Effects Of Growth And The Allocation On Modules Of Aeluropus Littoralis Var. Sinensis Population Under Fire Disturbance In Salinization Grassland In The Songnen Plain Of China

Aeluropus littoralis is a member of important pioneer species during the successional recovery process of Songnen alkaline grassland and also a kind of local eximious grazing. In this paper, by burning treatment and sampling observation in plots we made a quantitative analysis of the effect of burning treatment on growth and distribution in A. littoralis population module. We also summarize the mechanism of biomass allocation of reproductive tillers in A. littoralis population. Our data showed that two of all seven quantitative traits in A. littoralis population were found with a high coefficient of variation by both burning and non-burning treatment in seeds maturation. The biomass coefficient of variation of reproductive tillers in A. littoralis population with burning treatment is 52.33% in which max is 3.94 times of minimum while the biomass coefficient of variation of that with non-burning treatment is 28.14% in which max is 2.04 times of minimum. Max and minimum of other quantitative traits coefficient of variation in A. littoralis population module with burning or non-burning treatment are summarized below: total tiller strain 14.04% and 8.22%, nutrition strain 13.23% and 4.82%, reproductive strain 13.13% and 16.76%, and tiller strain of stolon 28.52% and 76.84%. The number and biomass of A. littoralis population module with burning treatment and non-burning treatment are basically similar. In both circumstance, nutrition strains are in absolute superiority. Comprehensive analysis of A. littoralis population quantitative traits demonstrate that in the same habitat burning treatment has adverse affects on the sexual reproduction of A. littoralis population.Among seven quantitative traits of A. littoralis population, the coefficient of variation of plant height is minimum in A. littoralis reproductive tillers with or without burning treatment. Number of leaf, length of spike, stem bomass and strain biomass are basically same, while leaf biomass, spike biomass and spike biomass allocation were found with big coefficient of variation. The coefficient of variation of spike biomass of A. littoralis in plot with burning treatment is 34.36% in which max is 4.0 times of minimum while the coefficient of variation of that without burning treatment is 55.13% in which max is 7.5 times of minimum. The coefficient of variation of spike and leaf biomass of A. littoralis in plot without burning treatment are 37.93% and 33.21% in which max is 4.3 and 4.5 times of minimum, respectively, while the coefficient of variation of that with burning treatment are 36.94% and 41.28% in which max is 8.0 and 7.0 times of minimum. Comprehensive analysis of A. littoralis reproductive tillers quantitative traits demonstrate that in the same habitat with different treatments there are big growth plasticity and variation in the quantitative traits of A. littoralis reproductive tillers. We found the similar trend of burning treatment and non-burning treatment on the plant height and biomass of A. littoralis: the plant height and biomass of A. littoralis with burning treatment is beyond that with non-burning treatment. There is certain variation between A. littoralis spike biomass with and without burning treatment. There is 11 gradients in A. littoralis spike biomass without burning treatment while there is only 6 gradients with burning treatment. In both treatments the spike biomass of A. littoralis is most distributed with weight value 0.05g. There is 6 gradients in A. littoralis spike length with burning treatment while there is 4 gradients in that without burning treatment.In A. littoralis with both burning treatment and non-burning treatment , there is very significantly positive correlation among reproductive spike biomass, total reproductive tillers biomass and stem/leaf biomass. Spike biomass shows index increase with the increase of total reproductive tillers biomass and stem biomass while shows power increase with the increase of leaf biomass. Altogether, both data analysis and equation parameters demonstrate directly and indirectly that burning treatment has an adverse effect on the reproductive growth and reproductive allocation of A. littoralis.