Plants utilize different strategies in different environments to maximize population expansion. Understanding plant reproductive strategies in heterogeneous habitats is therefore important for explaining plant ecological adaptability, and for effectively managing and conserving ecosystems. We wanted to explore the reproductive strategy transformation of D. angustifolia in heterogeneous habitats, as well as the environmental factors driving and affecting its reproductive characteristics. To do this we measured the reproductive characteristics of D. angustifolia, as well as the soil physical and chemical properties of these heterogeneous habitats. The density, biomass per unit area, and proportion of aboveground biomass in swampy meadows were significantly higher compared to other habitats. The proportion of rhizome node buds gradually increased from swampy to typical to miscellaneous grass meadows, while the proportion of tillering node buds decreased. The allocation of sexual reproduction within D. angustifolia populations was significantly and positively correlated with plant rhizome biomass and negatively correlated with the number of tillering node buds. The propagation strategies of D. angustifolia in heterogeneous habitats were consistent with CSR theory (Competitor, Stress-tolerator, and Ruderal). The proportions of inflorescence (2.07 ± 0.52%; 1.01 ± 0.15%) and root (23.8 ± 1.5%; 19.6 ± 1.4%) biomass in miscellaneous and typical meadows were high, which tended toward the “Ruderal” adaptation strategy. In swampy meadow, D. angustifolia invested mostly in vegetative growth to produce tiller node buds (14426.67 buds/m2; 46%) and ramets (1327.11 ± 102.10 plants/m2), which is characteristic of the “Competitor” strategy. Swamp D. angustifolia resisted flooding by maintaining a resource balance in its body, and was therefore biased toward the “Stress-tolerator” strategy. Environmental factors accounted for 74.63% of reproductive characteristic variation, in which the interpretative proportions of soil water content, dissolved organic carbon, ammonia nitrogen, and nitrate nitrogen were significant (p < 0.01). When soil water content, dissolved organic carbon, and nitrate nitrogen increased, D. angustifolia tended toward the C strategy; in contrast, when soil water content decreased, amine nitrogen and available phosphorus increased, and D. angustifolia tended toward the R strategy. In a stressful environment, the escape mechanism constitutes an increased rhizome and sexual reproduction investment. In contrast, for suitable habitats, tillering node buds increased in order to expand the population via new plant production, which was the propagation strategy of D. angustifolia in heterogeneous habitats.

中文翻译：

---

异质生境中狭叶德叶夏的繁殖策略

植物在不同的环境中利用不同的策略来最大化种群扩张。因此，了解异质生境中的植物繁殖策略对于解释植物生态适应性以及有效管理和保护生态系统非常重要。我们想探索繁殖策略的转变沙枣在异质生境中，以及驱动和影响其繁殖特性的环境因素。为此，我们测量了沙枣，以及这些异质生境的土壤理化性质。与其他生境相比，沼泽草甸的密度、单位面积生物量和地上生物量比例显着更高。根茎节芽比例从沼泽地到典型草甸再到杂草草甸逐渐增加，而分蘖节芽比例下降。有性生殖的分配沙枣种群数量与植物根茎生物量呈显着正相关，与分蘖节芽数呈显着负相关。传播策略沙枣在异质生境中与 CSR 理论（竞争者、压力耐受者和 Ruderal）一致。杂草甸和典型草甸的花序（2.07±0.52%；1.01±0.15%）和根（23.8±1.5%；19.6±1.4%）生物量比例较高，倾向于“Ruderal”适应策略。在湿漉漉的草地上，沙枣主要投资于营养生长以产生分蘖节芽（14426.67 芽/平方米2个; 46%) 和分株 (1327.11 ± 102.10 株/m2个)，这是“竞争者”策略的特征。沼泽沙枣通过维持体内资源平衡来抵抗洪水，因此偏向于“压力耐受”策略。环境因素对生殖特征变异的解释占74.63%，其中土壤含水量、溶解性有机碳、氨氮、硝态氮的解释比例显着（p< 0.01）。当土壤含水量、溶解性有机碳和硝态氮增加时，沙枣倾向于C策略；相反，当土壤含水量降低时，胺氮和有效磷增加，并且沙枣倾向于R策略。在压力环境中，逃逸机制构成了增加的根茎和有性繁殖投资。相反，对于合适的栖息地，分蘖节芽增加以扩大种群通过新植物生产，这是繁殖策略沙枣在异质生境中。