Nitrogen Fertilization in Soil Affects Physiological Characteristics and Quality of Green Tea Leaves

Xiao, Fang; Zai-qiang, Yang; Huang, Haijing; Yang, Fei; Zhu, L.D.; Han, Dong

doi:10.21273/hortsci12897-18

Cited by 14 publications

(14 citation statements)

References 17 publications

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“…Ma et al (2021) in the Zhejiang province of China also reported a significant increase in the yield of harvested shoots with application of N fertilisers [29], with yields reaching a plateau at an application rate of 367 kg N ha −1 year −1 . In a short-term pot experiment, Xiao et al (2018) reported a yield response of tea up to a level of 3.88 g N (kg soil) −1 [23]. The potential tea yield in a given location is primarily dependent on the climate conditions [28].…”

Section: Resultsmentioning

confidence: 99%

“…All units were converted into standard S.I. units with the exception of Xiao et al (2018) for which insufficient data were available [23]. Overall, our approach allowed us to synthesise and identify the need for N, current practices adopted by tea plantations, their impacts, and consequences for the environment, as well as any practices that can help in mitigation highlighted in the literature.…”

Section: Methodsmentioning

confidence: 99%

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Identifying Sustainable Nitrogen Management Practices for Tea Plantations

2022

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Tea (Camellia sinensis L.) is the most widely consumed beverage in the world. It is mostly grown in the tropics with a heavy dependence on mineral nitrogen (N) fertilisers to maintain high yields while minimising the areas under cultivation. However, N is often applied in excess of crop requirements, resulting in substantial adverse environmental impacts. We conducted a systematic literature review, synthesising the findings from 48 studies to assess the impacts of excessive N application on soil health, and identify sustainable, alternative forms of N management. High N applications lead to soil acidification, N leaching to surface and groundwater, and the emission of greenhouse gases including nitrous oxide (N2O). We identified a range of alternative N management practices, the use of organic fertilisers, a mixture of organic and inorganic fertilisers, controlled release fertilisers, nitrification inhibitors and soil amendments including biochar. While many practices result in reduced N loading or mitigate some adverse impacts, major trade-offs include lower yields, and in some instances increased N2O emissions. Practices are also frequently trialled in isolation, meaning there may be a missed opportunity from assessing synergistic effects. Moreover, adoption rates of alternatives are low due to a lack of knowledge amongst farmers, and/or financial barriers. The use of site-specific management practices which incorporate local factors (for example climate, tea variety, irrigation requirements, site slope, and fertiliser type) are therefore recommended to improve sustainable N management practices in the long term.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Identifying Sustainable Nitrogen Management Practices for Tea Plantations

2022

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“…Growth-promoting hormones, ZR, IAA, and GA 1+3 are bene cial for plant growth, but their mechanisms are different in different plant organs (Ciura and Kruk 2018). N application was reported to increase ZT content of the leaves of Green tea, while the concentration of ABA, a growth inhibiting hormone, decreased with N application (Xiao et al 2018). The reported differences on the effect of N on hormones in different plant organs may be attributed to differences in plant species and organ types.…”

Section: Discussionmentioning

confidence: 99%

“…Similarly, the result of studies on the effect endogenous hormones on the allometric growth of plant organs differ considerably. Xiao et al (2018) reported that IAA, GA, and ZT (the same function as ZR) promoted the growth of tea stems and leaves, while ABA inhibited the growth of tea stems and leaves. The content of IAA and ZT increased with root growth, while the content of GA decreased and ABA remained unchanged (Li et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Nitrogen addition regulates allometric growth by changing the distribution patterns of endogenous hormones in different organs of Pinus tabuliformis

