Studies on Urease Activity and the Release of Nitrogen and Its Control in Aquaculture Pond Sediments
Taking Dongli district and XiQing district aquaculture ponds in Tianjin as experimental objects, we studied the relationship between hydrolysis organic nitrogen forms in sediment and NH4 +-N contents in overlying water, urease activity and organic nitrogen forms in sediment, urease activity in sediments and NH4 +-N contents in overlying water. Different treatments were taken to control the activity of urease. The results show that Ami. Acid N, Amm. N, Ami.sug. N in sediments and NH4 +-N in overlying water is positive correlation significantly. The relationship between Amm. N, Ami. Acid N and urease activity is positive correlation significantly. Various organic N forms direct effect order on urease activity is amm. N (0.652)>Ami.sug. N (0.152)>HUN (0.126)>Ami. Acid N (-0.021); Urease activity in sediment and NH4 +-N content in overlying water kept the same change as time went by. By adding enzyme inhibitors, zeolite and bacteria, urease activity will be inhibited, among which enzyme inhibitors can reach the best effect.
aquaculture ponds organic nitrogen forms sediment urease activity NH4
TIAN Xiuping CAI Dandan LU Xianzhi HAO Jianchao ZHANG Weijie
Department of Agronomy,Tianjin Agricultural College,Tianjin 300384,China College of Land and Environment,Shenyang Agricultural University,Shenyang 100161,Liaoning,China
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
269-272
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）