新疆不同草地类型生物量与根冠比特征
Characteristics of Biomass and Root-Shoot Ratio of Different Grassland Types in Xinjiang
董萍 1井长青 1王公鑫 1邵玉庆2
作者信息
- 1. 新疆农业大学 草业学院,新疆草地资源与生态重点实验室,西部干旱荒漠区草地资源与生态教育部重点实验室,乌鲁木齐 830052
- 2. 新疆农业大学 资源与环境学院,乌鲁木齐 830052
- 折叠
摘要
为明确新疆不同草地类型的根系特征及地上/地下生物量分配关系.2019-2023年,于每年7月采集了新疆9种主要草地类型的生物量数据,通过对比各个草地类型的地上/地下生物量差异,对根冠比进行定量分析,从而揭示生物量分配的规律和特点.结果表明,新疆低平地草甸地上生物量均值高,达到169.22 g/m2,山地草甸次之(163.43 g/m2),高寒草原、温性草原化荒漠、温性荒漠和温性荒漠草原的地上生物量均值较低,均低于60 g/m2.各草地类型地下生物量值在0～5 cm土层最高,随土层深度的增加逐渐减少;进一步分析发现,草地根系主要集中在0～50 cm土层,占比均在77%以上.各草地类型的根冠比均值范围为10.55至40.40.
Abstract
To clarify the relationship between the root system characteristics and the aboveground/below-ground biomass distribution of different grassland types.Biomass data from Xinjiang's nine major grass-land types in July of each year from 2019 to 2023 were collected and root-shoot ratios quantified by compa-ring aboveground/belowground biomass differences among grassland types to reveal patterns and charac-teristics of biomass allocation.The results showed that the mean value of lowland meadow aboveground biomass was as high as 169.22 g/m2,followed by montane meadow aboveground biomass(163.43 g/m2),while the mean value of alpine steppe,temperate steppe desert,temperate desert,and temperate desert steppe aboveground biomass was lower than 60 g/m2.Additionally,the value of belowground biomass of each grassland type was the highest in the surface soil layer(0-5 cm)and gradually decreased as the soil depth increased.Further research showed that the root system of grasslands was primarily concentrated in soil depths of 0-50 cm,accounting for more than 77%of the total.The mean root-shoot ratio values ranged from 10.55 to 40.40 for each grassland type.
关键词
生物量/根冠比/草地类型Key words
biomass/root-to-shoot ratio/grassland types引用本文复制引用
基金项目
新疆维吾尔自治区林草局科技项目(XJCYZZ2023ZB01)
新疆维吾尔自治区林草局科技项目(XJCYZZ202305)
出版年
2023
NETL
NSTL
万方数据