Effects of cadmium and sulfate interaction on physiological and biochemical indexes and yield of Zizania latifolia
The changes of physiological and biochemical indexes in leaves and roots of Zizania latifolia and their yields were studied on single-harvested cultivar Jiangshu and double-harvested cultivar Fenghongzao,which were treated with Cd2+ 100 mg·L-1 and different concentrations of sulfate in soil added by organic fertilizer(OF) and inorganic fertilizer(IF) respectively.Meanwhile,the interaction effects among them were investigated as well.The results are as follows.Injury of Cd2+ stress to Zizania latifolia decrease with increasing of the concentration of SO42-.At 2 mmol·L-1 of SO42-,the yield of Zizania latifolia reached the maximum,and then it descended when the concen-tration of SO42-was more than 2 mmol·L-1,but the yield of Zizania latifolia fertilized with SO42-was still higher than that without it.The contents of soluble protein,the activity of the root system and the yield of Zizania latifolia treated with organic fertilizer were higher than those with inorganic fertilizer.There were differences between cultivars.