|
|
|
| The Colonization,Bacteriostasis and Purification Water of Marine Paenibacillus polymyxa Strain L1-9 in a Japanese Shrimp Culture Pond |
| BAO Zeng-hai,MA Gui-zhen,WANG Shu-fang,FU Hong-run,GE Ping-hua,WU Shao-jie |
|
|
|
|
Abstract Marine Paenibacillus polymyxa strain L1-9 was inoculated (without inoculation as control) in Japanese shrimp culture ponds to investigate the colonization ,bacteriostasis and purification water of the marine P .polymyxa strain L1-9 in the Japanese shrimp culture ponds .After that ,the number of L1-9 , V ibrio ,Bacillaceae and heterotrophic bacteria was detected regularly ,and the concentrations of ammonia nitrogen ,nitrate , nitrite , and phosphate were detected . During the culture , the number of V ibrio , Bacillaceae ,and heterotrophic bacteria and the levels of ammonia nitrogen ,nitrate ,and nitrite were found to be significantly lower in the Japanese shrimp culture ponds inoculated with L 1-9 strain than those in the control . However , there was significantly higher concentration of phosphate in the Japanese shrimp culture ponds inoculated with L1-9 strain than that in the control pond , especially the number of Bacillaceae and the ammonia nitrogen level , the Bacillaceae reaching 4 .60 × 102 cfu/mL on the 5 th d , significantly less than that in the control (1 .80 × 103 cfu/mL) on the 7 th d .The concentration of ammonia nitrogen was found to be 60 .2 μg/L ,less than that in the control (76 .7 μg/L) .It is concluded that L1-9 strain has obviously bacteriostasis and purification water effect in aquaculture .
|
|
Received: 25 November 2013
|
|
|
|
|
|
|
