从牧草的再生方式、再生速度、再生强度和再生草生育期规律研究了四种优势牧草再生生物学特性。伊犁绢蒿(Seriphidium transililense)春季再生主要由被剪割后的短、长营养枝继续生长和利用后受到刺激的根颈部位上的芽长成新的营养枝,利用后的长营养枝也可发育为生殖枝,但受利用时期与次数的影响较大;秋季主要靠营养枝的顶芽长成新叶(而不长成新枝)再生。总的来看,其再生较弱,与一次利用比,多次利用后,平均再生速度明显下降,再生草总量占总产草量的77％。短柱苔草(Carex turkestanica)春季主要以株丛内轮近地表处的芽长成新叶和未被利用破坏的叶子继续生长的方式再生,利用后残留的叶片也可继续生长,但速度较慢,秋季则只有最内轮的芽萌生成很小的叶片一种再生方式。其再生能力高于伊犁绢蒿,再生草总量占总产量的88％。羊茅(Festuca ovina)的再生方式在春秋两季相差不大,均以三种方式再生:即分蘖节上的新芽长成新叶;顶端未经利用的叶片继续生长;顶端被利用后残留叶片继续生长。多次利用后,平均再生速度为2.0 cm/10天,春季再_生力较强,秋季则显微弱,夏季休眠期没有再生。再生草总量占总产量的87％。针茅(Stipa capillala)再生方式总体上与羊茅基本相同。春季返青再生较晚,夏季休眠现象表现较弱,炎热对新叶的危害不大,秋季新叶仍有一定的再生能力。其再生速度是四种牧草中最快的类型。再生草总量也可占总产量的88％。这四种牧草一年最多可利用五次,春季四次,秋季一次,春季利用对生殖枝的生长都有一定的影响。从再生速度与再生强度两方面比较,它们再生能力的强弱顺序为针茅、羊茅、短柱苔草、伊犁绢蒿。 The biological characteristics of four dominant forages were studied based on the regeneration pattern, regeneration rate, regeneration intensity and the law of reproductive growth period of forage grass. Seriphidium transililense spring regeneration mainly by the cut after the short, long vegetative branches continue to grow and use after stimulation of the root neck buds grow into new vegetative branches, the use of long vegetative branches Can develop into reproductive branches, but by the use of the period and the number of greater impact; fall mainly by vegetative shoots grow into new leaves (rather than grow into new branches) regeneration. In general, the regeneration rate is weaker. Compared with the primary utilization rate, the average regeneration rate decreased significantly after repeated utilization. The total amount of regenerated grasses accounted for 77% of the total production. Carex turkestanica is mainly regenerated in the spring when the buds grow into new leaves near the surface of the plant and continue to grow without using damaged leaves. However, the remaining leaves can continue to grow after use, but the speed is higher Slow, autumn is only the innermost bud sprouting a very small leaf regeneration. Its regeneration ability is higher than that of Yili Sericulture, the total amount of regenerated grass accounts for 88% of the total output. Regeneration of Festuca ovina was similar in spring and autumn, and was regenerated in three ways: the shoots on the tillering node grew into new leaves; the top unused leaves continued to grow; the top leaves were used after the remaining leaves Continue to grow. After repeated use, the average regeneration rate was 2.0 cm / 10 days. In the spring, the vigor was stronger, the autumn was faint, and the summer dormant period was not regenerated. The total amount of recycled grass accounts for 87% of the total output. Stipa capillala regeneration is generally similar to fescue. Regeneration of the spring back green late, the performance of the summer dormancy is weak, little harm to the new leaves of heat, the new leaves in autumn still have some ability to regenerate. Its rate of regeneration is the fastest of the four pastures. The total amount of recycled grass can also account for 88% of the total output. The four pastures can be used up to five times a year, four times in spring, one in autumn, and the utilization in spring has a certain impact on the growth of reproductive branches. From the regeneration speed and regeneration intensity of two aspects, their regeneration ability of the order of Stipa, Fescue, short column Carex, Artemisia ipleana.