| 青海扁茎早熟禾冬眠无性系种群年龄结构特征 |
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| 引用本文： | 伍磊,周青平,刘文辉,颜红波,雷生春,梁国玲.青海扁茎早熟禾冬眠无性系种群年龄结构特征[J].草业科学,2011,28(11):1967-1971. |
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| 作者姓名： | 伍磊 周青平 刘文辉 颜红波 雷生春 梁国玲 |
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| 作者单位： | 1. 青海省畜牧兽医科学院草原所,青海西宁810016／青海大学,青海西宁810013
2. 青海省畜牧兽医科学院草原所,青海西宁,810016 |
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| 基金项目： | 青藏高原特有草种资源开发及应用国家地方联合工程实验室项目 |
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| 摘 要： | 通过对青海扁茎早熟禾(Poa pratensis var.anceps cv.Qinghai) 1 年到6年栽培草地各构件龄级的统计分析得出，冬眠芽各生长年限年龄结构分为0龄到4龄5个龄级，均以0龄数量最高，并逐龄递减，冬眠苗和亲株分为1龄到4龄4个龄级，均以1龄数量最高，并逐龄递减。亲株冬眠构件数量以4 年最高，为672.3±37.74，冬眠苗和冬眠芽均以1 年数量最高，分别为（191.8±25.34）和（137.67±28.97）株。冬眠苗符合直线模型，其表达式为S=-35.96t+221.3；冬眠芽最符合的是生长曲线模型，其表达式为S=e5.472-0.374t；亲株的数量生长最符合二次曲线模型，其表达式为S=-86.417t2+547.455t-279.752。冬眠苗和冬眠芽的各龄级数量的曲线的乘幂曲线F值越高，就越有可能是增长型龄级结构，所以1年和2 年为增长龄级结构，3年和4年为稳定龄级结构，5年和6年为衰退龄级结构。
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| 关 键 词： | 青海扁茎早熟禾 无性系 种群 年龄结构 |
Age structure features of cloning population hibernation of Poa pratensis var.anceps cv.Qinghai |
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| WU Lei,ZHOU Qing-ping,LIU Wen-hui,YAN Hong-bo,LEI Sheng-chun,LIANG Guo-ling.Age structure features of cloning population hibernation of Poa pratensis var.anceps cv.Qinghai[J].Pratacultural Science,2011,28(11):1967-1971. |
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| Authors: | WU Lei ZHOU Qing-ping LIU Wen-hui YAN Hong-bo LEI Sheng-chun LIANG Guo-ling |
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| Institution: | 1(1.Qinghai Academy of Animal Husbandry and Veterinary Sciences,Qinghai Xining 810016,China; 2.Qinghai University,Qinghai Xining 810013,China) |
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| Abstract: | Characteristics of age structures of one-to six-year pasture of Poa pratensis var.anceps cv.Qinghai was studied in the experiment.The results indicated that age structures of hibernated buds were from 0 to 4 years old with 5 classes,while hibernated seedlings and parent strains had 4 classes from 1 to 4 years old.For the hibernated buds,the 0 years old number was the highest,but for the seedlings and parent strains the 1 years old number was the best.However,all of them were decreased when ages increased.The four-year number of hibernation components of parent strain was the highest,for 672.3±37.74;while the one-year numbers of hibernated seedlings and buds were the highest,191.8±25.34 and 137.67±28.97 respectively.Hibernated seedling age structure was fitted with a linear model,which was S=-35.96 t+221.3,while the hibernated bud was fitted with a growth curve,S=e5.472-0.374 t,and parent strain was followed a quadratic curve,S=-86.417 t2+547.455 t-279.752.When the each of age class number curve of hibernate seedlings and buds was fitted with a power curve,the higher the F value,the more likely growth-type age class structure.In conclusion,1-and 2-year pasture were growth age structure;3-and 4-year were stable age structure;and 5-and 6-year were recession age structure. |
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| Keywords: | Poa pratensis var anceps cv Qinghai cloning population age structure |
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