Influences of Rice and Barley straw Application in the Rice Rhizosphere

수도근권(水稻根圈) 환경(環境)에 미치는 볏짚과 보릿집 시용(施用)의 영향(影響)

  • Lim, Sang-Soon (Department of Agricultural Chemistry, College of Agriculture, Chonnam National University) ;
  • Kim, Kwang-Sik (Department of Agricultural Chemistry, College of Agriculture, Chonnam National University)
  • 임상순 (전남대학교 농과대학 농화학과) ;
  • 김광식 (전남대학교 농과대학 농화학과)
  • Published : 1988.12.30

Abstract

This study has been made to investigate the influences of organic matter on the soil composition, nitrogen fixing organism, soil enzyme activity and nitrogen fixing activity in the paddy rice rhizosphere when rice and barley straw were applied. The results are summarized as follows: 1. The pH in the submerged soil was increased from ear formation stage to harvesting. 2. In the rhizosphere, $Fe^{{+}{+}}$ content was decreased according to the growing stage, while increased in the nonrhizosphere. 3. In the initial stage, rhizosphere was higher than nonrhizosphere but in the late stage nonrhizosphere was higher than rhizosphere on the $NH_4-N$ content. 4. In the submerged soil, rhizosphere was higher than nonrhizosphere, on the concentration of glucose and pentose. 5. Changes of the number of nitrogen fixing organism in whole soil was not high. 6. Generally, rhizosphere was higher than nonrhizosphere on the soil enzyme activity such as phosphatase, ${\beta}$-glucosidase, and protease. 7. Acetylene-reducing activity was the highest in the tillering stage, and rhizosphere, Samgang (high-yielding variety) were higher than nonrhizosphere. Dongjin (general variety) respectively. 8. In the submerged soil applied barley straw, acetylene-reducing activity was slightly higher than rice straw in the initial stage.

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