文章摘要
成祥, 付登高, 何高迅, 张雅静, 禹明慧, 王越, 刘嫦娥, 段昌群.滇中富磷区与贫磷区云南松群落差异与土壤磷素研究[J].水土保持学报,2021,35(6):285~292
滇中富磷区与贫磷区云南松群落差异与土壤磷素研究
Differences of Pinus yunnanensis Community and Soil Phosphorus Between Phosphorus-rich and Phosphorus-poor Areas of Central Yunnan
投稿时间:2021-06-24  
DOI:10.13870/j.cnki.stbcxb.2021.06.039
中文关键词: 富磷区  土壤有效磷  土壤养分  云南松群落  群落结构  生物多样性
英文关键词: phosphorus rich area  soil available phosphorus  soil nutrients  Pinus yunnanensis community  community structure  biodiversity
基金项目:国家自然科学基金项目(U2002208);云南省重点研发计划项目(2019BC001)
作者单位E-mail
成祥1,2, 付登高1,2, 何高迅1,2, 张雅静1,2, 禹明慧1,2, 王越1,2, 刘嫦娥1,2, 段昌群1,2 1. 云南大学生态与环境学院, 昆明 650000

2. 云南省高原山地生态与退化环境修复重点实验室
, 昆明 650000 
chqduan@ynu.edu.cn 
摘要点击次数: 86
全文下载次数: 68
中文摘要:
      以同在滇中地区磷素差异较大的富磷区与贫磷区的云南松林群落及其土壤为研究对象,采用Sui修正后的Hedley磷素分级,研究了土壤磷素的有效磷特征和土壤其他养分因子,分析了2类云南松群落的结构及其差异。结果表明,富磷区土壤全磷含量显著高于贫磷区,虽然两地活性磷(H2O—Pi、NaHCO3—Pi和NaHCO3—Po)含量都低于10%,但富磷区活性磷含量显著高于贫磷区,贫磷区有机磷含量高于无机磷含量,富磷区却相反;富磷区其他土壤养分如全氮、有机碳含量也显著高于贫磷区。富磷区云南松群落林木密度、Shannon-wiener指数、Simpson指数、Pielou指数均高于贫磷区云南松群落,而平均株高、平均胸径、冠幅低于贫磷区云南松群落。讨论认为,在贫磷区云南松与富磷区云南松群落的生长发育与营养策略有关,在磷素匮乏的地区,植物群落为了维持正常生长而进行紧密磷素循环,植物和微生物主要利用的磷素来自有机磷的矿化与溶解,并最大限度地减少生物地球化学循环的磷损失;但在磷素极其充沛的地区植物和微生物群落更加倾向将磷素从土壤矿石转移到生物地球化学磷循环中,对于当地植物和微生物来说,紧密的磷素回收就显得无关紧要。两地云南松群落结构的显著差异与地表磷素含量关系密切,富磷区因土壤磷含量丰富,并且引起其他营养资源丰富,从而能够维持更多种类的植物,同时相应地降低云南松在群落的生态优势;相应地贫磷区磷素成为限制因素,并且其他营养资源也相对短缺,从而不能支持更高水平的植物多样性,云南松因具有较强竞争力而生态优势更高。
英文摘要:
      In this study, Pinus yunnanensis communities and their soils in the two places (phosphorus-rich area and phosphorus-poor area) with large differences in phosphorus content in Central Yunnan were taken as the research objects. The Hedley phosphorus classification revised by Sui was used to study the available phosphorus characteristics of soil phosphorus and other soil nutrient factors, and the structure and differences of two types of P. yunnanensis communities were analyzed. The results showed that the total phosphorus content in the phosphorus-rich area was significantly higher than that in the phosphorus-poor area. Although the contents of active phosphorus (H2O—Pi, NaHCO3—Pi, and NaHCO3—Po) were lower than 10% in both areas, the active phosphorus content in the phosphorus-rich area was significantly higher than that in the phosphorus-poor area. In the phosphorus-poor area, the content of organic phosphorus was higher than that of inorganic phosphorus, but it was the opposite in the phosphorus-rich area. The contents of other soil nutrients such as total nitrogen and organic carbon in the phosphorus-rich area were also significantly higher than those in the phosphorus-poor area. The forest density, Shannon-wiener index, Simpson index and Pielou index of P. yunnanensis community in the phosphorus-rich area were all higher than those in the phosphorus-poor area, while the average plant height, average DBH and crown width were all lower than those in the phosphorus-poor area. The growth and development of P. yunnanensis communities in phosphorus-poor areas and phosphorus-rich areas were related to nutrition strategies. In phosphorus-deficient areas, plant communities carried out a tight phosphorus cycle to maintain normal growth. Phosphorus mainly used by plants and microorganisms came from the mineralization and dissolution of organic phosphorus, and the phosphorus loss was minimized in the biogeochemical cycle. However, in areas where phosphorus was extremely abundant, plant and microbial communities were more inclined to transfer phosphorus from soil ores to the biogeochemical phosphorus cycle. For local plants and microbes, tight phosphorus recovery was irrelevant. The significant difference in the community structure of P. yunnanensis between the two places was closely related to the phosphorus content on the ground. Phosphorus-rich areas were rich in soil phosphorus and other nutrient resources, which was able to maintain more kinds of plants and correspondingly reduce the ecological advantages of P. yunnanensis in the communities. Accordingly, phosphorus had become a limiting factor in phosphorus-poor areas, and other nutrient resources were also relatively short, which could not support a higher level of plant diversity. P. yunnanensis had a higher ecological advantage because of its strong competitiveness.
查看全文   查看/发表评论  下载PDF阅读器
关闭