不同放牧强度下矮嵩草生殖生长初探  

Effect on Reproductive growth of Kobresia humilis in different Stocking Intensity

作　　者：杨元武[1] 李希来[1] 李慧燕[1] 

机构地区：[1]青海大学农牧学院,青海西宁810003

出　　处：《黑龙江畜牧兽医》2004年第4期8-9,共2页Heilongjiang Animal Science And veterinary Medicine

基　　金：国家自然基金资助项目 (3996 0 0 5 3);国家教育部骨干教师项目

摘　　要：对矮嵩草在生育期花序的生长发育进行研究 ,结果表明 :矮嵩草在 5月中旬已完成抽穗 ,6月上旬左右进入盛花期 ,6月中下旬至 7月初已形成果实雏形 ,7月底和 8月上旬果实已基本成熟。平均每穗结实 3～ 7粒 ,约 4 8%的雌蕊发育成果实。花序长 9.5～ 11.9mm ,小穗数 7.2～ 10 .2个 /花序 ,小穗长 4 .1～ 5 .1mm ,雌花数 6 .2～ 13.7个 /花序 ,雌花 /小穗为 0 .71～ 1.6 0个 /小穗 ,果实数 3.0～ 6 .6粒 /花序。放牧强度的加大将延迟花序长、小穗数、雌花数及雌花 /小穗最大值出现的时间 ,其中前两者延迟约 1周时间 ,后两者延迟约 2周时间。放牧使小穗长最大值出现的时间提前 2～The reproductive growth of Kobresia humilis in different stocking intensity were studied, it was discovered that Kobresia humilis had already finished blotting at the middle ten-day of May , entered hull-bloom stage at about the first ten-day of June , formed embryonic state of seed at the middle ten-day of June to the first ten-day of July , matured at the last ten-day of July to the first ten-day of August , and also discovered average 3～7 seeds/anthotaxy and 48% of which developed by female gamete 9.5～11.9 mm of anthotaxy leagth , 7.2～10.2 spikelets /anthotaxy ,[JP] 4.1～5.1 mm of spikelets leath , 6.2～1.37 females/anthotaxy , 0.71～0.60 females/spikelet , 3.0～6.5 seeds /anthotaxy . As the increase of stocking intensity , the period which reached maximum value of autholaxy length , spikelets , females and females /spikelets would be delayed . About the period of the maximum value , authotaxy length and spikelets would be delayed about 1 week females and females/spikelets would be delayed about 2 weeks , but spikelets length would be moved up .

关 键 词：放牧强度 矮嵩草 生殖 生长 青藏高原 高寒草甸 植物群落 

分 类 号：S812[农业科学—草业科学]