不同利用方式对短花针茅荒漠草原生产力及根系生物量的影响

EFFECTS ON THE HERBAGE YIELDS AND ROOT BIOMASSES OF THE (STIPA BREVIFLORA)EREMO STEPPE UNDER DIFFERENT WAYS OF UTILIZATION

1984～1987年在内蒙古达茂旗内蒙古农牧学院哈雅教学牧场短花针茅荒漠草原上进行的试验表明,剪割高度对牧草地下生物量影响很大,留茬应不低于2cm;由于受降水的制约,牧草生长缓慢,一年应以1～2次利用为宜;一年两次利用应间隔2～3个月,使牧草有较长的再生时间;一年一次利用以8月中旬以后为宜。

The experiment was taken in Stipa breviflora eremo steppe, the teaching farm of Agriculture and animal husbandry college of Inner Mongolia, Da—mao Banner, the result indicates that, the underground biomasses were influnced seriously by the cutting height of the stubble, and that couldn't be lowered shorter than 2cm; it's better to use the pastures here once or twice in one year,for the lacking of rainfall that limited the growth of herbages in the eremo steppe; when we use them twice per year, thrershould be an interval of 2～3 months, so as to give the herbages more time to grow;while once a year,the best time for starting should after the mid 10 days of August.