烟台海岸带地区狗尾草内稳性缓解P限制

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Abstract In order to explore the nutrient utilization and environmental adaptation strategies of Setaria viridis (L.) Beauv. on different coastal gradients, this paper analyzed the nutrient content of Setaria viridis leaves and soil under the sandy coastal shelter forest in Yantai, and discussed the relationship between leaf stoichiometry characteristics and endostabilizing characteristics and soil. The results showed that there was a certain response in the leaf and soil nutrient content and stoichiometric characteristics of Setaria viridis on different coastal gradients. The soil P content in the study area was extremely low, and more specifically the leaves of Setaria viridis grass P-N:P(leaf nitrogen-phosphorus ratio)>16. The growth and development of Setaria viridis were more limited by the P element. Moreover, P-C (leaf organic carbon), P-P (leaf total phosphorus), P-C:N (leaf carbon-nitrogen ratio), P-C:P (leaf carbon-phosphorus ratio) and P-N:P(the leaf nitrogen-phosphorus ratio) were all in absolute steady state. 1/H(P-N) (the internal stability coefficient of leaf total nitrogen) was 0.26, which belonged to the weak steady state type, but N:P was more stable than N and P elements. It is concluded that Setaria viridis regulate its nutrients in a certain proportion during the growth process. In the study area, Setaria viridis was mainly limited by the P element, but the overall internal stability was high indicating that Setaria viridis was highly adaptable in the coastal environment. It could maintain the dynamic balance of stoichiometry in vivo in a changeable environment, and alleviate the influence of P restriction in coastal areas with a low growing rate.

Key words： Setaria viridis homeostasis nutrient restriction stoichiometry characteristics sandy soil

Received: 03 April 2023

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X173

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	ZHONG Xiao-ying
	REN Yi-wei
	YI Hua-peng
	ZHU He
	GAO Meng

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ZHONG Xiao-ying,REN Yi-wei,YI Hua-peng等. Homeostasis of Setaria viridis (L.) Beauv. in Yantai coastal zone alleviated P limitation[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(10): 5498-5507.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I10/5498

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