EFFECT OF ORGANIC MATTER APPLICATION AND WATER REGIMES ON THE TRANSFORMATION OF FERTILIZER NITROGEN IN A PHILIPPINE SOIL

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概要

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• Greenhouse experiments using the tracer technique showed that about 20 per cent of the fertilizer nitrogen added as basal to the Maahas clay soil was immobilized in submerged soils to which no organic material was added. The addition of organic matter to the soil increases the amount of nitrogen immobilized and the magnitude depends on the carbon to nitrogen ratio of the materials added. More fertilizer nitrogen was immobilized in the soils under upland and alternate wet-and-dry conditions than under submerged soil conditions. The uptake of fertilizer nitrogen by rice plants growing under submerged soil conditions ceased at the vegetative stage of growth because only a small amount of available nitrogen remains in the soil at this time, but the rice plant continued to absorb gradually untagged nitrogen from the soil throughout the reproductive stages of growth. Losses of fertilizer nitrogen were great under the alternate wet-and-dry conditions (submerged-upland). The loss of nitrogen from the soil-plant system was reduced by the addition of rice straw, which also reduced the uptake of fertilizer nitrogen but not the total dry matter production under the experimental conditions. Fertilizer nitrogen immobilized during the first crop remained mostly in the soil throughout the full period of the second crop. The total nitrogen uptake by rice plants was not affected by the soil moisture tension under the upland conditions used in the study but the movement of nitrogen from the leaves to the panicles during the reproductive stage seemed to decrease as the soil moisture tension increased.

• 社団法人日本土壌肥料学会の論文

著者

• Padre Jr.

  The International Rice Research Institute

• YOSHIDA Tomio

  The International Rice Research Institute

• BNJAMIN C.

  The International Rice Research Institute

関連論文

• QUANTITATIVE STUDY ON NITRIFICATION IN FLOODED RICE SOIL
• Mineralization of Azolla N and Its Availability to Wetland Rice : I. Nitrogen Mineralization of Different Azolla Species as Affected by Their Chemical Composition
• Sexual Hybrids of Azolla filiculoides with A. microphylla
• DECOMPOSITION OF RICE RESIDUES IN TROPICAL SOILS : IV. The Effect of Rice Straw on Nitrogen Fixation by Heterotrophic Bacteria in Some Philippine Soils
• NITROGEN TRANSFORMATIONS OF AMMONIUM SULFATE AND ALANINE IN SUBMERGED MAAHAS CLAY
• DECOMPOSITION OF RICE RESIDUE IN TROPICAL SOILS : III. Nitrogen Mineralization and Immobilization of Rice Residue during Its Decomposition in Soil
• EFFECT OF ORGANIC MATTER APPLICATION AND WATER REGIMES ON THE TRANSFORMATION OF FERTILIZER NITROGEN IN A PHILIPPINE SOIL
• DEGRADATION OF 2,4-D, 2,4,5-T, AND PICLORAM IN TWO PHILIPPINE SOILS
• FORMATION AND DEGRADATION OF ETHYLENE IN SUBMERGED RICE SOILS
• DISTRIBUTION, AND UPTAKE BY RICE PLANTS OF ^N-LABELED AMMONIUM APPLIED IN MUDBALLS IN PADDY SOILS
• ATMOSPHERIC NITROGEN FIXATION BY PHOTOSYNTHETIC MICROORGANISMS IN A SUBMERGED PHILIPPINE SOIL
• EFFECT OF ORGANIC MATTER ON THE BIODEGRADATION OF SOME ORGANOCHLORINE INSECTICIDES IN SUBMERGED SOILS
• EFFECT OF ORGANIC ACID TRANSFORMATIONS IN SUBMERGED SOILS ON GROWTH OF THE RICE PLANT
• NITRIFICATION AND DENITRIFICATION IN SUBMERGED MAAHAS CLAY SOIL
• DECOMPOSITION OF RICE RESIDUE IN TROPICAL SOILS : I. Nitrogen Uptake by Rice Plants from Straw Incorporated, Fertilizer (Ammonium Sulfate) and Soil
• DECOMPOSITION OF RICE RESIDUE IN TROPICAL SOILS : II. Immobilization of Soil and Fertilizer Nitrogen by Intact Rice Residue in Soil

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