摘要
试验研究了不同播种期、不同播量、播法及不同利用时期和利用方式对鸭茅生长发育的影响。结果表明 :在没有灌溉条件下种植鸭茅 ,播期是成败的关键 ,秋旱后播种最好 ;条播稍好于撒播 ,覆土远胜于不覆土 ;播量以 3.0 kg/ 6 6 7m2 为佳 ,其鲜草产量达 370 4 .6 kg/ 6 6 7m2 。该草生长第 1年产量比第 2年低 36 .4 % ,其越夏率可达 93.5% ,但若利用不当 ,其越夏率大幅度下降 ,最低仅为2 9.2 %。因此 ,建议在生长第 1年留种 ,第 2年以始牧高 30 cm,留茬高 6 .0～ 8.0 cm,刈割或放牧利用 ,在高温伏旱来临前停止利用 ,并重施肥料 ,既可达高产又可安全越夏。
Effects of different sowing date, sowing norm, sowing method, using period and cutting method on the growth and development of Dactylis gromerata in artificial meadow. The results showed that the sowing date was the key factor to establish meadow without irrigation in the upland. it was the best to sow immediately after Autumn drought. Drilling and covered with soil was better than broad casting and no coverage respectively. The most suitable sowing norm was 3.0kg/667m 2 and it yielded 3 704.6kg/667m 2 of fresh forage. The yield of Dactylis gromerata was lower by 36.4% in the first year than that of second year. Its over summering rate was 93.5%, but sharply decreased under unsuitable utilization. It was advantageous to high yield and over summering that Dactylis gromcrata was retained for seed production in the first year, and initially grazed at 30cm height of the meadow surface, and stopped grazing in 6.0～ 8.0cm of stubble. Plentiful fertilizer should be applied before the coming of high temperature and severe drought in Summer.
出处
《贵州农业科学》
CAS
2000年第3期40-43,共4页
Guizhou Agricultural Sciences
基金
贵州省农业厅科技项目
