摘要
采用室内模拟试验研究了沉积物扰动下上覆水中可被生物利用颗粒态磷(BAPP)的变化规律,并分析了BAPP与悬浮物中内源磷间的内在联系.试验用沉积物分别于春季和夏季采自太湖梅梁湾和月亮湾.结果表明,沉积物扰动降低了上覆水中生物有效磷(BAP)含量,降至初始状态的40%左右.BAPP也明显降低,其占BAP的百分比稳定在50%左右,梅梁湾春季除外.扰动状态下颗粒态磷(PP)生物有效性显著降低,第12h时,BAPP占PP的百分比仅为10%左右;这与悬浮物中NH4Cl-P和Fe/Al-P的降低明显相关,但其与(AAP+NH4Cl-P)占Tot-P的百分比相关性更好[r=0.565(n=48)].这暗示,沉积物扰动可能延缓了水体富营养化发展进程.
The variation of BAPP under sediment disturbance conditions in the overlying water was investigated in the lab, and the relationship between BAPP and internal phosphorus forms on suspended solids was analyzed. The sediments were taken from Meiliang Bay and Moon Bay in Tai Lake during spring and summer. The results show that the concentrations of BAP decreased due to sediment disturbance and were reduced to about 40% of the initial state. At the same time, the concentrations of BAPP were reduced obviously, and the percentages of BAPP to BAP remained at 50% , except of Meiliang Bay in spring. Sediment disturbance improved the reduction of bioavailability of PP. The percentage of BAPP to PP was reduced to about 10% at 12 h, which was attributed to the decrease of NH4 Cl-P and Fe/Al-P on the suspended solids. The relationship between the bioavailability of PP and the percentage of （ AAP ＋ NH4 C1-P） to Tot-P [ r = 0. 565 （ n = 48 ） ] was better. This study implied that sediment disturbance may hurdle the development of water eutrophication.
出处
《环境科学学报》
CAS
CSCD
北大核心
2013年第10期2766-2773,共8页
Acta Scientiae Circumstantiae
基金
国家自然科学基金项目(No.51178523
50938005
51278284
50908154)~~
关键词
扰动
可被生物利用颗粒态磷
磷形态
沉积物
太湖
disturbance
bioavailable particulate phosphorus
phosphorus forms
sediment
Tai Lake
