松嫩平原星星草无性系种群构件生物量的定量研究

Quantitative Study on Module Biomass in Clonal Population of Puccinellia tenuiflora in Songnen Plain

[目的]定量研究松嫩平原星星草无性系种群功能构件的生物量结构及功能构件间的关系。[方法]采用随机挖掘整个无性系分蘖丛的取样方法,对松嫩平原开花期星星草无性系各功能构件生物量与丛径、不同构件的生产与无性系生产的关系、无性系生殖株与其组分构件生物量的关系进行了定量分析。[结果]松嫩平原星星草无性系种群支持构件、有性生殖构件、光合构件生物量随丛径增大而呈线性增加(P<0.05);而营养繁殖构件生物量与丛径的线性相关性未达到显著水平(P>0.05),丛径对各功能构件生物量的制约程度为:支持构件>有性生殖构件>光合构件>营养繁殖构件;生殖株和营养株生物量随无性系全体构件生物量的增加均呈线性增加(P<0.05),而全体构件生物量与分蘖苗生物量的线性相关性未达到显著水平(P>0.05);生殖株茎、叶与花序生物量皆与生殖株生物量呈线性函数增长(P<0.05),茎、花序和叶生物量的积累按7∶2∶1比例形成。[结论]为丛生型无性植物种群的深入研究奠定了理论基础。

[Objective] The research aimed to study the biomass structure of the functional modules of clonal population of Puccinellia tenuifora on Songnen Plain and its relationship with the functional modules quantitatively.[Method] Using the sample method of digging up the whole tiller tuft randomly at flowering stage,the relationships between the biomasses of functional modules and turf sizes,biomasses of different modules and the clone biomasses,biomasses of reproductive tillers of clones and the biomasses of component modules of Puccinellia tenuifora clones on Songnen Plain were quantitatively analyzed.[Result] The biomass of sexual reproductive module,photosynthesis module and supporting module showed a linear increase with the increasing of turf size（P〈0.05）,while the linear relationship between the biomass of vegetative reproduction module and turf size did not reach the significant level（P〉0.05）.The restriction degree of turf size on the biomasses of functional modules was as follows： supporting modulesexual reproductive modulephotosynthesis modulevegetative reproductive module.Biomasses of reproductive tillers and vegetative tillers showed a linear increase as the biomasses of total modules increased（P〈0.05）,while the linear correlation between the biomasses of tillering seedlings and biomasses of total modules did not reach the significant level（P〉0.05）.Biomasses of stem,spike and leaf of reproductive plants showed a linear functional increase as the biomass of reproductive tiller increased（P〈0.05）,and the ratio of accumulation of biomass of stem,spike and leaf was 7∶2∶1.[Conclusion] The research laid the theoretical foundation for the further research on the clustered clone plants.