不同种源和家系红皮云杉细根形态与生物量垂直分布特征

高艳如; 王军辉; 麻文俊; 王福德; 安三平; 谷加存

不同种源和家系红皮云杉细根形态与生物量垂直分布特征

1. 东北林业大学林学院,森林生态系统可持续经营教育部重点实验室;
2. 中国林业科学研究院林业研究所,林木遗传育种全国重点实验室,国家林业和草原局林木培育重点实验室;
3. 黑龙江省林业科学研究所;
4. 甘肃省小陇山林业科学研究所,甘肃省次生林培育重点实验室

基金项目:

国家“十四五”重点研发计划课题(2022YFD2200303)

详细信息

作者简介:
高艳如(1999—),女,硕士研究生,主要从事森林培育研究

通讯作者:
谷加存,E-mail:gjcnefu@163.com

中图分类号: S791.182
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出版历程
- 收稿日期: 2024-01-30
- 刊出日期: 2024-05-19

Characteristics of Fine Root Morphology and Biomass Vertical Distribution from Different Provenances and Families of Picea koraiensis

1. Key Laboratory of Sustainable Forest Ecosystem Management of Ministry of Education,School of Forestry University;
2. Key laboratory of Tree Breeding and Cultivation of the National Forestry and Grassland Administration,State Key Laboratory of Tree Genetics and Breeding,Research Institute of Forestry,Chinese Academy of Forestry;
3. Institute of Forestry Science of Heilongjiang Province;
4. Provincial Key Laboratory of Secondary Forest Cultivation,Gansu Xiaolongshan Mountain Research Institute of Forestry

摘要

摘要: 为揭示不同种源和家系红皮云杉（Picea koraiensis）细根（直径≤2 mm）形态和生物量垂直分布特征，以黑龙江省林口县青山林场4个种源（纬度从低到高分别为穆棱、林口、金山屯、乌伊岭）30个家系的24年生红皮云杉试验林为研究对象，采用根钻法研究了不同土壤深度（h）(表层：0 -2，其中林口种源细根生物量最大(39.04 g·m ^-2)，金山屯种源细根生物量最小(32.52 g·m ^-2)，呈现出非连续的地理变异。细根生物量均随土层的加深而减小，土壤表层根系生物量占总生物量的比例平均为77%。相比较，低纬度的穆棱种源各家系细根生物量在土壤亚表层和底层分布比例较高，高纬度的乌伊岭和金山屯种源各家系细根生物量在土壤表层分布比例较高，表明温度较低地区的红皮云杉倾向于将细根分布在资源丰富的土壤表层。
- 红皮云杉 /
- 种源 /
- 家系 /
- 细根形态 /
- 细根生物量
Abstract: In order to reveal the characteristics of fine root（diameter ≤2 mm） morphology and vertical distribution of biomass from different provenances and families of 24-year-old Picea koraiensis, the soil core method was used to determine fine root morphology and biomass at different soil layers（surface layer: 0＜h≤10 cm, subsurface layer: 10 cm＜h≤20 cm, bottom layer: 20 cm＜h≤30 cm） in 30 families from four provenances（Muling, Linkou, Jinshantun, and Wuyiling from low to high latitude） in Qingshan Forest Farm, Linkou County, Heilongjiang Province, China. The results showed that there were significant differences in all fine root morphological traits among different provenances, and specific root length and root tissue density exhibited significant differences among families within provenance. At the provenance level, the average root diameter of Wuyiling provenance was the thickest at all soil layers, whereas specific root length and root tissue density of Linkou provenance were the largest. At the family level, in 0＜h≤10 cm soil layer, root diameter of W035 was the thickest, that of CK-2 was the thinnest, specific root length of CK-2 was the longest, that of W043 was the shortest, root tissue density of J082 was the highest, that of M515 was the lowest. Root tissue density and specific root length of different provenances and families of P. koraiensis decreased with the increase of soil layer, while root diameter increased. The total fine root biomass（all three soil layers） across the four provenances was 33.56 g·m^-2 on average, with the maximum occurring in Linkou provenance(39.04 g·m^-2) and the minimum in Jinshantun provenance(32.52 g·m^-2), showing inconsecutive geographical distribution. Fine root biomass decreased with soil layer increasing, and root biomass at the surface soil layer accounted for 77%of the total biomass on average. In comparison, the low-latitude provenance of Muling tended to distribute greater fine root biomass at the subsurface and bottom soil layers, while the high-latitude provenances of Wuyiling and Jinshantun had higher fine root biomass at the surface soil layer, indicating that P. koraiensis originated from cold site tended to allocate more fine roots at the fertile surface soil.
- Picea koraiensis /
- provenance /
- family /
- fine root morphology /
- fine root biomass

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