【摘要】 用多年生黑麦草品种Cutter在狗牙根建植的草坪上进行冬季盖播的研究结果表明 :从盖播草坪群落的合理演替角度来看 ,最适宜的盖播量为 2 0g/m2 ;从施肥效果来看 ,在生长前期实行高施肥 (90 g/m2 ·y) ,可以导致盖播群落向有利于黑麦草生长的方向演替 ,加速盖播草坪的成坪周期 ,而在黑麦草夏枯前后的过渡阶段以低施肥 (45g/m2 ·y)为佳 ,这样可以降低黑麦草生长的优势度 ,使盖播群落向有利于狗牙根恢复生长的方向发展更多还原

【Abstract】 A bermudagrass turf was overseeded with Cutter,a turf type variety,in Guangzhon jockey Club.Seeding and fertilizing rates were adjusted as the experimental treatments.Main results observed were shown as follows: Bermudagrass kept green in February in the turf overseeded with annual ryegrass,but those in the contrasts,which were not overseeded,became withering.The fact means that the overseeding provided a better environment for growth and overwintering of bermudagrass.The densities of bermudagrass were decreased largely in the treatments with high overseeding rate 30 g/m 2 of annual ryegrass.It may be attributed to the harder competition between bermudagrass and annual ryegrass.So the suitable overseeding rate are estimated to be 20g/m 2,because the overseeding quality in the treatments with 20g/m 2 overseeding rate was as better as that with 30g/m 2 overseeding rate.In the seedling stage of overseede annual ryegrass,higher fertilizing rate 90g/m 2 speeded the establishment of the seedling.However,it seemed to be better to use lower fertilizing rate 45g/m 2 after the seedling establishment,especially in the early stage of summer.更多还原