构型性状
Architectural trait | 根长密度
Root length density | RLD (cm·cm-3) | 单位体积土壤中的根长, 反映根系对养分获取的能力
The length of roots per unit soil volume, reflects the ability of the roots to acquire nutrients |
根分支强度
Root branching intensity | RBI (cm-1) | 单位2级根长度上的1级根数量, 反映根系从土壤中获取水分和养分的能力
The number of laterals on a given length unit of parent root, reflects the ability of the root to explore the soil for water and nutrients |
根分布深度
Root depth | RD (cm) | 反映植物吸收与利用土壤资源的能力
Reflects the ability of the plant to acquire soil resources |
形态性状
Morphological trait | 根直径
Root diameter | D (mm) | 影响根资源获取、生理功能
Affects the root resource acquisition and physiological function |
比根长
Specific root length | SRL (m·g-1) | 单位生物量的根长度, 反映根系吸收水分和养分的能力, 衡量根系的消耗与效益
The length of root per unit dry mass, reflects the potential extent of soil exploration (for nutrients and water) per unit cost (in terms of plant biomass allocation) and measures the root consumption and benefits |
比根面积
Specific root area | SRA (g·cm-2) | 单位生物量的根面积, 反映根系对土壤资源的获取能力
The area of root per unit dry mass, reflects the ability of the root to acquire soil resources |
根组织密度
Root tissue density | RTD (g·cm-3) | 单位体积的根质量, 反映根系资源获取和防御能力
Root mass per unit volume, reflects the root resource acquisition and defense capability |
根干物质含量
Root dry matter content | RDMC (mg·g-1) | 单位鲜质量的根干质量, 反映根系的资源获取能力
The dry mass of root per unit fresh root mass, reflects the ability of root system to acquire soil resources |
生理性状
Physiological trait | 根寿命
Root lifespan | (d) | 单位生物量的根系组织存活的时间, 决定根系养分和碳消耗与循环的速率, 属于硬性状
The survival time of root tissue per unit of biomass, determines the rate at which root nutrients and carbon are consumed and recycled, hard trait |
根系呼吸速率
Root respiration rate | Rr (μmol·g-1·s-1) | 单位根质量和时间内CO2通量, 属于硬性状
The flux rate of CO2 per unit root mass and time, hard trait |
根系分泌速率
Root exudation rate | RER (mg·g-1·h-1) | 单位根质量和时间内根系分泌碳通量, 属于硬性状
The flux rate of root exudates was calculated by dividing the total carbon content by incubation time and root dry mass, hard trait |
根系磷酸酶活性
Root phosphatase activity | RPA (μmol·g-1·h-1) | 单位根质量和时间内磷酸单脂酶含量
The content of phosphomonoesterase in per unit root dry mass and time |
生物性状
Biotic trait | 菌根侵染率
Mycorrhizal fungal colonization | RLC (%) | 菌根真菌的侵染比例
The proportion of mycorrhizal colonization |
菌丝密度
Hyphal length density | HLD (m·g-1) | 单位土干质量的菌丝长度
The length of fungal hypha per unit of dry soil mass |
化学性状
Chemical trait | 根碳含量
Root carbon content | RC (mg·g-1) | 单位根干质量的碳含量, 影响根资源获取及代谢速率
The mass of carbon content per root dry mass, affects the root resource acquisition and metabolic rate |
根氮含量
Root nitrogen content | RN (mg·g-1) | 单位根干质量的氮含量, 影响根资源获取及代谢速率
The mass of nitrogen content per root dry mass, affects the root resource acquisition and metabolic rate |
解剖性状
Anatomical trait | 皮层厚度
Cortical thickness | CT (mm) | 反映根系对土壤资源的获取能力
Reflects the ability of the root to acquire soil resources |
中柱直径
Stele diameter | SD (mm) | 反映根系对土壤养分的运输能力
Reflects the ability of the root to transport soil resources |