Studies on the relation between growth of wildgrass species and reseeding pasture and wild grasses on the Sasa (Pleioblastus variegatus MAK) type grass land : I. About reseeding of Lespedeza (Lespedeza striata MAKINO)

Abstract

From 1953 to 55, we carried out the analystical study of the relation between growth of Lespedeza and Pleioblastus variegatus, Miscanthus sinensis and Lespedeza crytobotrya, as the main native grass and legumes, by method of reseeding of Lespedeza striata on the 1Ha Sasa type grass land. The method of investigation was as follows: we settled the 420 wooden frame of 60cm spuare in the field. With regard to the each wild grass and Lespedeza striata in the frame, the cover percentage, plant height and density of plants were measured at each spring and autumn and the green matter of this was measured at each autumn. The result obtained as follows. 1) When the green matter of Sasa grass was reached about 1125kg (300kan) per 10a, the introduction of Lespedeza striata reached the limiting point. It assumed that the growth of Pleioblastus variegatus affect the Lespedeza striata, when the cover percentage exceed more than 80% and density of Pleioblastus variegatus was heigh, the growth of Lespedeza striata was not observed. 2) With regard to Miscanthus sinensis, it can be observed that the cover percentage it considerably affects the growth of Lespedeza striata and when Miscanthus sinensis exceed more than 60% the growth of Lespedeza striata was very poor. If the green matter of Miscanthus sinensis within 525kg (140kan) per 10a, we have observed the introduction of Lespedeza striata are made possible. 3) With regard to Lespedeza crytobotrya, it can be observed that the density of it affects the growth of Lespedeza striata. If the green matter of Lespedeza crytobotrya was within 568kg (150kan) per 10a, the introduction of Lespedeza striata are made possible.