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灌木群落的生物量及其在不同器官分配与土壤理化特征之间关系复杂。以毛乌素沙地柠条锦鸡儿(Caragana korshinskii)、油蒿(Artemisia ordosica)、杨柴(Hedysarum fruticosum)灌木群落为研究对象,分析了不同灌木的生物量分配与土壤理化特征的相关性。结果表明:供试的3种灌木整株生物量与各器官生物量均为:柠条锦鸡儿>油蒿>杨柴,且达到了显著性差异(P<0.05)。3种灌木各器官生物量及分配比例为:茎>根>叶。其中,柠条锦鸡儿的生物量在茎、根、叶的分配比例分别为62%、25%、13%;油蒿的分配比例分别为53%、30%、17%;杨柴分别是55%、35%、10%。3种灌木群落土壤有机质含量均表现为随土层加深而递减的垂直变化特征。相关性分析表明,3种灌木整株生物量与土壤有机质含量呈极显著正相关性(r=0.920**,P<0.01),与土壤全氮、速效氮含量呈显著正相关性,相关系数分别为r=0.762*(P<0.05)和r=0.789*(P<0.05),而与土壤全磷和速效磷含量的关系不显著。3种灌木整株生物量及其在不同器官分配特征与荒漠生境有关,它们与干旱、半干旱环境长期相互作用产生了不同的生存策略,茎的木质化程度、叶构型、根系分布情况会影响各器官的异速生长,进而影响了生物量的分配特征。在荒漠生态系统中,灌木林生产力受群落类型和土壤养分的共同制约。
The biomass of the shrub community and its relationship between the allocation of different organs and the physical and chemical characteristics of the soil are complex. The shrub Caragana korshinskii, Artemisia ordosica and Hedysarum fruticosum shrub communities in the Mu Us Sandland were used to study the correlation between biomass allocation and soil physical and chemical characteristics of different shrubs. The results showed that the whole plant biomass and biomass of three shrubs were: Caragana korshinskii> Artemisia ordosica> Artemisia selengensis, and reached a significant difference (P <0.05). The biomass and distribution ratio of the three shrubs were: stem> root> leaf. Among them, the biomass of Caragana korshinskii was 62%, 25% and 13% in the stem, root and leaf respectively; the proportions of A. ordosica were 53%, 30% and 17% respectively; %, 35%, 10%. The contents of soil organic matter in the three shrubbery communities showed the vertical variation characteristics decreasing with the deepening of the soil layer. Correlation analysis showed that the biomass of the three shrubs was significantly and positively correlated with soil organic matter content (r = 0.920 **, P <0.01), and had significant positive correlation with soil total nitrogen and available nitrogen, the correlation coefficient R = 0.762 * (P <0.05) and r = 0.789 * (P <0.05), respectively, but not significantly with soil total phosphorus and available phosphorus content. The whole plant biomass of three shrubs and their distribution characteristics in different organs were related to desert habitats. Their long-term interactions with arid and semi-arid environments gave rise to different survival strategies. The lignification, leaf configuration and root distribution of stems Affect the allometric growth of various organs, thereby affecting the distribution of biomass characteristics. In desert ecosystems, the productivity of shrubberies is constrained by the type of community and soil nutrients.