Effect of biogas slurry of Eichhornia crassipes on the seedling quality of Chinese cabbage

An experiment was conducted to determine the effect of biogas slurry of Eichhornia crassipes on the seedling quality of Chinese cabbage by measuring the biomass, the root activity, the protein, the nitrite, the soluble sugar content and vitamin C in this study. This study showed that the measured parameters (including the root activity, biomass, protein, soluble sugar and vitamin C) of Chinese cabbage significantly increased when the Chinese cabbage seeds were soaked by biogas slurry. The fresh weight, dry weight and root activity of Chinese cabbage increased with the increase of biogas slurry concentration, and were higher than those treated by purified biogas slurry, which were higher that of control. The protein, soluble sugar and vitamin C Chinese cabbage was the best when treatment consisted of distilled water and biogas slurry with ratio of 1∶2. The nitrite content of Chinese cabbage significant decreased when compared to the control in the medium ratio and high ratio treatments, whereas it was no significant difference in the low ratio and full biogas slurry treatments. This study suggested that the quality of Chinese cabbage could be improved when the seeds were soaked by the right concentration biogas slurry of Water hyacinth.