Effects of Water and Nitrogen Addition on the Seed Yield and Germination Characteristics of the Perennial Grass Leymus chinensis (Trin.) Tzvel

Frontiers in Environmental Science

Wen-Wen Qi¹  Shao-Yang Li¹  Hong-Yuan Ma¹  Meng-Yao Ma¹  Jiang-Bao Xia²  Dan-Dan Zhao²  Lei Wang³ 

[1] Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, China;Shandong Key Laboratory of Eco-Environmental Science for Yellow River Delta, Binzhou University, Binzhou, China;State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China;

关键词: Leymus chinensis;    precipitation;    nitrogen deposition;    sexual reproduction;    seed yield;    seed germination;   

DOI  :  10.3389/fenvs.2021.704097

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown