Nutritional response of sugar maple seedlings to water stress under highly nitrogen-enriched soil conditions

IF 2.6 3区农林科学 Q1 AGRONOMY

Journal of Plant Nutrition and Soil Science Pub Date : 2023-12-06 DOI:10.1002/jpln.202300034

Eva Masson, Claudele Ghotsa Mekontchou, Alain Cogliastro, Daniel Houle, David Rivest

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引用次数: 0

Abstract

Background

Temperate forests of eastern North America will be increasingly affected by chronic atmospheric nitrogen deposition, elevated temperatures, and drought events that will expose trees to moisture-stressed conditions in non-nitrogen-limited soils. Yet, little is known regarding the response of sugar maple-dominated forests to moisture stress under non-nitrogen-limiting conditions.

Aims

The objective of this greenhouse study was to analyze the effects of moisture stress on the nutrition and growth of sugar maple seedlings growing on base-poor forest soils that were strongly fertilized with nitrogen.

Methods

One-year-old sugar maple seedlings were grown with and without water stress on soils from a sugar maple stand that had been fertilized for 15 years at a rate of 85 kg N ha⁻¹ y⁻¹.

Results

Decreased moisture availability decreased total, leaf, root and stem biomass, and root/stem ratio. Leaf concentrations of N, P, Ca, and Mg and root concentrations of K, Ca, and Mg were 6% to 23% significantly lower under stressed versus unstressed conditions despite no changes in N, P, K, and Mg concentrations in the soil. Only soil Ca concentration was negatively affected by the moisture stress treatment. Soil and leaf δ¹⁵N and the k-factor (i.e., isotopic discrimination effect of ¹⁵N-labeled sources of N between roots and soil) that was used to assess N-use efficiency of sugar maple seedlings did not differ between water stress treatments.

Conclusions

Our results indicate that decreasing root biomass of sugar maple seedlings under moisture stress in non-nitrogen-limiting situations would decrease their ability to take up nutrients that are necessary for growth and induce lower concentrations in leaves and roots. Expected severe drought events could substantially limit nutrient uptake capacity of sugar maple seedlings on sites that are subject to chronic atmospheric N-deposition, which would contribute to dieback in sugar maple stands.

Abstract Image

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高氮富集土壤条件下糖槭树苗对水分胁迫的营养响应

北美东部的温带森林将越来越多地受到大气中长期氮沉积、温度升高和干旱事件的影响，这将使树木暴露在非氮限制土壤中的水分胁迫条件下。然而，人们对糖槭为主的森林在非氮限制条件下对水分胁迫的反应知之甚少。

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来源期刊

Journal of Plant Nutrition and Soil Science 农林科学-农艺学

CiteScore

4.70

自引率

8.00%

发文量

审稿时长

8-16 weeks

期刊介绍： Established in 1922, the Journal of Plant Nutrition and Soil Science (JPNSS) is an international peer-reviewed journal devoted to cover the entire spectrum of plant nutrition and soil science from different scale units, e.g. agroecosystem to natural systems. With its wide scope and focus on soil-plant interactions, JPNSS is one of the leading journals on this topic. Articles in JPNSS include reviews, high-standard original papers, and short communications and represent challenging research of international significance. The Journal of Plant Nutrition and Soil Science is one of the world’s oldest journals. You can trust in a peer-reviewed journal that has been established in the plant and soil science community for almost 100 years. Journal of Plant Nutrition and Soil Science (ISSN 1436-8730) is published in six volumes per year, by the German Societies of Plant Nutrition (DGP) and Soil Science (DBG). Furthermore, the Journal of Plant Nutrition and Soil Science (JPNSS) is a Cooperating Journal of the International Union of Soil Science (IUSS). The journal is produced by Wiley-VCH. Topical Divisions of the Journal of Plant Nutrition and Soil Science that are receiving increasing attention are: JPNSS – Topical Divisions Special timely focus in interdisciplinarity: - sustainability & critical zone science. Soil-Plant Interactions: - rhizosphere science & soil ecology - pollutant cycling & plant-soil protection - land use & climate change. Soil Science: - soil chemistry & soil physics - soil biology & biogeochemistry - soil genesis & mineralogy. Plant Nutrition: - plant nutritional physiology - nutrient dynamics & soil fertility - ecophysiological aspects of plant nutrition.