返青期休牧对祁连山区中度退化草原化草甸草地的影响

发布时间：2018-06-14 17:17

本文选题：祁连山区 + 草原化草甸　；参考：《草业科学》2017年10期

【摘要】：为解决祁连山区高寒草地牧草返青期季节性超载过牧问题,自2015年5月至7月起连续两年在青海省祁连县默勒镇瓦日尕村的冬春放牧地上进行了为期60d的返青期休牧试验,休牧期间放牧家畜全部采用舍饲圈养,并于2016年8月中旬对休牧草地进行植被调查。结果表明,返青期休牧可使草地群落的总盖度、总植物量显著增加(P0.05),使禾本科牧草株高、分盖度和植物量显著增加(P0.05),对莎草科植物影响不显著(P0.05);阔叶型毒杂草的株高、盖度、生物量均有下降的趋势。休牧两年与休牧一年相比,群落中禾本科植物的株高、盖度、植物量均在继续增加,阔叶型毒杂草的各项指标继续下降。结果证明,返青期休牧可有效促进祁连山区草原化草甸退化草地的植被恢复,并大幅度提高草地生产力。
[Abstract]:In order to solve the problem of seasonal overgrazing of alpine grassland in the turning green period, from May to July 2015, a 60-day grazing experiment was carried out on the winter and spring grazing ground in Warega Village, Merle Town, Qilian County, Qinghai Province for two consecutive years. All grazing animals were kept in captivity during grazing period, and vegetation investigation was carried out on the forage land in mid August 2016. The results showed that the total coverage of grassland community, the total plant quantity, the plant height, the coverage and the plant quantity of gramineous forage were significantly increased, and the plant height and coverage of broadleaved weeds were not significantly affected on the plants of Cyperidaceae, the results showed that the total coverage of grassland community, the total plant amount, the plant height, the plant coverage and the plant coverage of the forage grass were significantly increased during the period of returning to green, and the plant height and coverage of the broadleaved weeds were also increased. The biomass showed a decreasing trend. The plant height, coverage and plant quantity of gramineous plants in the community continued to increase, and the indexes of broad-leaved poisonous weeds continued to decrease. The results showed that the vegetation restoration of grassland meadow degraded grassland in Qilian Mountains could be promoted effectively and the grassland productivity could be greatly improved.
【作者单位】：青海大学畜牧兽医科学院(青海省畜牧兽医科学院);青海大学三江源区高寒草地生态省部共建教育部重点实验室;祁连县草原监理工作站;
【基金】：青海省科技支撑计划——祁连山退化草地恢复及可持续利用技术集成与示范(2015-SF-129) 2015年祁连山生态保护与建设综合治理工程科技示范推广——黑土滩(坡)治理技术集成示范项目(2015-Q-1)
【分类号】：S812

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