气候变化领域集成服务门户(CCPortal): Physiological Nitrogen Uptake and Utilisation Responses in Two Native Plants from the Qinghai-Tibet Plateau under Different Water and Fertiliser Conditions

CCPortal

DOI	10.3390/agronomy14030440
	Physiological Nitrogen Uptake and Utilisation Responses in Two Native Plants from the Qinghai-Tibet Plateau under Different Water and Fertiliser Conditions
	Wang, Xiangtao; Zhang, Chao; Zhao, Ningning; Sun, Xingrong; Hou, Shuai; Wang, Puchang
发表日期	2024
EISSN	2073-4395
起始页码	14
结束页码	3
卷号	14 期号:3
英文摘要	Drought and poor soil quality are the main characteristics of extreme environments in arctic-alpine areas. Understanding how herbaceous plants in alpine grasslands maintain the normal supply and utilisation of nutrients under different rainfall conditions is key to maintaining population stability. In the present study, the native plants Poa crymophila and Stipa purpurea of the Qinghai-Tibet Plateau were used to conduct a controlled experiment involving water and fertiliser to analyse their physiological responses in terms of nutrient uptake and utilisation. The results showed that decreased soil moisture increased proline and non-structural carbohydrates in P. crymophila, mainly accumulating in the leaves and stems. Nitrogen (N) addition promoted proline accumulation, whereas nonstructural carbohydrate content decreased. However, the proline and non-structural carbohydrate contents of S. purpurea were less affected by water and fertiliser. Additionally, drought restricted rhizospheric and non-rhizospheric alkaline-hydrolysed N release, increased rapidly available phosphorus (RAP) content in rhizospheric soil, limited root growth, and reduced surface area, root length, and root volume. Both aboveground and underground N fertiliser utilisation rates decreased. Under well-hydrated conditions (WH), high N levels increased rhizospheric alkaline-hydrolysed N and urease activity while inhibiting RAP and activity of alkaline phosphatase contents, thereby limiting root growth and reducing N fertiliser utilisation. The results indicate that both plant species have relatively low overall nutrient requirements that are limited mainly by water availability. The addition of low amounts of fertiliser is beneficial for nutrient release and utilisation, improving their adaptability to arctic-alpine environments and their suitability and superiority in the community. This study has significant implications for nutrient management and ecological restoration measures in arctic-alpine grasslands.
英文关键词	native plants; nutrient utilisation; nitrogen utilisation efficiency; physiological adaptability; root characteristics; water-fertiliser coupling
语种	英语
WOS研究方向	Agriculture ; Plant Sciences
WOS类目	Agronomy ; Plant Sciences
WOS记录号	WOS:001191625000001
来源期刊	AGRONOMY-BASEL
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/290541
作者单位	Guizhou Normal University; Northwest A&F University - China; Chinese Academy of Sciences; Institute of Soil & Water Conservation (ISWC), CAS; Ministry of Water Resources; Lanzhou University; Tibet Agriculture & Animal Husbandry University; Northwest A&F University - China
推荐引用方式 GB/T 7714	Wang, Xiangtao,Zhang, Chao,Zhao, Ningning,et al. Physiological Nitrogen Uptake and Utilisation Responses in Two Native Plants from the Qinghai-Tibet Plateau under Different Water and Fertiliser Conditions[J],2024,14(3).
APA	Wang, Xiangtao,Zhang, Chao,Zhao, Ningning,Sun, Xingrong,Hou, Shuai,&Wang, Puchang.(2024).Physiological Nitrogen Uptake and Utilisation Responses in Two Native Plants from the Qinghai-Tibet Plateau under Different Water and Fertiliser Conditions.AGRONOMY-BASEL,14(3).
MLA	Wang, Xiangtao,et al."Physiological Nitrogen Uptake and Utilisation Responses in Two Native Plants from the Qinghai-Tibet Plateau under Different Water and Fertiliser Conditions".AGRONOMY-BASEL 14.3(2024).