论文部分内容阅读
拟高粱播种至成熟全生育期较长,为151～154天;杂交狼尾草居中,99～114天;苏丹草最短,92～102天.春播与夏播相比,全生育期平均延长10～15天,出叶速度慢0～1天,但播期对苏丹草出叶速度的影响咬小.回期播种下春夏两季地上部DM积累以苏丹草为最快,入秋后则以拟高粱为最快,单株最终DM产量亦较高。拟高粱春播单株最终DM产量较夏播的高,苏丹草和杂交狼尾草则反之.在整个生长期间,三种牧草茎DM增长均呈上升的趋势,但叶片DM8月下旬以后均先后迅速降低。
The duration of sowing to maturity was 151-154 days, hybrid Pennisetum was middle, 99-114 days, Sudan grass was the shortest, 92-102 days.The average growth period of spring sowing compared with summer sowing was 10 ~ 15 days, the leafing speed is 0 ~ 1 day slowly, but the sowing date had little effect on the leafing speed of sudangrass.During the sowing date, To be sorghum as the quickest, the final plant DM yield is also higher. The final DM yield of spring sorghum plantlets was higher than that of summer sowing plants, while sudangrass and hybrid Pennisetum were the contrary.During the whole growing period, the stem DM growth of three kinds of pasture tended to increase, but the DM reduce.