The reproductive characteristics of plants are likely affected by climate change e.g., changes in precipitation patterns and nitrogen deposition, but few studies have examined the effects of these ecological agents of selection on the seed yield and germination characteristics of perennial grasses. Here, we conducted a multiple-year pot experiment with Leymus chinensis, a common perennial grass in the eastern region of the Eurasian steppe zone, which was grown under three water treatments with and without nitrogen addition. The seed yield of L. chinensis increased with precipitation and was highest (7.0 g/pot) under 747 mm of precipitation with nitrogen addition (10.5 g/m²). Seed yield was positively correlated with heading number, tiller number, and grain number per spike, and the heading number was a critical factor affecting seed yield. Seed germination percentage and the time to obtain 50% germination were affected by environmental cues experienced by the mother plants.

植物的繁殖特性可能会受到气候变化的影响，例如降水模式和氮沉积的变化，但很少有研究检查这些生态选择因素对多年生草本种子产量和发芽特性的影响。在这里，我们进行了多年的盆栽实验羊草，欧亚草原带东部地区常见的多年生草，在加氮和不加氮的三种水处理下生长。种子产量中华香椿随着沉淀的增加而增加，并且在 747 mm 的沉淀和添加氮 (10.5 g/m ² )下最高 (7.0 g/pot )。种子产量与抽穗数、分蘖数和穗粒数呈正相关，抽穗数是影响种子产量的关键因素。种子发芽百分比和获得 50% 发芽的时间受母株经历的环境线索的影响。