ArticleFrontiers in plant science2026
Differential and interactive effects of growing and non-growing season precipitation addition on plant and soil stoichiometry in semi-arid steppe.
Article in Frontiers in plant science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: Ecological stoichiometry, which examines the balance of energy and nutrients in ecological interactions, is notably sensitive to variations in precipitation. Seasonal precipitation regimes and their interactions may regulate nutrient mineralization, nutrient mobility, and plant nutrient uptake differently across seasons, thereby altering plant and soil stoichiometric characteristics. However, most studies have emphasized alterations in rainfall during the growing season, often neglecting the role of precipitation during the non-growing season and potential interactions between seasonal precipitation regimes. Methods: Using a factorial arrangement of two factors of precipitation additions, we conducted a short-term, two-year field experiment to test the differential and interactive effects of non-growing and growing season precipitation additions on plant and soil stoichiometry in a semi-arid steppe. Results: The results indicated that (1) growing season precipitation addition primarily altered N and P dynamics in both plants and soils, but its effects on stoichiometric balance were strongly dependent on prior moisture conditions; (2) non-growing season precipitation addition exerted legacy effects that altered the magnitude and direction of plant and soil nutrient balances in the subsequent growing season; and (3) interaction between growing and non-growing season precipitation addition fundamentally altered plant and soil stoichiometry. At the community level, growing-season precipitation addition caused a marginal decrease in plant nitrogen concentration under non-growing-season precipitation addition (-1.7 g kg
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