Effects of nitrogen and silicon application on leaf nitrogen content and net photosynthetic rate of Elymus nutans in alpine meadow
Xiao-Lin SI, Wen-Yin WANG, Xiao-Gang GAO, Dang-Hui XU
Chin J Plant Ecol . 2016, (12): 1238 -1244 .  DOI: 10.17521/cjpe.2015.0398