Soil carbon sequestration, plant nutrients and biological activities affected by organic farming system in tea (<i>Camellia sinensis</i>(L.) O. Kuntze) fields

Wang, Han; Xu, Jianming; Wei, Kang; Shi, Ruan-Zhi; Ma, Lei

doi:10.1080/00380768.2013.833857

Cited by 20 publications

(12 citation statements)

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“…On the other hand, applying legume straws may ameliorate soil acidity and Al toxicity in acid tea soils by releasing the base cation and increasing the base cation saturation of the soil [19]. The application of organic fertilizers is rich in soil microbial biomass-C and has a significant effect on improving its content in tea plants [20]. Thus, soil microbial biomass carbon, nitrogen, and phosphorus contents increased significantly under the influence of straw mulching and organic fertilizer treatment [21].…”

Section: Introductionmentioning

confidence: 99%

Restoration of Long-Term Monoculture Degraded Tea Orchard by Green and Goat Manures Applications System

et al. 2019

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Tea is an economic shrubby plant in tropical and subtropical regions of the world. To obtain high yield in tea cultivation, chemical fertilizer application rates have generally been used. However, a large quantity of chemical fertilizer application in a long-term continuously ratooned and monoculture tea orchard can inevitably lead to soil acidification and a decline in fertility. Therefore, the restoration of soil fertility and the sustainable development of tea planting by organic ways are critical for the tea industry. In this study, field trials were conducted in the tea orchard that was continuously ratooned and mono-cultured for 20 years. Nitrogen fertilizer (NF), Laredo soybeans green manure (LF), and goat manure (GM) treatments were applied to restore optimum acidity, soil fertility, microbial activity, and the community structure of a long-term continuously monoculture tea orchard. This paper investigated that the pH value was increased from 4.23 to 4.32 in GM and LF, respectively. Similarly, the content of exchangeable acidity (EA) was decreased by 1.21 and 1.46 cmol·kg−1 in GM and LF, respectively. Available nutrient results indicated that the content of NH4+-N was increased by 3.96, 4.38, NO3−-N by 1.07, 2.16, AP by 3.46, 6.86, AK by 0.26, 0.3 mg kg−1 in GM and LF treatments, respectively. Enzyme analysis revealed that the activity of urease and sucrase was promoted by 7.98 mg·g−1·24 h−1 and 6.77 mg·g−1·24 h−1, respectively, in LF treatment. Likewise, the activity of acid phosphatase and polyphenol oxidase was sharply increased by 2.3 mg·g−1 h−1 and 63.07 mg·g−1 h−1 in LF treatments. Additionally, the activity of urease, sucrase, acidic phosphatase, polyphenol oxidase, and peroxidase were also significantly increased by applying GM treatments. Meanwhile, LF and GM treatments significantly improved soil microbial biomass as well as low weight organic acid content in degraded tea rhizosphere. Furthermore, high throughput sequence results illustrated that the relative abundance of Rhizobiaceae and Bradyrhizobiaceae families increased in LF and GM treatments, respectively, which are mostly a kind of nitrogen fixer and plant growth promoting bacteria. Taken together, the physiological traits of the new sprouts and the biochemical components of new tea leaves were also significantly improved by GM and LF treatments. From this study, it is concluded that LF and GM are good agriculture management practices, which promote plant growth, yield, and nutrient availability by maintaining and improving pH, enhancing available nutrients status, improving the secretion of low molecular weight organic acids, and balancing the microbial community structure in the long-term mono-cultured tea orchard.

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Section: Introductionmentioning

confidence: 99%

Restoration of Long-Term Monoculture Degraded Tea Orchard by Green and Goat Manures Applications System

et al. 2019

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“…As tea production in China has intensified to meet market demands over the past decades, public concerns over the negative impacts of conventional synthetic nitrogen fertilizers application in tea plantations on human health and environmental quality have also increased (Pimentel et al, 2005;Han et al, 2013b). These concerns have led to increased grower interest in organically fertilized tea plantations, and by 2011 approximately 45 000 ha of tea fields were under organic fertilization in China (Han et al, 2013b).…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…These concerns have led to increased grower interest in organically fertilized tea plantations, and by 2011 approximately 45 000 ha of tea fields were under organic fertilization in China (Han et al, 2013b). Furthermore, the conversion of conventional synthetic nitrogen fertilization to organic fertilizer practice in tea plantations has been identified as a feasible measure in the aspects of promoting soil carbon sequestration and ameliorating soil pH (Han et al, 2013b;Wang et al, 2014). On the other hand, organic fertilization systems have been shown to substantially affect N 2 O emissions compared with conventional management practices, but the influence can be either stimulatory (Akiyama and Tsuruta, 2003a, b;Syväsalo et al, 2006) or marginal and even inhibitory (Akiyama and Tsuruta, 2003b;Burger et al, 2005;Petersen et al, 2006;Kramer et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

