Changes in gross rates of nitrogen transformations in soil caused by conversion of paddy fields to upland fields

Nishio, Takeshi; Sekiya, H.; Toriyama, K.; Kogano, Kanji

doi:10.1080/00380768.1994.10413304

Cited by 15 publications

(8 citation statements)

References 11 publications

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“…Individual studies report that mineralization increases with soil moisture (Pilbeam et al 1993, Fisk et al 1998, Willison et al 1998b, Jamieson et al 1999, though under saturated conditions, mineralization continues but assimilation is inhibited (Nishio et al 1994). Nitrification may respond positively to increasing soil moisture up to Ϫ0.01 MPa Firestone 1995, Low et al 1997) and then decline as the soil becomes saturated (Breuer et al 2002, Corre et al 2003.…”

Section: Nhmentioning

confidence: 99%

Controls on Nitrogen Cycling in Terrestrial Ecosystems: A Synthetic Analysis of Literature Data

Booth

Stark

Rastetter

2005

Ecological Monographs

927

105

729

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Abstract. Isotope pool dilution studies are increasingly reported in the soils and ecology literature as a means of measuring gross rates of nitrogen (N) mineralization, nitrification, and inorganic N assimilation in soils. We assembled data on soil characteristics and gross rates from 100 studies conducted in forest, shrubland, grassland, and agricultural systems to answer the following questions: What factors appear to be the major drivers for production and consumption of inorganic N as measured by isotope dilution studies? Do rates or the relationships between drivers and rates differ among ecosystem types? Across a wide range of ecosystems, gross N mineralization is positively correlated with microbial biomass and soil C and N concentrations, while soil C:N ratio exerts a negative effect on N mineralization only after adjusting for differences in soil C. Nitrification is a log-linear function of N mineralization, increasing rapidly at low mineralization rates but changing only slightly at high mineralization rates. In contrast, NH 4 ϩ assimilation by soil microbes increases nearly linearly over the full range of mineralization rates. As a result, nitrification is proportionately more important as a fate for NH 4 ϩ at low mineralization rates than at high mineralization rates. Gross nitrification rates show no relationship to soil pH, with some of the fastest nitrification rates occurring below pH 5 in soils with high N mineralization rates. Differences in soil organic matter (SOM) composition and concentration among ecosystem types influence the production and fate of mineralized N. Soil organic matter from grasslands appears to be inherently more productive of ammonium than SOM from wooded sites, and SOM from deciduous forests is more so than SOM in coniferous forests, but differences appear to result primarily from differing C:N ratios of organic matter. Because of the central importance of SOM characteristics and concentrations in regulating rates, soil organic matter depletion in agricultural systems appears to be an important determinant of gross process rates and the proportion of NH 4 ϩ that is nitrified. Addition of 15 N appears to stimulate NH 4 ϩ consumption more than NO 3 Ϫ consumption processes; however, the magnitude of the stimulation may provide useful information regarding the factors limiting microbial N transformations.

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Section: Nhmentioning

confidence: 99%

Controls on Nitrogen Cycling in Terrestrial Ecosystems: A Synthetic Analysis of Literature Data

Booth

Stark

Rastetter

2005

Ecological Monographs

927

105

729

View full text Add to dashboard Cite

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“…Table 3 shows the mineralization rate at each site and layer and Table 4 shows that of literature value (Sugihara et al, 1986;Nishio et al, 1994;Yang et al, 2010). Nishio et al (1994) suggested the mineralization rate of submerged soil was lower than that of non-submerged soil. Similarly, the mineralization rate at St. 1, where sediment was always submerged, was lower than that at St. 2 where sediment was sometimes dry.…”

Section: Results and Discussion Quantities Of N And C In The Sedimentmentioning

confidence: 99%

Characteristics of Decomposition of Nitrogen and Carbon in the Sediments in Agricultural Drainage Canals

Nagai

Hama

Sugiyama

et al. 2014

J. of Wat. ^|^ Envir. Tech.

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Many water quality conservation measures have been implemented in agricultural areas to reduce pollutant loading. However, controlling discharged drainage water enhances sedimentation of suspended solids in drainage canals in those areas. The sediment, which has high concentrations of nitrogen (N) and carbon (C), may release N and C and lower the effect of the conservation measures. In this study, we clarified the characteristics of N and C in the sediment in drainage canals. We have investigated paddy field districts around Lake Biwa and measured N and C contents in the sediment. We also conducted incubation experiment of the sediments sampled in two different paddy field districts. Changes in N and C fractions in the sediments and in the overlying water during the incubation period were analyzed. As a result, concentrations of total N and total organic C in the overlying water of the incubated sediment were respectively about two and three times those of drainage water measured at the study points. Total N flux was 33.0 -41.1 mgN/m 2 /day and total organic C flux was 25.3 -48.4 mgC/m 2 /day. It was indicated that the sediments had enough N and C for determining the water quality of drainage water.

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“…The highest k value for the mix organic matter of groundnut : maize (2:1) from the less than 10 years cassava crops cultivation is 0.098 and from the more than 30 years cassava crops cultivation is 0.0083. The low k value can be assumed come from the low activity of soil microorganisms (Nira and Nishimune, 1993) and it shows poor N mineralization (Nishio et al, 1994). N mineralization measured by double-pool kinetics equation estimates mineralization rate of fast and slow pools.…”

Section: Resultsmentioning

confidence: 99%

Comparison of two kinetics models for estimating N mineralization affected by different quality of organic matter in Typic Hapludults

Wijanarko

Purwanto

2016

J.Degrade.Min.Land Manage.

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N availability in the soil is determined by the rate of mineralization. N mineralization can be estimated using several models. Aim of research is to compare of two kinetics models for estimating N mineralization affected by different inputs of organic matter and soil fertility in Typic Hapludults. Research used completely randomized design with two factors. The first factor was land use : (1). Soil from land cultivated by cassava crops for less than 10 years, and (2). Soil from land cultivated by cassava crops for more than 30 years. The second factor was type of organic matter: (1). Groundnut biomass, (2). Maize biomass, (3). Groundnut-maize biomass, with ratio of 1:1, (4). Groundnut -maize biomass, with ratio of 2:1, (5). Groundnut -maize biomass, with ratio of 1:2, and (6). Without organic matter. The result shows that based on the value of R 2 , first-order kinetics equation is more suitable to decribe N mineralization than double-pool kinetics equation because R-square value higher than double-pool kinetics and is positively correlated with N mineralization parameters (N0, k and N0.k).

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Changes in gross rates of nitrogen transformations in soil caused by conversion of paddy fields to upland fields

Cited by 15 publications

References 11 publications

Controls on Nitrogen Cycling in Terrestrial Ecosystems: A Synthetic Analysis of Literature Data

Controls on Nitrogen Cycling in Terrestrial Ecosystems: A Synthetic Analysis of Literature Data

Characteristics of Decomposition of Nitrogen and Carbon in the Sediments in Agricultural Drainage Canals

Comparison of two kinetics models for estimating N mineralization affected by different quality of organic matter in Typic Hapludults

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