Addition of Phosphorus and Nitrogen Support the Invasiveness of Alternanthera Philoxeroides Under Water Stress,Clean - Soil Air Water

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Addition of Phosphorus and Nitrogen Support the Invasiveness of Alternanthera Philoxeroides Under Water Stress
Clean - Soil Air Water ( IF 1.5 ) Pub Date : 2020-07-12 , DOI: 10.1002/clen.202000059
Jianfan Sun ₁ , Qaiser Javed ₁ , Ahmad Azeem ₁ , Muhammad Saif Ullah ₁ , Ghulam Rasool ₂ , Daolin Du _{1,

3}

Affiliation

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 invasive Alternanthera philoxeroides (Mart.), an experiment of water stress is conducted with different nutrient concentrations. Alternanthera philoxeroides plants 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. philoxeroides produces 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 of A. philoxeroides plants. 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 to A. philoxeroides than natural soil.

中文翻译：

磷和氮的添加支持水分胁迫下互花米草的入侵。

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，为了研究侵袭性嗜水线莲的性能和功能性状，在不同营养浓度下进行了水分胁迫实验。菲律宾草植物生长在天然和营养土壤下，并经受三种水平的氮（N）和磷（P）溶液：环境P和N浓度（P-N-），添加P和环境N浓度（P + N-），以及添加高氮浓度（P + N +）的磷以及三种不同的灌溉水位，分别是1）100％灌溉，2）50％灌溉和3）25％亏水灌溉。根据结果，在用P + N-处理100％灌溉后，philoxeroides会在两种土壤中产生更高的生物量，并且叶面积和根长更高。然而，在两种土壤中进行PN处理的25％的灌溉对A. philoxeroides的相对生长速度和根/茎比具有显着的负面影响。植物。在采用P + N-和P + N +处理的土壤中进行50％灌溉时，记录到较高的叶氮值。此外，养分土壤比天然土壤更支持拟南芥。

更新日期：2020-07-12

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