Studies on Competition Between Grass and Legume in Mixed Sward : VII. Comparison of the increasing capability of tillers or branchings between pasture plants grown under the isolaled culture system

[摘要] In order to clarify the difference of increasing capability of tillers and branchings between the hills of orchardgrass and Ladino clover, we attempted to make the comparative tests of the aspects of increasing of tillers (blanchings) and the develipment form of tillers (branchings) among orchardgrass, Ladino clover, tall fescue and Kentuky bluegrass grown under the isolated culture system. The test results are summarized as follows...... 1) The hills of four species spreaded, respectivery, to the horizontal direction in proportion to the increase in the number of tiller or branching, but the extent of increases in the number of tiller per hill was lowest in orchardgrass than that in the other species. In case of orchardgrass, the tiller number showed a rapid increase when tiller number was still less, but after the tiller number increased, they had come to equilibrium. On the other hand, in case of Kentucky bluegrass and Ladino clover, tiller and branching number continued to increase, and the hills spreaded endlessly. In case of tall fescue, the tiller number increased slowly during the season from late Spring to early Autumn, but from late Autumn to next Spring the tiller number increased strikingly and the hill spreaded. 2) In case of orchardgrass, the tillers had come into contact with each other, and the increase of tiller led to the spreading of hill, but when tiller numer increased and tillers crowded strikingly, the birth of new tillers had come to cease. But in case of tall fescue and Kentucky bluegrass, in former, almost all the young tillers formed the mesocotyls during April and May, and in latter, some of the tillers formed the rizomes in any seasons, the distribution of tillers over a wide range at first had acceralated the birth of new tillers in later days. In case of Ladino clover, branching number observed an increase keeping pace with the elongation of the mother branching endlessly. It was seen that the elongation of branching was vigorous in bare area, and bare area had a tendency to be covered by stolons rapidly. 3) From the above stated test results, it can be concluded that the increasing capability of tiller in the hill of orchardgrass was strikingly lower than that in the hill of Ladino clover, and the difference may be caused by the difference in the development form of the tillers and branchings between the two species

[学科分类] 农业科学（综合）