云南松苗木氮磷钾化学计量比与个体大小间相对关系

doi:10.13292/j.1000-4890.202405.043

生态学杂志 ›› 2024, Vol. 43 ›› Issue (5): 1300-1306.doi: 10.13292/j.1000-4890.202405.043

云南松苗木氮磷钾化学计量比与个体大小间相对关系

蔡年辉^1,2*,胡兆柳^1,2,贺斌³,成思丽^1,2,陈林^1,2,唐军荣^1,2,陈诗^1,2,许玉兰^1,2

（¹西南林业大学西南地区生物多样性保育国家林业局重点实验室，昆明 650224; ²西南林业大学西南山地森林资源保育与利用教育部重点实验室，昆明 650224; ³云南交通职业技术学院，昆明 650500）

出版日期:2024-05-10 发布日期:2024-07-10

Allometric relationship between the stoichiometric ratio of nitrogen, phosphorus, potassium and plant size of Pinus yunnanensis seedlings.

CAI Nianhui^1,2, HU Zhaoliu^1,2, HE Bin³, CHENG Sili^1,2, CHEN Lin^1,2, TANG Junrong^1,2, CHEN Shi^1,2, XU Yulan^1,2#br#

#br#

(¹Key Laboratory of Biodiversity Conservation in Southwest China, State Forestry Administration, Southwest Forestry University, Kunming 650224, China; ²Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China Southwest Forestry University, Ministry of Education, Kunming 650224, China; ³Yunnan Communications Vocational and Technical College, Kunming 650500, China).

Online:2024-05-10 Published:2024-07-10

摘要/Abstract

摘要： 为探讨云南松苗木氮磷钾含量及其化学计量比与苗木个体大小间的相对关系，本研究以2年生云南松苗木为对象，对根、茎、叶、单株生物量及氮磷钾含量进行测定，分析各器官及单株生物量与氮磷钾含量、化学计量比（N∶P、N∶K、P∶K）之间的关系，并构建拟合模型。结果表明，氮磷钾含量均表现为叶>茎>根，各器官及单株的营养元素含量均表现为钾>氮>磷。化学计量比在各器官间表现不一，叶具有较高的N∶P、N∶K，根具有较低的N∶P、N∶K和较高的P∶K，茎的N∶P、N∶K居中，茎、叶中的P∶K接近。各器官及单株生物量与营养元素含量呈极显著正相关（P<0.01）。根、茎、叶、单株的N∶P与个体大小间呈负相关，根、茎、叶、单株的P∶K与个体大小呈正相关，根、茎、叶、单株的N∶K与个体大小的关系不一，其中叶、单株的N∶K与个体大小呈负相关，根、茎的N∶K与个体大小呈正相关。并进一步构建了云南松苗木氮磷钾含量及其化学计量比与生物量间的拟合模型。研究结果揭示了云南松苗木氮磷钾含量及其化学计量与个体大小间相对关系的变化特征。

关键词: C∶N∶P, 营养元素, 生物量, 异速生长

Abstract: The aim of this study was to examine the allometric relationships among nutrient elements including nitrogen (N), phosphorus (P), potassium (K) contents and their stoichiometric ratios (N∶P, N∶K, P∶K) and the size of two-years-old Pinus yunnanensis seedlings. Biomass of root, stem, needle and individual plant, and the contents of N, P, K were measured. The relationships were analyzed and the fitting models were built between biomass and nutrient element contents and stoichiometric ratios. The results showed that N, P, K contents were characterized by needle>stem>root, and that the nutrient contents of all organs and individual plant were characterized by K>N>P. The stoichiometric ratios differed among organs. We found higher N∶P and N∶K in needle, lower N∶P and N∶K in root, higher P∶K in root, and middle N∶P and N∶K in stem. P∶K in stem and needle was similar. There were significant positive correlations between biomass and nutrient contents in root, stem, needle and individual plant (P<0.01). Nutrient contents increased with increasing seedling size (biomass). There were negative correlations between N∶P ratios and biomass in root, stem, needle and individual plant. There were positive correlations between P∶K ratios and biomass in root, stem, needle and individual plant. The relationships between N∶K and biomass were different in root, stem, needle and individual plant. N∶K was negatively correlated with biomass in needle and individual plant, but positively correlated with biomass in root and stem. The fitting models were constructed between nutrient contents and biomass, and between stoichiometric ratios and biomass. Our results revealed that the characteristics of N, P, K contents and seedling size, and the allometric relationships between stoichiometric ratios and seedling size of P. yunnanensis seedlings.

Key words: C∶N∶P, nutrient element, biomass, allometric growth

蔡年辉, 胡兆柳, 贺斌, 成思丽, 陈林, 唐军荣, 陈诗, 许玉兰. 云南松苗木氮磷钾化学计量比与个体大小间相对关系[J]. 生态学杂志, 2024, 43(5): 1300-1306.

CAI Nianhui, HU Zhaoliu, HE Bin, CHENG Sili, CHEN Lin, TANG Junrong, CHEN Shi, XU Yulan. Allometric relationship between the stoichiometric ratio of nitrogen, phosphorus, potassium and plant size of Pinus yunnanensis seedlings.[J]. Chinese Journal of Ecology, 2024, 43(5): 1300-1306.

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云南松苗木氮磷钾化学计量比与个体大小间相对关系

Allometric relationship between the stoichiometric ratio of nitrogen, phosphorus, potassium and plant size of Pinus yunnanensis seedlings.

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