Physiological and Ecological Studies on the Regrowth of Herbage Plants : 16. Effect of the stage of development on the regrowth of several grasses grown under the fixed temperature conditions

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  • 牧草の再生に関する生理・生態学的研究 : 第16報数種イネ科牧草を定温条件下で再生させた場合の生育段階別再生量
  • 数種イネ科牧草を定温条件下で再生させた場合の生育段階別再生量
  • スウシュ イネカ ボクソウ オ テイオン ジョウケン カ デ サイセイ サセタ バアイ ノ セイイク ダンカイ ベツ サイセイリョウ

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In order to estimate the changes in dry weight of regrowth with the development of stage and to clarify its mechanism, 8 species of grass were defoliated at several stages of development, and kept in phytotron for 3 weeks under fixed temperatures for each species. It was found that the changes in dry weight of regrowth with the development of stage, differed in species of grass, and could be classified into four patterns. 1) The dry weight of regrowth decreased with the development of stage. (oats, Italian ryegrass) 2) The dry weight of regrowth decreased at heading and ripening stage, and was great before and after these stages. (perennial ryegrass, timothy, orchardgrass, Rhodesgrass) 3) The dry weight of regrowth increased with the development of stage. (bahiagrass) 4) The dry weight of regrowth increased at middle period of growth, and was small before and after this period. (Dallisgrass) It was shown that the dry weight of regrowth was decided by both dry weight of root and stubble at the defoliation and rate of regrowth. And in case of this experiment, the changes in dry weight of regrowth with the development of stages were affected mainly by the rate of regrowth.

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