Summary
Relationships between available nitrogen determined by two anaerobic incubation methods (30°C for 2 weeks: 40°C for 1 week) and seven chemical indexes (Organic C, total N, ammonium released by acid dichromate, acid permanganate, alkaline permanganate, hydrogen peroxide and dilute sulfuric acid) and nitrogen percent in rice plant, nitrogen uptake and dry-matter yield of IR 26 rice grown under submerged conditions in pots were investigated using 39 Philippine wetland rice soils differing markedly in their capacities to supply nitrogen. It was found that all the availability indexes were best correlated with nitrogen uptake of rice followed by N% in rice plants at 55 days after seeding. Dry-matter yield of rice was also significantly correlated with the available nitrogen status but the correlation coefficients were the lowest. It is concluded that for unfertilized soils, nitrogen uptake provides a better criterion for evaluating the performance of nitrogen availability indexes for wetland rice.
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References
Bremner JM (1960 Determination of nitrogen in soil by the Kjeldahl method. J. Agric. Sci. 55, 11–33.
Bremner J M 1965 Total nitrogen.In Methods of Soil Analysis. Ed. C A Black. Part 2, Agronomy 9. pp 1149–1178. Am. Soc. Agron., Madison, Wisconsin.
Chalk P M and Waring S A 1970 Evaluation of rapid tests for assessing nitrogen availability in wheat soils. 1. Correlation with plant indices of availability obtained in pot culture. Aust. J. Exp. Agric. Animal Husb. 10, 298–305.
Gasser J K R and Kalembasa S J 1976 Soil nitrogen IX. The effects of leys and organic manures on the available-N in clay and sandy soils. J. Soil Sci. 27, 237–249.
Sahrawat K L 1980 Nitrogen supplying ability of some Philippine rice soils. Plant and Soil 55, 181–187.
Sahrawat K L 1982 Assay of nitrogen supplying capacity of tropical rice soils. Plant and Soil 65, 111–121.
Sahrawat K L 1982 Evaluation of some chemical indexes for predicting mineralizable nitrogen in tropical rice soils. Commun. Soil Sci. Plant Anal. 13, 363–377.
Sahrawat K L and Ponnamperuma F N 1978 Measurement of exchangeable NH +4 in tropical rice soils. Soil Sci. Soc. Am. J. 42, 282–283.
Stanford G and Smith S J 1978 Oxidative release of potentially mineralizable soil nitrogen by acid permanganate extraction. Soil Sci. 126, 210–218.
Subbiah B V and Asija G L 1956 A rapid procedure for the estimation of available nitrogen in soils. Current Sci. 25, 259–260.
Walkley A and Black I A 1934 An examination of the Degtjareff method for determining soil organic matter and a proposed modification of the chromic acid titration method. Soil Sci. 37, 29–38.
Waring S A and Bremner J M 1964 Ammonium production in soil under waterlogged conditions as an index of nitrogen availability. Nature London 201, 951–952.
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Sahrawat, K.L. Correlations between indexes of soil nitrogen availability and nitrogen percent in plant, nitrogen uptake, and dry-matter yield of rice grown in the greenhouse. Plant Soil 74, 223–228 (1983). https://doi.org/10.1007/BF02143612
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DOI: https://doi.org/10.1007/BF02143612
Key words
- Acid dichromate
- Acid permanganate
- Anaerobic incubation
- Correlations
- H2O2 oxidation
- Nitrogen uptake
- Organic C
- Soil nitrogen
- Sulfuric acid hydrolysis
- Rice
- Total N