The effects of different concentrations of photosynthetic bacteria solutions （CK, 0 ml photosynthetic bacteria agent＋4 000 ml nutrient solution; T1, 200 ml pho- tosynthetic bacteria agent＋3 800 ml nutrient solution...The effects of different concentrations of photosynthetic bacteria solutions （CK, 0 ml photosynthetic bacteria agent＋4 000 ml nutrient solution; T1, 200 ml pho- tosynthetic bacteria agent＋3 800 ml nutrient solution; T2, 400 ml photosynthetic bacteria agent＋3 600 ml nutrient solution; T3, 600 ml photosynthetic bacteria agent＋ 3 400 ml nutrient solution; T4, 800 ml photosynthetic bacteria agent＋3 200 ml nutrient solution; and T5, 1 000 ml photosynthetic bacteria agent＋3 000 ml nutrient solu- tion） on the leaf number, fresh mass, root vigor, vitamin C content, soluble sugar content, soluble protein content and nitrate content of hydroponic Lactuca sativa L. were investigated. The results showed that the leaf number was increased by 62.66%, the fresh mass was increased by 139.7%, the root vigor was increased by 132.04%, the vitamin C content was increased by 18.34%, the soluble protein content was increased by 16.60%, the soluble sugar content was increased by 192.37%, and the nitrate content was reduced by 69.44% in the T3 group com- pared with those in the control group. The photosynthetic bacteria solution in the T3 group reduced the content of nitrate and improved the yield and quality of hydroponic L. sativa.展开更多
文摘The effects of different concentrations of photosynthetic bacteria solutions （CK, 0 ml photosynthetic bacteria agent＋4 000 ml nutrient solution; T1, 200 ml pho- tosynthetic bacteria agent＋3 800 ml nutrient solution; T2, 400 ml photosynthetic bacteria agent＋3 600 ml nutrient solution; T3, 600 ml photosynthetic bacteria agent＋ 3 400 ml nutrient solution; T4, 800 ml photosynthetic bacteria agent＋3 200 ml nutrient solution; and T5, 1 000 ml photosynthetic bacteria agent＋3 000 ml nutrient solu- tion） on the leaf number, fresh mass, root vigor, vitamin C content, soluble sugar content, soluble protein content and nitrate content of hydroponic Lactuca sativa L. were investigated. The results showed that the leaf number was increased by 62.66%, the fresh mass was increased by 139.7%, the root vigor was increased by 132.04%, the vitamin C content was increased by 18.34%, the soluble protein content was increased by 16.60%, the soluble sugar content was increased by 192.37%, and the nitrate content was reduced by 69.44% in the T3 group com- pared with those in the control group. The photosynthetic bacteria solution in the T3 group reduced the content of nitrate and improved the yield and quality of hydroponic L. sativa.
