城市绿化植物-凋落物-土壤系统碳氮磷化学计量特征研究
发布时间：2019-03-13 14:09
【摘要】：以福建福州市常见的15种乔木、灌木和草本绿化植物为对象,连续2年取样测定了这些植物、凋落物、立地土壤、土壤微生物量C、N、P含量,探讨城市绿化植物-凋落物-土壤系统生态化学计量特征,为中国城市绿化植物的生态功能恢复与植被重建提供科学依据。结果表明:(1)绿化植物不同器官C、N、P含量均表现为草本灌木乔木、C含量N含量P含量、叶茎根,呈现出叶的富集作用;绿化植物各器官化学计量比(C/N、C/P、N/P)也表现出基本一致的乔木灌木草本的变化趋势;各绿化植物对N的再吸收率极显著高于对P的再吸收率(P0.01),绿化植物N和P再吸收率表现为乔木灌木草本,不同绿化植物对N的再吸收率差异均显著(P0.05),对P的再吸收率差异均不显著(P0.05)。(2)绿化植物凋落物C、N、P含量基本表现为草本灌木乔木,其中不同绿化植物凋落物P含量差异不显著。(3)绿化植物立地土壤C、N、P含量表现为草本灌木乔木,但其N/P差异不显著;土壤微生物量C、N、P含量基本表现为草本灌木乔木,其相应的C/N、C/P、N/P差异均不显著。(4)植物-土壤-凋落物-土壤微生物量(C、N、P)均随着生长季温度的升高而降低,随着年降水量的增加而升高,P素的回归系数绝对值明显低于C素和N素;植物-凋落物-土壤的C与N含量、N与P含量、C/P与N/P、以及土壤和植物的C/N与N/P之间均呈显著正相关关系,而凋落物的C/N与N/P之间呈显著负相关关系;典范对应CCA排序中,植物高度、冠幅、茎粗、比叶面积和叶面积指数对植物-凋落物-土壤-土壤微生物量C、N、P含量和C/N、C/P和N/P具有较大影响作用,其中高度、冠幅和茎粗与比叶面积和叶面积指数呈负相关关系,与凋落物-土壤-土壤微生物量C、N、P含量呈负相关关系,与植物C、N、P含量呈正相关关系;而凋落物-土壤-土壤微生物量C、N、P含量与其C/N、C/P和N/P均具有一定的正相关关系。
[Abstract]:The contents of microbial biomass C, N, P in 15 common species of trees, shrubs and herbs in Fuzhou City, Fujian Province, were measured by sampling for 2 consecutive years, including litter, site soil, soil microbial biomass C, N, P, and soil microbial biomass (C, N, P). The ecological stoichiometric characteristics of urban greening plant-litter-soil system were discussed in order to provide scientific basis for ecological function restoration and vegetation reconstruction of urban greening plants in China. The results were as follows: (1) the contents of C, N and P in different organs of greening plants were herbaceous shrub trees, C content N content P content, leaf stem root content, showing leaf enrichment; The stoichiometric ratios (C _ (N), C _ (P), N _ (P) of the organs of green plants also showed the same trend of change of shrub herbs. The reabsorption rate of N in greening plants was significantly higher than that of P (P0.01). The reabsorption rates of N and P in greening plants were trees, shrubs and herbs, and the reabsorption rates of N in different greening plants were significantly higher than those of P (P0.05), and the reabsorption rates of N and P in greening plants were significantly higher than those of P (P0.01). The difference of P reabsorption rate was not significant (P0.05). (2). The contents of C, N and P in greening plant litter were basically herbaceous shrub trees. (3) the content of C, N, P in the soil of green plant site showed herbaceous shrub trees, but there was no significant difference in P content of litter in different greening plants. (3) the content of N, N and P in the soil of greening plant site was not significantly different from that of herbaceous shrub trees. The contents of soil microbial biomass C, N, P were basically herbaceous shrub trees, and there was no significant difference between them. (4) Plant-soil-litter-soil microbial biomass (C, N, P). P) decreased with the increase of temperature in growing season, and increased with the increase of annual precipitation, and the absolute value of P-element regression coefficient was obviously lower than that of C-element and N-element; There were significant positive correlations between C and N, N and P, C / N and N / P in plant-litter-soil, and C / N and N / N in soil and plant, and there was significant positive correlation between C and N, C / P, C / N and N / P in soil and plant. There was a significant negative correlation between C _ (N) and N _ (P) in litter. In the canonical CCA sequence, plant height, crown width, stem diameter, specific leaf area and leaf area index had significant effects on plant-litter-soil microbial biomass C, N, P content and C, C and N P. Height, crown width and stem diameter were negatively correlated with specific leaf area and leaf area index, litter-soil microbial biomass C, N, P content, and plant C, N, P content were positively correlated. The litter-soil microbial biomass C, N, P contents were positively correlated with C / N, C / P and N / P contents.
