Effects of salicylic acid on growth and photosynthetic characteristics of Melilotoides ruthenica in branching stage under different water stress Studies on Properties of Photsynthetic Ecology in Melilotides ruthenica Effects of NaCl stress on substances linked to osmotic adjustment and on photosynthetic physiology of Melilotoides ruthenica in the seedling stage Effects of Different NaCl Concentrations on the Growth and Physiological Indices of Melilotoides ruthenica Seedling Effects of Exogenous Salicylic Acid on Photosynthesis and Forage Production and Quality of Melilotoides ruthenica under Different Water Stress Protoplasts Isolation Conditions of Melilotoides ruthenica Callus