Efficiency test on organic and inorganic fertilizes with cyanobacteria (Microcystis) in several crops

In the present paper, the authors studied the efficiency of fertilizers made from bloom-forming cyanobacteria in field. Compared with efficiency of general compound fertilizes on the market, that of the organic and inorganic fertilizes from several Cyanobacteria ( Microcystis) were higher to the output of tobacco, celery leek and carnation. Dose of 900kg/hm(2) is best in tobacco experiments, and tobacco's yield, production value and fine tobacco ratio increased 7.28%, 5.04% and 19.81%, respectively; Treated with three doses of 600kg/hm(2), 900kg/hm(2) and 1200kg/hm(2), Chinese chives' output is higher than the control's, increased 9.5%, 17.1% and 16.3%, respectively; leek' s high, leaf broad and yield increased 12.21% and 13.32% respectively, with treatment of 900kg/hm(2), 1200 kg/hm(2) of Cyanobacterial fertilizer; Output of Carnation arrived to 4865 bunch/100m(2), increased 11.6% compared with the control. No cyanobacterial toxin was determined in leek and soil, suggesting that the safety of cyanobacterial fertilizer. It not only solves the difficult problem on processing the great Cyanobacterial biomass in some eutrophic lakes, but also improves environment, and increases benefits of society and economy.