Yang Yunfei, Zhang Baotian, Li Jiandong
Key Laboratory for Vegetation Ecology, Ministry of Education, Institute of Grassland Science, Northeast Normal University, Changchun 130024, China.
Ying Yong Sheng Tai Xue Bao. 2003 Nov;14(11):1847-50.
Leymus chinensis is a perennial rhizome grass, a species of typical clonal plant. In the Songnen Plains of China, the ramets of the clone consist of tillers and seedlings under cultivated condition during the last stage of growing season. The tillering nodes of the ramets could propagate four generations, with enough growing space and no interspecies competition in the sandy soil habitats during a growing season. According to the vegetative reproductive generations of tillering nodes, the age spectrum was the largest on the modules of the first age classes for present or potential clones, which reduced obviously with increasing age classes, and they were all expanding type on the age structure. The productivity of every ramet module correlated largely with the time length for growing and the formation of the ramets. The earlier formation time and the longer growing time, the greater the tillers contributed to material production and vegetative reproduction of the clone. There was a certain capability of adjustment for the spatial expansion and the material storage of the test clones.
羊草是一种多年生根茎型禾本科植物，是典型的克隆植物物种。在中国松嫩平原，在生长季末期的栽培条件下，克隆分株由分蘖和幼苗组成。分株的分蘖节在一个生长季内，在沙质土壤生境中，若有足够的生长空间且无种间竞争时，可繁殖四代。根据分蘖节的营养繁殖代数，对于现存或潜在克隆体，年龄谱在第一龄级模块上最大，随龄级增加明显减小，且在年龄结构上均为增长型。每个分株模块的生产力在很大程度上与生长时间长度和分株的形成有关。形成时间越早、生长时间越长，分蘖对克隆体物质生产和营养繁殖的贡献就越大。试验克隆体在空间扩展和物质储存方面具有一定的调节能力。
