The impacts of the water quality of the inflow water from tea fields on irrigation reservoir ecosystems

Nakasone, Hideo; Yamamoto, Tomohisa

doi:10.1007/s10333-004-0039-2

Cited by 8 publications

(7 citation statements)

References 3 publications

(3 reference statements)

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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]. Akiyama et al [8] have reported that the N2O emission from tea fields in Japan was up to 2.82%±1.80% of input N, which is four times higher than that of upland fields, at 0.62%±0.48% of input N and nine times greater than paddy fields, at 0.31%±0.31%.…”

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.

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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

View full text Add to dashboard Cite

show abstract

“…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]. Akiyama et al [8] have reported that the N 2 O emission from tea fields in Japan was up to 2.82% ± 1.80% of input N, which is four times higher than that of upland fields, at 0.62% ± 0.48% of input N and nine times greater than paddy fields, at 0.31% ± 0.31%.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2017

View full text Add to dashboard Cite

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 minimize the concentration of nitrates in the effluents, various processes are under development for conversion of nitrate to nitrogen. Nitrate pollution is reported from paddy as well as tea cultivation where the nitrate leaching causes acidification of soil and increases the concentration of nitrate level in ground water . Nitrate mobility or leaching is responsible for contaminating water bodies.…”

Section: Introductionmentioning

confidence: 99%

Microbial community in packed bed bioreactor involved in nitrate remediation from low level radioactive waste

Mishra

Jain

Thakur

et al. 2013

J. Basic Microbiol.

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Nitrate is the second largest contaminant of agriculture soil after pesticides. It also is a major pollutant from nuclear and metallurgical operations. Conventional methods for nitrate removal suffers from high cost and complexity leaving bioremediation as a viable alternative strategy. A pilot plant of 2.5 m(3)/day capacity has been functioning since 2005 based on microbial consortia treating actual effluent from nuclear power plant having pH of 7-8.5 (optimum) with N:C ratio of 1:1.7. The maximum biodegradable nitrate concentration of 3000 ppm could be reduced to below permissible limit (44.2 ppm) within 24 h in presence of sodium acetate as carbon source. Culture independent analysis (16S rDNA based) revealed clones having closest identity with uncultured bacterium, Pseudomonas stutzeri and Azoarcus sp. The existence of dissimilatory pathway of nitrate reduction in the community DNA is indicated by presence of nirS and nirK gene. Though the microbial mass was developed using municipal sewage, absence of Mycobacterium sp was confirmed using PCR. The understanding of the molecular identification of the consortium would help in developing the preservation strategy of the microbial mass for replication and perpetuation of the system.

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The impacts of the water quality of the inflow water from tea fields on irrigation reservoir ecosystems

Cited by 8 publications

References 3 publications

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

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

Microbial community in packed bed bioreactor involved in nitrate remediation from low level radioactive waste

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