文献类型：期刊文献

中文题名：广西大青山杉木人工林碳氮磷生态化学计量特征

英文题名：Stoichiometry of carbon, nitrogen, and phosphorus of Chinese fir plantations in Daqing Mountain, Guangxi

作者：胡小燕[1] 段爱国[1] 张建国[1,2] 杜海伦[1] 张雄清[1] 郭文福[3] 孙建军[4]

第一作者：胡小燕

机构：[1]中国林业科学研究院林业研究所,国家林业局林木培育重点实验室,林木遗传育种国家重点实验室,北京100091;[2]南京林业大学南方现代林业协同创新中心,南京210037;[3]中国林科院热带林业实验中心,凭祥532600;[4]中国林科院亚热带林业实验中心,分宜336600

年份：2020

卷号：40

期号：4

起止页码：1207-1218

中文期刊名：生态学报

外文期刊名：Acta Ecologica Sinica

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD2019_2020】；

基金：国家自然科学基金面上项目(31570619);国家“十二·五”科技计划课题(2015BAD09B0101);国家“十三·五”重点研发计划课题(2016YFD0600302)

语种：中文

中文关键词：杉木;化学计量特征;植物;凋落物;土壤;初植密度

外文关键词：Chinese fir;stoichiometric characteristic;plant;litter;soil;planting density

分类号：S71

摘要：为研究杉木人工林生态系统植物、凋落物和土壤碳(C)、氮(N)、磷(P)生态化学计量特征的差异和相互关系,以广西大青山杉木密度试验林为研究对象,测定了5种初植密度下杉木人工林针叶、草本、凋落物和土壤的C、N、P含量及其比值。结果表明:针叶的C、N、P含量最高,凋落物次之,土壤最低。C∶N、C∶P表现为凋落物>针叶>草本>土壤,N∶P表现为凋落物>草本>针叶>土壤。其中针叶的N∶P均值为16.69,凋落物C∶N显著高于N发生释放的C∶N的临界值(30)。杉木人工林针叶和草本N、C∶N呈显著负相关关系,针叶和土壤的C∶N、N∶P,草本和凋落物P含量、C∶P均呈显著正相关关系,体现了杉木生态系统内的C、N、P在针叶、草本、凋落物和土壤之间相互转化和循环。南亚热带杉木人工林植物生长受P限制,凋落物分解慢,土壤有机质的矿化作用慢,养分循环能力低,因此在人工林抚育管理中,应保护林下植被,适当施肥,提高土壤肥力,维持杉木林长期生产力。
The main objective of this study is to understand the relationship of nutrient elements and stoichiometry characteristics of carbon, nitrogen, and phosphorus in needle, herb, litter and soil of mature Chinese fir plantation ecosystem. The study was conducted at Daqingshan forest farm, the contents of C, total N, and total P in needle, herb, litter, and soil(10-100 cm soil layers) of Cunninghamia lanceolata(Lamb.) Hook. The mature plantation under five different planting densities were measured. The C∶N, C∶P, and N∶P ratios were estimated. The results indicated that C, N and P contents followed the order of older needle > litter > soil. The rank of the C∶N, C∶P was litter > needle > herb > soil, and the rank of the N∶P was litter > herb > needles >soil. The ratio of N∶P of needle was 16.69. The C∶N radio of litter was significantly higher than the critical value of C∶N released by N(30). There was a significantly negative correlation between needle and herb N, C∶N. The radios of N∶P and C∶P between needle and soil, as well as P content and C∶P between herb and litter showed a significantly positive correlation. It indicated that the C, N, and P in the Chinese fir ecosystem were transformed and recycled among needle, herb, litter, and soil. We found that the growth of the Chinese fir plantation in the south subtropical zone was limited by P. The decomposition of litter and mineralization of organic matter were slow. The nutrient cycling ability was low. Therefore, it is necessary to protect undergrowth vegetation, apply fertilizer appropriately, improve soil fertility, and maintain the long-term productivity of the Chinese fir plantation.