论文部分内容阅读
研究了在红壤岗地建植苇状羊茅人工草地时,不同的播期、播量、播法和利用期以及不同的刈割方式对苇状羊茅生长发育的影响。结果表明,在南方红壤岗地无灌溉条件下种植苇状羊茅,播期是成败的关键,秋旱过后立即播种最佳;条播稍好于撒播,覆土远胜于不覆土;播量以30kg/hm2为宜,其鲜草产量12399kg/hm2。苇状羊茅草地生长第一年产量比第二年低46.1%;其越夏率可达96.1%,但利用不当则大幅下降。若生长第一年留种,第二年以始牧高30cm、留槎高6.5~9.0cm放牧利用,并在高温伏旱来临之前给它一“休养生息”期,既可高产,又有利越夏。该草地杂草侵染严重,尤其在越夏期。
The effects of different sowing dates, sowing times, sowing dates and periods of utilization and different cutting methods on the growth and development of tall fescue were studied. The results showed that planting the red fescue under the condition of no irrigation in southern red soil was the key to success or failure. The sowing date was the best immediately after the drought; the sowing was better than the sowing, hm2 is appropriate, its fresh grass yield 12399kg / hm2. In the first year, the yield of reed fescue grassland was 46.1% lower than that of the second year; the rate of summer over summer was 96.1%, but the use of improper use of straw dropped drastically. If the first year of growth to stay kind of seed, the second year to the beginning of the pastoral high 30cm, stay Gao 6.5 ~ 9.0cm grazing use, and before the advent of high temperature and drought before it is a “recuperation” period, both high and favorable Summer. The grass weeds invaded heavily, especially during the summer months.