Addition of Phosphorus and Nitrogen Support the Invasiveness of Alternanthera Philoxeroides Under Water Stress
Addition of Phosphorus and Nitrogen Support the Invasiveness of Alternanthera Philoxeroides Under Water Stress
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添加磷和氮支持水胁迫下空心莲子草的侵袭
DOI：
10.1002/clen.202000059
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发表时间：
2020-07
期刊：
影响因子：
--
通讯作者：
Daolin Du
中科院分区：
文献类型：
--
作者：
Jianfan Sun;Qaiser Javed;Ahmad Azeem;Muhammad Saif Ullah;Ghulam Rasool;Daolin Du
植物功能性状与环境变化的协调有助于理解植物入侵和适应的机制。因此，为了研究入侵性空心莲子草（Mart.）的性能和功能性状，在不同养分浓度下进行了水分胁迫实验。空心莲子草植物在天然和营养土壤下生长，并接受三种水平的氮（N）和磷（P）溶液：环境P和N浓度（P−N−）、环境N浓度（P+N−）的P添加和高N浓度的P添加(P+N+) 与三种不同灌溉水位组合：1) 100% 灌溉，2) 50% 灌溉，3) 25% 赤字灌溉。根据结果，A.在 P+N− 处理的 100% 灌溉下，空心莲子在两种土壤中产生显着更高的生物量，并表现出更高的叶面积和根长度值。然而，两种土壤中 25% 的 P−N− 灌溉对 A 的相对生长速率和根冠比产生显着的负面影响。空心莲属植物。在 P+N− 和 P+N+ 处理的土壤中，在 50% 灌溉下，记录了较高的叶氮值。此外，营养土对A的支持力更强。空心莲比天然土壤。
Coordination of plant functional traits with changes in the environment is helpful to understand the mechanisms underlying both invasiveness and adaptation of plants. Thus, to investigate the performance and functional traits in invasiveAlternanthera philoxeroides(Mart.), an experiment of water stress is conducted with different nutrient concentrations.Alternanthera philoxeroidesplants are grown under natural and nutrient soils and subjected to three levels of nitrogen (N) and phosphorus (P) solution: ambient P and N concentration (P−N−), P addition with an ambient N concentration (P+N−), and P addition with high N concentration (P+N+) in combination with three different irrigation water levels as 1) 100% irrigation, 2) 50% irrigation, and 3) 25% deficit irrigation. Based on results,A. philoxeroidesproduces significantly higher biomass in both soils under 100% irrigation with P+N− treatment and exhibits higher values of leaf area and root length. However, 25% irrigation with P−N− treatment in both soils exerts a significant negative effect on relative growth rate and root/shoot ratio ofA. philoxeroidesplants. Under 50% irrigation in soils with both P+N− and P+N+ treatments, high values of leaf nitrogen are recorded. Moreover, nutrient soil is more supportive toA. philoxeroidesthan natural soil.
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