Effects of Controlled-release Nitrogen Fertilizer on Tea Yield, Quality, Nitrogen Use Efficiency and Economic Benefit

MA Lifeng; SU Kongwu; LI Jinlan; SHI Yuanzhi; YI Xiaoyun; FANG Li; RUAN Jianyun

doi:10.13305/j.cnki.jts.2015.04.007

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Journal of Tea Science ›› 2015, Vol. 35 ›› Issue (4) : 354-362. DOI: 10.13305/j.cnki.jts.2015.04.007

Effects of Controlled-release Nitrogen Fertilizer on Tea Yield, Quality, Nitrogen Use Efficiency and Economic Benefit

MA Lifeng^1,2, SU Kongwu³, LI Jinlan³, SHI Yuanzhi¹, YI Xiaoyun¹, FANG Li¹, RUAN Jianyun^1,*

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Abstract

The study was carried out to investigate the effects of different N fertilization input on soil inorganic N, tea yield, quality components, N use efficiency, uptake of N, P, and other mineral nutrients and financial economic benefit. Results indicated that soil inorganic N concentration varied less and relatively more stable in controlled-release N fertilizer (CRF) or CRF blending with conventional N fertilizer (CF) than CF, but there was no statistical difference (P>0.05) among three N treatments. In comparison with CF, tea yields in CRF and CRF blending with CF were increased by 7.5% and 15.2%, respectively. The tea quality components, including free amino acid, tea polyphenol and the TP/AA ratio showed no statistical difference (P>0.05) among three N treatments. CRF or CRF blending with CF promoted tea plants to uptake N, P and other mineral nutrients, and improved N use efficiency in young shoots. Comparing CF and CRF, the NUE increment rates in CRF blending with CF were 5.38% and 2.39%, respectively. The PNE in CRF blending with CF was 1.16 kg·kg^-1 higher than CF, and 0.57 kg·kg^-1 higher than CRF. Compared to CF, the total net income increment in CRF and CRF blending with CF were 9.3 thousand yuan RMB and 20.1 thousand yuan RMB per hectare, respectively. It was concluded that CRF blending with CF has significant promoting effect on tea yields and economic benefit.

Key words

controlled-release nitrogen fertilizer / economic benefit / mineral nutrients / nitrogen use efficiency / tea yield, tea quality components / tea plant [Camell ia sinensis (L.)]

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MA Lifeng, SU Kongwu, LI Jinlan, SHI Yuanzhi, YI Xiaoyun, FANG Li, RUAN Jianyun. Effects of Controlled-release Nitrogen Fertilizer on Tea Yield, Quality, Nitrogen Use Efficiency and Economic Benefit[J]. Journal of Tea Science. 2015, 35(4): 354-362 https://doi.org/10.13305/j.cnki.jts.2015.04.007

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