气候变暖背景下，研究甘肃马先蒿与寄主在不同生长阶段的种间关系可以揭示甘肃马先蒿种群蔓延生长和扩张策略，而对其进行个体水平的生物量分配状况和物候研究可以为更深入解释寄生植物的物种扩张提供重要依据。为此，本文在新疆巴音布鲁克高寒草原通过开顶箱（Open Top Chamber，OTC）模拟增温和覆雪处理模拟冬季降雪变化（减雪处理W，自然降雪CK和增雪处理F），分别从物候、生物量分配和个体形态特征去探讨甘肃马先蒿种群在应对气候变化时的生长策略。论文得出以下主要结论：
|其他摘要||Studies have shown that the northwest arid areas towards the development of warming and wet in recent decades, and that the winter snowfall continues to increase in tianshan region. In recent years the Pedicularis kansuensis L., a root parasitic plant, made a rapid expansion in Bayinbuluke grassland, which had made a negative impact on the ecological niche of forage growth and animal husbandry development.
Under the background of climate change, studying the interspecific relationship of P.kansuensis and host in different growth stages can reveal the spread of spopulation growing and expansion strategy of P. kansuensis, and the study of the biomass distribution of individual level and phenology research will help to make a deeper understanding of the role of parasitic relationship in species expansion. In this paper, we arrangement a research to simulate waming and winter snowfall change in the alpine grassland of Xinjiang through OTC and the snow cover change (snow reduced, CK and snow addition), all the work is for investigating the growth strategies of P. kansuensis population respectively from the phenology, biomass allocation and individual characteristics in response to climate change. Here are the following main conclusions:
1. After arming and the snow cover change, P. kansuensis reduced reproductive investment and increase nutrition investment, the biomass allocation of which response to snow addition treatment was more prominent. The sequence of biomass allocation was stem leaf allocation > flowers allocation > root allocation after arming and the snow cover change. the coordinated growth relationship between different organs of P. kansuensis, which would not change with the warming and the snow cover change, is consistent.
2. After warming the canopy, branch number and roots deepth of P. kansuensis showed a significant differences, while its plant height and lateral root length had no significant difference; Warming reduced the relationship between individual form indicators aboveground; and had certain inhibition for the growth of. P. kansuensis.
After snow addition the plant height, canopy, height of style and size of lateral root of P. kansuensis were significant differences compared to CK, the other parts had no significant difference after snow reduced except the size of lateral root compared with CK; Snow addition (F) did not change the significant correlation among the individual form indicators, instead, the snow reduced (W) strengthen the relationship of individual form indicators between the aboveground part and the underground at the same time.
3. The response to warming of different phenological phases of P. kansuensis and its host is inconsistent; In addition, after warming the different function components of community show a same trend in the start time of different phenological phase (regreening stage, flowering phenology, autumn phenology) .
Snow cover change (F and W)makes P. kansuensis and most of the host a shortened growing season; Meanwhile, the snow cover change makes flowering phenology in advanced and the autumn phenological delay of P. kansuensis and most of the host; The phenological process of P. kansuensis began to lead its host from solid phase.The P. kansuensis would achieve effective competition according to phenology polalization under the background of warming & humidifying and the increasing winter snowfall in the study area.|
陆均. 增温和覆雪对甘肃马先蒿生物量分配及其寄主物候的影响[D]. 北京. 中国科学院大学,2016.