【作者单位】： 福州大学建筑学院;厦门大学建筑与土木工程学院;
【基金】：福建省自然科学基金面上项目(2016J01732)
【分类号】：S154.4
[Abstract]:The contents of microbial biomass C, N, P in 15 common species of trees, shrubs and herbs in Fuzhou City, Fujian Province, were measured by sampling for 2 consecutive years, including litter, site soil, soil microbial biomass C, N, P, and soil microbial biomass (C, N, P). The ecological stoichiometric characteristics of urban greening plant-litter-soil system were discussed in order to provide scientific basis for ecological function restoration and vegetation reconstruction of urban greening plants in China. The results were as follows: (1) the contents of C, N and P in different organs of greening plants were herbaceous shrub trees, C content N content P content, leaf stem root content, showing leaf enrichment; The stoichiometric ratios (C _ (N), C _ (P), N _ (P) of the organs of green plants also showed the same trend of change of shrub herbs. The reabsorption rate of N in greening plants was significantly higher than that of P (P0.01). The reabsorption rates of N and P in greening plants were trees, shrubs and herbs, and the reabsorption rates of N in different greening plants were significantly higher than those of P (P0.05), and the reabsorption rates of N and P in greening plants were significantly higher than those of P (P0.01). The difference of P reabsorption rate was not significant (P0.05). (2). The contents of C, N and P in greening plant litter were basically herbaceous shrub trees. (3) the content of C, N, P in the soil of green plant site showed herbaceous shrub trees, but there was no significant difference in P content of litter in different greening plants. (3) the content of N, N and P in the soil of greening plant site was not significantly different from that of herbaceous shrub trees. The contents of soil microbial biomass C, N, P were basically herbaceous shrub trees, and there was no significant difference between them. (4) Plant-soil-litter-soil microbial biomass (C, N, P). P) decreased with the increase of temperature in growing season, and increased with the increase of annual precipitation, and the absolute value of P-element regression coefficient was obviously lower than that of C-element and N-element; There were significant positive correlations between C and N, N and P, C / N and N / P in plant-litter-soil, and C / N and N / N in soil and plant, and there was significant positive correlation between C and N, C / P, C / N and N / P in soil and plant. There was a significant negative correlation between C _ (N) and N _ (P) in litter. In the canonical CCA sequence, plant height, crown width, stem diameter, specific leaf area and leaf area index had significant effects on plant-litter-soil microbial biomass C, N, P content and C, C and N P. Height, crown width and stem diameter were negatively correlated with specific leaf area and leaf area index, litter-soil microbial biomass C, N, P content, and plant C, N, P content were positively correlated. The litter-soil microbial biomass C, N, P contents were positively correlated with C / N, C / P and N / P contents.
【作者单位】： 福州大学建筑学院;厦门大学建筑与土木工程学院;
【基金】：福建省自然科学基金面上项目(2016J01732)
【分类号】：S154.4
【相似文献】
相关期刊论文 前10条
1 宋新章;江洪;张慧玲;余树全;周国模;马元丹;Scott X. Chang;;全球环境变化对森林凋落物分解的影响[J];生态学报;2008年09期
2 王相娥;薛立;谢腾芳;;凋落物分解研究综述[J];土壤通报;2009年06期
3 曲浩;赵学勇;赵哈林;王少昆;;陆地生态系统凋落物分解研究进展[J];草业科学;2010年08期
4 许湘琴;林植华;陈慧丽;;凋落物分解对土壤生物的影响[J];生态学杂志;2011年06期
5 王苗苗;侯扶江;;草地凋落物分解的主要影响因素[J];草业科学;2012年10期
6 石福臣,丁宝永,闰秀峰,朱廷栋;三江平原天然次生柞木林凋落物分解规律的研究[J];东北林业大学学报;1990年S3期
7 莫江明,孔国辉,Sandra BROWN,方运霆,张佑昌;鼎湖山马尾松林凋落物及其对人类干扰的响应研究[J];植物生态学报;2001年06期
8 陈金林,吴春林,姜志林,许新建;栎林生态系统凋落物分解及磷素释放规律[J];浙江林学院学报;2002年04期
9 邵玉琴 ,赵吉 ,杨R，
本文编号：2439452
本文链接：https://www.wllwen.com/kejilunwen/nykj/2439452.html
