メヒシバと陸稲の競争に関する研究 : 第2報乾物生長と高さの生長との関係

概要

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To construct a competition model between D. adscendens and upland rice, with a view to observing the mechanism of dry matter production and the canopy structure, the relations between dry matter production and the height of the plants were quantified. Simple and generalized allometric function was adopted mainly for the first objective of the study. Data on the density treatments, mixed culture and the shading treatments of the two species carried out in 1974 and '80 were analysed. The results obtained are as follows: 1) Allometric relations were found between the plant length and the ratio of top dry weight to the number of primary tillers (D. adscendens, upland rice) or the total number of stems (D. adscendens) throughout the treatments and growth period (Fig. 1, Table 1). The same relations were observed between the number of primary tillers or the total number of stems and the dry weight of the stems (Fig. 2, Table 1). 2) The relations between plant height and plant length fitted a single regression line for upland rice (Tabe 1), but for D. edscendens, allometric relations were observed between the plant height and the plant length × LAI (Fig. 3, Table 1).
日本雑草学会の論文
1985-01-28