Yang Yun-fei, Zhang Bao-tian, Zhang Chun-hua
Key Laboratory of Vegetation Ecology of Education Ministry, Institute of Grassland Science, Northeast Normal University, Changchun 130024, China.
Ying Yong Sheng Tai Xue Bao. 2007 May;18(5):977-82.
Leymus secalimus is a kind of rhizome grass and a species of typical clonal plant. The study showed that under cultivated conditions in the Songnen Plain of Northeast China, the growth of four test L. secalimus clones is with great plasticity. After 153 days of growth in the year of transplanting, the clones had 215 tillers in maximum and 40 tillers in minimum, and the growth pattern accorded with exponential function. The number and biomass of the tillers, rhizomes and buds, as well as the variations of their quantitative characters and of the survival space of the clones in two growth seasons all presented good regularity. The tillers number was in a power allometry growth with the increase of clonal diameter, and the biomass of tillers and rhizomes as well as the number of buds were all in an exponential allometry growth with the increase of the diameter. The number and biomass of the tillers and rhizomes were all in a linear isogony growth with increasing survival space of the clones. When the space was enough and no interspecies competition existed, L. secalimus clones survived first and developed then, and well exercised continuing updating potency.
赖草是一种根茎型禾草，属于典型的克隆植物。研究表明，在中国东北松嫩平原的栽培条件下，4个供试赖草克隆的生长具有很大的可塑性。移栽当年生长153天后，克隆分株最多达215个，最少为40个，其生长格局符合指数函数。两个生长季中，分株、根茎和芽的数量与生物量，以及它们数量特征的变化和克隆生存空间的变化均呈现出良好的规律性。分株数量随克隆直径的增加呈幂异速生长，分株和根茎生物量以及芽的数量均随直径的增加呈指数异速生长。分株和根茎的数量与生物量均随克隆生存空间的增加呈线性同速生长。当空间充足且不存在种间竞争时，赖草克隆先存活后发育，并充分发挥持续更新能力。
