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以栓皮栎在我国天然分布的南界、中部和北界为研究样点,将不同纬度的栓皮栎实生幼苗移栽到同一地点,于生长旺季同时在种源地和移栽地进行取样和测定,探讨生境变化对栓皮栎幼苗生长旺季营养元素含量特征的影响.结果表明:生境变化对栓皮栎幼苗各器官N含量和茎P含量的影响显著,而对各器官K含量和叶片、根P含量影响较小;在种源地,栓皮栎各器官的N含量与纬度间呈极显著的正相关,茎、根的全P含量随纬度升高而降低,叶片N/P的变化不明显;移栽后,北界栓皮栎幼苗各器官的N、P含量显著降低,不同纬度来源对栓皮栎幼苗N、P含量的影响更为明显;各纬度栓皮栎叶片的N/P均有不同程度的升高.不同纬度栓皮栎幼苗不同器官的营养元素含量存在差异,其对生境变化的响应也不相同.
Quercus variabilis was planted in the southern, central and northern boundary of the natural distribution in China. Transplanted seedlings of Quercus variabilis seedlings from different latitudes were transplanted to the same site, sampled and determined at provenance and transplanting sites simultaneously during the growing season , And the effects of habitat changes on the nutrient elements content in the growing season of Quercus variabilis seedlings were studied.The results showed that: the change of habitats had a significant effect on the content of N and the content of stem P in various organs of Quercus variabilis seedlings, but the content of K, The results showed that there was a significant positive correlation between N content and latitude in provenances, total P content in stems and roots decreased with increasing latitude, and N / P in leaves did not change significantly After transplanting, the N and P contents in different organs of Quercus variabilis seedlings were significantly decreased, and the effect of different latitude sources on the N and P contents of Quercus variabilis seedlings was more obvious. The N / P content of Quercus variabilis leaves varied in different degrees High.Different latitudes of different seedlings of Quercus variabilis seedlings of different nutrient content, there is a different response to changes in habitats.