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數種 植物의 密度-競爭效果에 關한 硏究 Studies on the Competition-Density Effect of Some Higher Plants

Journal of Plant Biology 1972년 15권 2호 p.7 ~ 19
진희성,
소속 상세정보
진희성 (  ) 
조선대학교 문리과대학

Abstract


The studies of density effect or the effect of population density on plant growth have been done on basis of dry matter production with Raphanus acanthiformis var. simoodaeguen, Brassica campestris var. Pekinensis f. namsounsokoombecheu, Oryza sativa f. kimmajae and 0. sativa f. mangyeng grown in the various spacing.
1. In the early period of plant growth in dry weight was not different each other among varying densities, but as time advanced the plant grown vast space grew sufficiently compared with those of narrow one.
2. Iogarithmic relation between the growth of plant(W) and the density(P), log Wlog P in the material plants, were approximated by two straight lines, one was horizontal line and another inclined: the former showed non-competition density and the latter competition density addition to these the point interlinking both lines were implied of the optimum density per unit land area at certain growth period.
3. The values of relative growth rate(RGR) and net assimilation rate(NAR) were decreased as increase in the density, while those of leaf area ratio(LAR) were rather increased in the same condition, with minor exception.
From these results and relation between the productive structure and due to lack of the recieved light intensity owing to the mutal shading among the plants.

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