Nitrous oxide production from strongly acid tea field soils

Tokuda, Shinichi; Hayatsu, Masahito

doi:10.1080/00380768.2000.10409149

Cited by 44 publications

(16 citation statements)

References 26 publications

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“…Organic farms rely heavily on soil biological activity and crop rotation with legume crops to provide N to plants Tu et al 2006;Fließbach et al 2007;Moeskops et al 2010). Tea is a leaf harvested mono perennial crop and large amounts of N fertilizer are applied in conventional tea fields (Tokuda and Hayatsu 2000;Han and Li 2002). However, chemical fertilizer is not permitted in organic tea fields.…”

Section: Soil Total and Available Nutrientsmentioning

confidence: 99%

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

Wang

Wei

et al. 2013

Soil Science and Plant Nutrition

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There is growing interest in investigations into soil carbon (C) sequestration, plant nutrients and biological activities in organic farming since it is regarded as a farming system that could contribute to climate mitigation and sustainable agriculture. However, most comparative studies have focused on annual crops or farming systems with crop rotations, and only a few on perennial crops without rotations, e.g. tea (Camellia sinensis (L.) O. Kuntze). In this study, we selected five pairs of tea fields under organic and conventional farming systems in eastern China to study the effect of organic farming on soil C sequestration, plant nutrients and biological activities in tea fields. Soil organic C, total nitrogen (N), phosphorus (P), potassium (K) and magnesium (Mg), available nutrients, microbial biomass, N mineralization and nitrification were compared. Soil pH, organic C and total N contents were higher in organic tea fields. Soil microbial biomass C, N and P, and their ratios in organic C, total N and P, respectively, net N mineralization and nitrification rates were significantly higher in organic fields in most of the comparative pairs of fields. Concentrations of soil organic C and microbial biomass C were higher in the soils with longer periods under organic management. However, inorganic N, available P and K concentrations were generally lower in the organic fields. No significant differences were found in available calcium (Ca), Mg, sodium (Na), iron (Fe), manganese (Mn), copper (Cu) and zinc (Zn) concentrations between the two farming systems. These findings suggest that organic farming could promote soil C sequestration and microbial biomass size and activities in tea fields, but more N-rich organic fertilizers, and natural P and K fertilizers, will be required for sustainable organic tea production in the long term.

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Section: Soil Total and Available Nutrientsmentioning

confidence: 99%

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

Wang

Wei

et al. 2013

Soil Science and Plant Nutrition

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“…To obtain good tea leaf yield and good quality tea, tea fields generally accept a large amount of nitrogen (N) fertilizer in Japan [2] and the N application rate has reached a range of 450-1000 kg·N·ha −1 ·year −1 [3][4][5]. The high amount of N application rate has led to a large N loss with nitrate (NO 3 − ) leaching, as well as nitrogen dioxide (N 2 O) emission [6,7].…”

Section: Introductionmentioning

confidence: 99%

Nitrous Oxide Emission from Organic Fertilizer and Controlled Release Fertilizer in Tea Fields

et al. 2017

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A field experiment was conducted for two years in the Green Tea Laboratory of Saitama Prefectural Agriculture and Forestry Research Center, Iruma, Saitama, Japan from March 2014 to December 2015. Controlled release fertilizers (CRF) or organic fertilizers (ORG), which are a mixture of chicken manure and oil cake, were applied with the amount of 450 kg·N·ha −1 ·year −1 in 2014 and 397 kg·N·ha −1 ·year −1 in 2015. Nitrous oxide (N 2 O) emissions from soil in green tea fields were measured by the closed chamber method. The results showed that CRF has significantly lower N 2 O compared to ORG. The cumulative N 2 O emissions from CRF accounted for 51% of N 2 O emissions from ORG fields and 138% of control with no fertilizer treatment. The N 2 O flux from the row was higher than that under the canopy, since fertilizer was applied on the row. However, the total emission from the area between the rows was lower than that under the canopy because the area ratio between the row and canopy was 1:5.

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“…To obtain good tea leaf yield and good quality tea, tea fields generally accept a large amount of nitrogen (N) fertilizer in Japan [2] and the N application rate has reached a range of 450-1000 kg·N·ha −1 ·year −1 [3][4][5]. The high amount of N application rate has led to a large N loss with nitrate (NO3 − ) leaching, as well as nitrogen dioxide (N2O) emission [6,7].…”

Section: Introductionmentioning

confidence: 99%

Nitrous Oxide Emission from Organic Fertilizer and Controlled Release Fertilizer in Tea Fields

Deng¹,

Ming²,

Ohkama‐Ohtsu³

et al. 2017

Preprint

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Abstract:A field experiment was conducted for two years in the Green Tea Laboratory of Saitama Prefectural Agriculture and Forestry Research Center, Iruma, Saitama, Japan from March 2014 to December 2015. Controlled release fertilizers (CRF) or organic fertilizers (ORG), which are a mixture of chicken manure and oil cake, were applied with the amount of 450 kg·N·ha −1 ·year −1 in 2014 and 397 kg·N·ha −1 ·year −1 in 2015. Nitrous oxide (N2O) emissions from soil in green tea fields were measured by the closed chamber method. The results showed that CRF has significantly lower N2O compared to ORG. The cumulative N2O emissions from CRF accounted for 51% of N2O emissions from ORG fields and 138% of control with no fertilizer treatment. The N2O flux from the row was higher than that under the canopy, since fertilizer was applied on the row. However, the total emission from the area between the rows was lower than that under the canopy because the area ratio between the row and canopy was 1:5.

show abstract

Nitrous oxide production from strongly acid tea field soils

Cited by 44 publications

References 26 publications

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

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

Nitrous Oxide Emission from Organic Fertilizer and Controlled Release Fertilizer in Tea Fields

Nitrous Oxide Emission from Organic Fertilizer and Controlled Release Fertilizer in Tea Fields

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