喀斯特山区无籽刺梨叶片N、P化学计量学特征研究
Study on the Stoichiometric Characteristics of N and P in the Leaves of Rosa kweichonensis var. Sterilis in Karst Mountains
DOI: 10.12677/HJSS.2022.101004, PDF,    科研立项经费支持
作者: 陈 波, 王 羽, 殷梦贵, 申 咏：贵州师范学院地理与资源学院，贵州 贵阳；吕文强*：贵州师范学院地理与资源学院，贵州 贵阳；贵州省流域地理国情监测重点实验室，贵州 贵阳
关键词: 喀斯特山区；无籽刺梨；叶片N、P；Karst Mountain Area； Rosa kweichonensis var. Sterilis； Leaf N； P
摘要: 分析贵州喀斯特山区无籽刺梨叶片全氮、全磷及其化学计量学特征随林龄(2、5、8年生)的变化，为研究无籽刺梨可持续发展提供理论基础。运用空间代时间的研究方法，选取立地条件相近的3个林龄的林分，研究无籽刺梨不同林龄叶片和土壤氮、磷生态化学计量学特征。研究结果表明：不同林龄无籽刺梨叶片氮、磷含量分别为24.27~28.47和1.87~3.17 g/kg；土壤氮、磷含量分别为1.62~2.99和0.25~1.38 g/kg。不同林龄无籽刺梨叶片和土壤氮、磷含量差异显著(P < 0.05)，且随林龄的增加氮磷含量呈下降趋势。三个不同林龄无籽刺梨叶片氮磷比分别为8.99、12.33和12.98，均小于14，表明研究区无籽刺梨生长主要受氮限制。研究结果可为贵州石漠化地区的生态功能恢复与植被重建提供科学依据。
Abstract: The analysis of the changes of total nitrogen, total phosphorus and stoichiometric characteristics of the leaves of Rosa kweichonensis var. sterilis in Guizhou karst mountainous area with forest age (2, 5, and 8 years old) provides a theoretical basis for the study of the sustainable development of Rosa kweichonensis var. sterilis. Using the research method of space and time, three stands of similar site conditions were selected to study the ecological stoichiometry of leaf and soil nitrogen and phosphorus of seedless prickly pear at different ages. The results of the study showed that the leaf nitrogen and phosphorus contents of seedless prickly pears of different forest ages were 24.27~28.47 and 1.87~3.17 g/kg; the soil nitrogen and phosphorus contents were 1.62~2.99 and 0.25~1.38 g/kg, respectively. The content of nitrogen and phosphorus in the leaves and soil of Rosa kweichonensis var. sterilis of different forest ages was significantly different (P < 0.05), and the nitrogen and phosphorus content showed a downward trend with the increase of forest age. The leaf nitrogen and phosphorus ratios of three different ages of Rosa kweichonensis var. sterilis were 8.99, 12.33 and 12.98, respectively, which were all lower than 14, indicating that the growth of seedless prickly pears in the study area was mainly limited by nitrogen. The research results can provide a scientific basis for the restoration of ecological functions and vegetation reconstruction in the rocky desertification areas of Guizhou.
文章引用：陈波, 吕文强, 王羽, 殷梦贵, 申咏. 喀斯特山区无籽刺梨叶片N、P化学计量学特征研究[J]. 土壤科学, 2022, 10(1): 24-30. https://doi.org/10.12677/HJSS.2022.101004

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