). Moreover, no-significant differences were found in 15N fresh grain and husk concentration. Both organs ranged of 14.2-14.4 g kg-1 and 6.2-6.3 g kg-1, respectively. N derived from the fertilizer and soil significantly affected fresh grain compared to fresh husk. However, N uptake and N use efficiency did not show any differences. We concluded that organic fertilizer has a significant influence on rice growth and promote crop productivity.

Subject Areas

Nitrogen; transfer; transformation; N uptake; nitrogen use efficiency

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