Digitaria sanguinalis is an annual worst weed in the grass family that occurs in all parts of China.It mainly does harm to dryland crops and direct-sowing rice
In order to further determine the nitrogen demand of plants in alpine grassland ecosystem,different nitrogen levels(0,1,2,4,8,16,24,32 g/m^2)were designed throu
In view of Melilotus officinalis having high protein content and significant effect on improving saline alkali soil,a comprehensive experiment about improving saline alkali soil by planting M.officina