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Organically fertilized tea plantation stimulates N<sub>2</sub>O emissions and lowers NO fluxes in subtropical China

et al. 2015

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Abstract. Tea plantations are rapidly expanding in China and other countries in the tropical and subtropical zones, but so far there are very few studies including direct measurements of nitrogenous gas fluxes from tea plantations. On the basis of 2-year field measurements from 2012 to 2014, we provided an insight into the assessment of annual nitrous oxide (N 2 O) and nitric oxide (NO) fluxes from Chinese subtropical tea plantations under three practices of conventional urea application, alternative oilcake incorporation and no nitrogen fertilization. Clearly, the N 2 O and NO fluxes exhibited large intra-and inter-annual variations, and furthermore, their temporal variability could be well described by a combination of soil environmental factors including soil mineral N, water-filled pore space and temperature, based on a revised "hole-in-the-pipe" model. Averaged over a 2-year study, annual background N 2 O and NO emissions were approximately 4.0 and 1.6 kg N ha −1 yr −1 , respectively. Compared to no nitrogen fertilization, both urea and oilcake application significantly stimulated annual N 2 O and NO emissions, amounting to 14.4-32.7 kg N 2 O-N ha −1 yr −1 and at least 12.3-19.4 kg NO-N ha −1 yr −1 , respectively. In comparison with conventional urea treatment, on average, the application of organic fertilizer significantly increased N 2 O emission by 71 % but decreased NO emission by 22 %. Although the magnitude of N 2 O and NO fluxes was substantially influenced by the source of N, the annual direct emission factors of N fertilizer were estimated to be 2.8-5.9, 2.7-4.0 and 6.8-9.1 % for N 2 O, NO and N 2 O+NO, respectively, which are significantly higher than those defaults for global upland croplands. This indicated that the rarely determined N 2 O and NO formation appeared to be a significant pathway in the nitrogen cycle of tea plantations, which are a potential source of national nitrogenous gases inventory.

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“…Theexpected economic profi t from the agriculture of caffeine plants is around 20,000 USD per year and hectare (5). Planting C. sinensis for tea leafs production have similar importance in the agriculture as plantingcaffeine plants (6). Caffeine has an eminent role in pharmacology as well.…”

Section: Introductionmentioning

confidence: 99%

The perspective of caffeine and caffeine derived compounds in therapy

Pohanka¹

2015

BLL

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Caffeine (1,3,7-trimethylxanthine) is a plant secondary metabolite with a signifi cant impact on multiple processes and regulatory pathways in the body. Though major part of the population meets caffeine via coffee, tea or chocolate, it has also an important role in pharmacology and it is used as a supplementary substance in medicaments. Currently, the ability of caffeine to ameliorate some neurodegenerative disorders is proved in some studies. This review describes basic data about caffeine including toxicity, pharmacokinetics, biological mechanism of the action, and metabolism. Beside this, promising applications of caffeine, new medicaments and derivatives are discussed. Relevant papers and inventions are depicted in the manuscript. Caffeine is a pharmacologically promising substance that deserves big consideration in the current research and development. The compound has several reasons to be an object of scientifi c interest and to be used for pharmacology purposes. Despite an extensive research for a long time, no signifi cantly negative effects on human health were proved hence caffeine can be considered as a completely safe compound. The recent data about amelioration of neurodegenerative and other disorders are promising and deserving more work on the issue. ARTICLE HIGHLIGHTS Caffeine is a purine alkaloid from plants and it has a broad use in current pharmacology. Caffeine is a competitive antagonist of neurotransmitter adenosine on adenosine receptors. The substance is added as a supplementary to drugs and food. Besides interfering on adenosine receptors, caffeine interacts with acetylcholinesterase, monoamine oxidase, phosphodiesterase, ryanodine receptors and others. Current research is devoted to the role of caffeine in neurodegenerative diseases and immunity alteration. New chemical compounds based on caffeine moiety are prepared(Tab. 4, Fig. 6, Ref. 149).

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Soil carbon sequestration, plant nutrients and biological activities affected by organic farming system in tea (Camellia sinensis(L.) O. Kuntze) fields

Cited by 20 publications

References 52 publications

Restoration of Long-Term Monoculture Degraded Tea Orchard by Green and Goat Manures Applications System

Restoration of Long-Term Monoculture Degraded Tea Orchard by Green and Goat Manures Applications System

Organically fertilized tea plantation stimulates N<sub>2</sub>O emissions and lowers NO fluxes in subtropical China

The perspective of caffeine and caffeine derived compounds in therapy

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Soil carbon sequestration, plant nutrients and biological activities affected by organic farming system in tea (Camellia sinensis(L.) O. Kuntze) fields

Cited by 20 publications

References 52 publications

Restoration of Long-Term Monoculture Degraded Tea Orchard by Green and Goat Manures Applications System

Restoration of Long-Term Monoculture Degraded Tea Orchard by Green and Goat Manures Applications System

Organically fertilized tea plantation stimulates N&lt;sub&gt;2&lt;/sub&gt;O emissions and lowers NO fluxes in subtropical China

The perspective of caffeine and caffeine derived compounds in therapy

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Organically fertilized tea plantation stimulates N<sub>2</sub>O emissions and lowers NO fluxes in subtropical China