草业科学2018，Vol.35Issue(1)：157-164,8.DOI:10.11829/j.issn.1001-0629.2017-0095
甘肃马鹿冬季牧场牧草再生性对刈割的短期响应
Short-term effect of mowing winter pastures of Gansu wapiti on forage regeneration
摘要
Abstract
The study investigated the short-term effect of mowing winter pastures of deer (Cervus elaphus kan-suens)on pasture productivity and community characteristics during the best growth period,under different stocking rates (1.00,1.45,2.45,3.45,4.85,and 6.90 AUM?hm—2).We found that:1)in mowed pastures, species richness increased with increasing stocking rate up to 4.85 AUM?hm—2and mowing significantly in-creased the above-ground biomass.2)In the mowed pastures,compensation index values indicated greater plant height and above-ground biomass.Highest compensation index was observed in the pastures grazed at 3. 45 and 6.90 AUM?hm—2,respectively.The effects of stocking rates on compensation index varied with differ-ences in the dominant plant species.3)Simpson's dominance and Pielou's evenness indices for mowed pastures were generally higher in heavily grazed pastures.The Shannon-Wiener diversity index of mowed pastures in-creased with increasing stocking rates up to 4.85 AUM?hm—2,and the difference owing to mowing of pastures at all stocking rates,except at 4.85 AUM?hm—2,were significant.4)We observed variation in responses a-mong plant functional groups to pasture mowing under different stocking rates.Therefore,we suggest that stocking rates should be considered when winter pastures are mowed for maximizing production potential and maintaining the stability of community structure.关键词
高寒草原/刈割/群落结构/补偿生长/物种多样性/生物量/放牧Key words
alpine grassland/mowing/community structure/compensatory growth/species diversity/bio-mass/grazing分类
农业科技引用本文复制引用
马周文,王宏,于应文,常生华,周青平,侯扶江..甘肃马鹿冬季牧场牧草再生性对刈割的短期响应[J].草业科学,2018,35(1):157-164,8.基金项目
国家自然科学基金(31672472) （31672472）
国家科技支撑计划(2012BAD13B05) （2012BAD13B05）
甘肃省退牧还草科技支撑(2015620111000485) （2015620111000485）
