Nitrogen-phosphorus stoichiometry shapes seedling growth and yield performance of perennial cool-season forage grasses in saline-alkali soil.

ABSTRACT: Grass production faces increasing challenges due to excessive fertilization, which contributes to greenhouse gas emissions and poor soil quality, especially in saline-alkali regions, threatening long-term sustainability. Most previous studies have focused on short-term effects of nitrogen (N) or phosphorus (P) applied individually, with limited understanding of their interactive and long-term impacts. This study investigated the combined effects of N and P fertilization on the seed germination and yield production of perennial cool-season forage grasses under saline-alkali soil conditions. Over three consecutive years, large-scale orthogonal field experiments were conducted with 18 N levels (0-480 kg N ha⁻¹) and 16 P levels (0-240 kg P₂O₅ ha⁻¹) across six grass species to determine the opt

SUBMITTER: Xu N 

PROVIDER: S-EPMC12548116 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature