Acta Agrestia Sinica
Effects of Different Phosphorus Levels on Photosynthesis and Root Nodule Nitrogen-fixing Characteristic of Alfalfa
QI Min-xing, LIU Xiao-jing, ZHANG Xiao-lei, LIU Yan-nan
. 2013, (3): 512 -516 .  DOI: 10.11733/j.issn.1007-0435.2013.03.016