Effects of Cutting Intensity and Stubble Cover with Soil before Overwintering on the Spring Regrowth of Three-year-old Napiergrass (Pennisetum purpureum Schumach)

ISHII Yasuyuki, ITO Koji, NUMAGUCHI Hirotsugu

doi:10.14941/grass.42.20

Bibliographic Information

Other Title

植え付け後3年目のネピアグラス(Pennisetum purpureum Schumach)における越冬前の刈取り強度と覆土が翌春の再生に及ぼす影響
Effects of Cutting Intensity and Stubble Cover with Soil before Overwintering on the Spring Regrowth of Three-year-old Napiergrass(Pennisetum purpurem Schumach)
Effects of Cutting Intensity and Stubbl

Search this article

Description

Three year-old napiergrass (Pennisetum purpureum Schumach) stands were subjected to the management conditions consisting of different cutting intensities with or without stubble cover with soil in mid-November. The management effects on the spring regrowth of the plants were mechanistically analyzed mainly in relation to the tiller regrowth processes from tiller buds. The decreasing cutting intensity firstly tended to increase the total number of primary tiller buds (PTBs), which led to the increase in the number of dead PTBs. At the same time, the decreasing cutting intensity tended to increase the emerged percentage of secondary tiller buds (STBs) from dead PTBs. These changes resulted in the increase in the numbers of STBs and regrown tillers from STBs (RTstbs), and consequently in the increase in the regrown percentage of plants (RPplant). The stubble cover with soil decreased the number of regrown tillers from PTBs, but tended to increase the number of daughter tillers of RTstbs (DTstbs). The decrease and the increase almost offset each other, and there was no significant effect of the stubble cover on the RPplant. However, because of the higher proportion of DTstbs, the stubble cover was considered to be an effective practice before colder winters.

Journal

Japanese Journal of Grassland Science

Japanese Journal of Grassland Science 42 (1), 20-29, 1996

Japanese Society of Grassland Science

Keywords

Details 詳細情報について

Export