Studies on the Dry Matter Production and Structure of Rice Plants I. Growth Rate and Productive Structure of Rice Population

수도(水稻)의 물질생산(物質生産)과 그 구조(構造)에 관(關)한 연구(硏究) I. 수도개체군(水稻個體群)의 생장속도(生長速度)와 생산구조(生産構造)

  • Ahn, Su Bong (Dept. of Agronomy, Coll. of Agriculture, Chungnam Natl. Univ.)
  • Published : 1981.06.30

Abstract

In order to analyze growth and yield of rice population at the stand point of productive ecology, productive structure and growth rate of rice plants and effects of their related factors were studied. The results obtained were summarized as follows: 1. High crop growth rate was maintained throughout growing season when rice plants grew in population compared to a single rice plant. Since crop growth rate in rice stands were also higher at ripening stage, higher yields were obtained. 2. Higher crop growth rate of rice plants in population was maintained by the increase of leaf area rather than by net assimilation rate. 3. As the overgrowth of upper leaves of plant population in some rice varieties transmission of light into lower leaves was inhibited and thus most of them were eventually died before flowering. 4. In the case of rice population, the ratio of productive organ to non-productive organ, light transmission rate and nitrogen contents of active leaf blade were lower than individual rice plants under isolated condition.

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