Peng¹,

Wang²,

Wei³

et al. 2021

Preprint

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Background: The mechanisms by which nitrogen (N) affects the allometric growth of plant organs by influencing the distribution of different hormones in plant organs remain unclear. Therefore, this study aimed to examine the effect of soil N levels on soil properties, the hormonal activities and growth parameters of Pinus tabuliformis Carr. Methods: Seedlings of P. tabuliformis were subjected to 0, 3, 6, 12 g of N m-2 year-1. Growth parameter and hormone activity data (trans-zeatin riboside (ZR), gibberellin (GA1+3), indole acetic acid (IAA), abscisic acid (ABA)) in leaf, stem, total root, coarse root (diameters >2 mm), fine root (1-2 mm) and finest root (0-1 mm) biomass were measured and analysed. Results: The results showed that N addition increased the growth of the leaves; stems; total roots; and coarse, fine, and finest roots of the seedlings, but decreased the ratio of underground to aboveground growth. Additionally, N addition increased the ZR content in stems, while decreasing the ABA content in leaves and whole roots and the GA1+3 content in whole roots, but IAA content was not significantly influenced by N addition. Furthermore, the hormones examined significantly influenced the growth of the leaves, stems, roots, and the coarse, fine, and finest roots. Conclusions: N addition affected the trans-zeatin riboside, gibberellin, indole acetic acid, and abscisic acid content in the various organs examined, which influenced the growth of the seedlings. Our research will provide an important reference for forestland governance and forest systems management under global atmospheric N deposition.

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“…Incorporation of N fertilizer enriches the formation and accumulation of free amino acids [ 10 , 11 ] while increases or decreases the concentration of polyphenol [ 12 ] in tea shoots. Xiao et al [ 13 ] demonstrated that N incorporation remarkably increased the caffeine concentration, while significantly decreased the concentration of soluble sugars in tea shoots [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of reduced N-fertilizer application on foliar chemicals and functional qualities of tea plants under Toxoptera aurantii infestation

Pokharel

Zhong

et al. 2022

BMC Plant Biol

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Background The tea aphid, Toxoptera aurantii (Boyer de Fonscolombe) is a polyphagous pest predominant in tea orchards and has become the most pernicious pest deteriorating tea quality. Nitrogen (N) is essential to plant growth improvement, and it can significantly impact plant defensive ability against aphid infestation. This study was designed to quantify the influence of reduced N-fertilizer application on foliar chemicals and functional quality parameters of tea plants against the infestation of T. aurantii. In this study, the tea seedlings (cv. Longjing43) were applied with normal level (NL) of N-fertilizer (240 kg N ha−1) along with reduced N-fertilizer levels (70%NL and 50%NL), and with and without T. aurantii infestation. Results The results showed that N-fertilizer application significantly affected plant biomass and photosynthetic indexes, foliar soluble nutrients and polyphenols, tea catechins, caffeine, essential amino acids, volatile organic compounds of tea seedlings, and the population dynamics of T. aurantii. Compared with the normal N-fertilizer level, the reduced N-fertilizer application (70%NL and 50%NL) significantly decreased all the foliar functional quality components of tea seedlings without aphid infestation, while these components were increased in tea seedlings with aphid infestation. Moreover, the transcript expression levels of foliar functional genes (including CsTCS, CsTs1, and CsGT1) were significantly higher in the NL, and significantly lower in the 50%NL for tea seedlings without aphid infestation, while the transcript expression levels were significantly higher in 50%NL in aphid inoculated tea seedlings. Conclusion The results demonstrated that the reduced N-fertilizer application could enhance foliar chemicals and functional quality parameters of tea plants especially with T. aurantii infestation, which can relieve soil nitrogen pressure and reduce pesticide use for control of tea aphid infestation in tea plantations.

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Nitrogen Fertilization in Soil Affects Physiological Characteristics and Quality of Green Tea Leaves

Cited by 14 publications

References 17 publications

Identifying Sustainable Nitrogen Management Practices for Tea Plantations

Identifying Sustainable Nitrogen Management Practices for Tea Plantations

Nitrogen addition regulates allometric growth by changing the distribution patterns of endogenous hormones in different organs of Pinus tabuliformis

Influence of reduced N-fertilizer application on foliar chemicals and functional qualities of tea plants under Toxoptera aurantii infestation

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