摘要
研究了生长年限、密度、疏枝、刈割等因素对扁穗牛鞭草有性投入频度、强度、投入量等参数的影响,结果表明,扁穗牛鞭草在第三、四年有性投入达到高峰;低密度有利于有性投入,密度对第2~4年有性投入参数的影响是绝对投入量﹥相对投入量﹥投入强度﹥投入频度,但对连续4年植株总投入参数的影响趋势是投入频度﹥绝对投入量﹥相对投入量﹥投入强度;在密度为1株/㎡,保留3/5枝条的条件下,投入频度与投入强度最大;刈割会减少本年度的有性投入;有性投入是内部物质分配与外部环境因子累积的共同结果,克隆生长与有性繁殖之间存在着竞争与协作。
The influence of growing year,density,pruning mode and cutting on the parameters for the sexual reproductive investment of Hemarthria compressa,such as input frequency,input intensity,and input quantity,were studied.The results showed that the sexual reproductive investment index were at peak in the 3rd or 4th year after planted.Low density was helpful for sexual input.In the second,third,forth year,the absolute input quantity was in the largest degree influenced by density,and subsequently,relative input quantity,input intensity and input frequency.Meanwhile,the total influence trend for four years was input frequency,absolute input quantity,relative input quantity and input intensity.If the stem were conducted by pruned,the input frequency and input intensity were higher under remained 3/5 branch of 1/m2 density population than the other unions.But cutting before august always reduced the sexual reproductive investment of H.compressa in current year.As a result of internal material distribution and environmental accumulated interactions,the investment of sexual always displayed a potential balancing strategy.And there had competition and cooperation between cloning growth and sexual reproduction.
出处
《湖北农业科学》
北大核心
2011年第3期553-556,共4页
Hubei Agricultural Sciences
基金
四川省教育厅项目(08zc008)
西华师范大学科研启动项目(06B032)
关键词
扁穗牛鞭草
有性繁殖
有性投入
繁殖对策
Hemarthria compressa
sexual reproduction
sexual reproductive investment
trade-off
