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- Title
翅荚木人工林不同径阶间细根主要功能性状 与根际土壤养分的关系.
- Authors
陈柳娟; 钟全林; 李宝银; 姚湘明; 徐朝斌; 程栋梁; 郑跃芳; 余 华
- Abstract
Fine roots are sensitive to changes in the soil environment, and play an important role in plant growth and development. To clarify the relationship between fine root traits and rhizosphere soil nutrient characteristics, fine roots of trees belonging to different diameter classes in six-year-old Zenia insignis plantation were sampled. The results showed that root biomass, root length density and root volume density increased with the increases of diameter class. Specific root length and specific root area showed the trend of first rising and then falling and rising again with the increases of diameter class. Root tissue density did not change with diameter class. There were significant differences in soil pH, water content, total carbon, total phosphorus, ammonium nitrogen, nitrate nitrogen and total available nitrogen contents of rhizosphere soil belonging to different diameter classes. The concentrations of soil total carbon, total nitrogen, nitrate nitrogen and total available nitrogen in the rhizosphere soil of large diameter trees were relatively higher, while the soil water content, total phosphorus and ammonium nitrogen contents of small diameter trees were relatively higher. The concentrations of soil total nitrogen, total carbon, nitrate nitrogen and total available nitrogen were significantly positively correlated with root biomass, root length density and root volume density. The concentrations of soil total phosphorus was significantly positively correlated with root tissue density of fine roots, but negatively correlated with specific root length and specific root area. Soil water content was significantly positively correlated with root biomass and root volume density. Soil pH was significantly positively correlated with the specific root length and specific root area of fine roots, but negatively correlated with root tissue density. Our results provide scientific basis for the selection of excellent germplasm resources of Z. insignis.
- Subjects
NITROGEN in soils; SOIL moisture; GERMPLASM; SOIL acidity; PLANT growth; RHIZOSPHERE
- Publication
Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao, 2019, Vol 30, Issue 11, p3627
- ISSN
1001-9332
- Publication type
Article
- DOI
10.13287/j.1001-9332.201911.006