中文摘要：

克隆植株的生长特征及其表型可塑性反映了其对环境条件变化的适应性。论文以结缕草（Zoysia japonica）为研究对象,采用4种均质光照水平（全光照、30%、50%和70%遮荫比例）和9种异质光照格局对结缕草进行处理,旨在揭示不同光照对结缕草不同发育时期克隆生长特征和表型可塑性的影响。结果表明,（1）70%均质全光照（即均匀遮光30%）条件下结缕草克隆植株生长情况最好,其总生物量和分株数目等指标都达到最大值。其次为全光照、50%和30%均质全光照。（2）对结缕草克隆植株实施异质光照处理时,30%遮荫条带对克隆植株生长和克隆构型指标未产生显著影响;50%遮荫条带处于植株基部相比处于中、尾部时,植株根冠比高,B分株数目低,但对其它指标影响不显著;70%遮荫条带处于植株基部相比处于中、尾部时,植株根冠比高,并且其它指标都显著降低;不同强度的遮荫条带处于植株中、尾部时,各项指标无显著差异。这一研究有助于了解结缕草克隆植株在不同光照条件下的生长发育特征和适应策略,对于结缕草地的科学经营具有理论和实践指导意义。

英文摘要：

Growth characteristics and phenotypic plasticity of clonal plant reflect its adaptability to the change of environmental conditions. Growth characters of Zoysia japonica were studied using four levels of homogeneous light intensity, i.e., full light, 30%, 50% and 70% shading, and 9 patterns of heterogeneous light intensity, in order to reveal the effect of light intensity variation on the clonal growth characteristics of Z. japonica at different developmental stages. The results showed that（1） Z. japonica grew best in 70% of homogeneous full-light condition and the total biomass and ramet number reached to the maximum. The orders of general growth performance of Z. japonica from good to bad were 70%, 100%, 50% and 30% of homogeneous full-light conditions.（2） When Z. japonica grew in heterogeneous light conditions, the positions of 30% shading belt did not significantly affect the clonal growth characteristics. When 50% shading belt was at basal part of Z. japonica, R/S increased but the number of B-ramet decreased but other indexes were not significantly affected, as compared to the conditions of 50% shading belt at middle and distal parts of the plant. When 70% shading belt was at basal part of Z. japonica, R/S increased but other indexes decreased, as compared to the conditions of 70% shading belt at middle and distal parts of the plant. When the shading belts with different intensities were at middle and distal parts of the plant, all indexes were not affected significantly. This research might help to understand the growth and developmental characteristics and adaptive strategies of Z. japonica under different light conditions, and theoretically and practically guide the scientific management of Zoysia grassland.