Wang Yi-Ru, Wang Sheng-Rui, Jiao Li-Xin, Zhang Yun, Gao Qiu-Sheng, Yang Feng
School of Environment Science and Engineer, Kunming University of Science and Technology, Kunming 650500, China.
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
Huan Jing Ke Xue. 2017 Jun 8;38(6):2336-2344. doi: 10.13227/j.hjkx.201611098.
The vertical variation in the contents of nitrogen and phosphorus with different forms in pore water and overlying water was continuously measured for twelve months in Dianchi Caohai Lake. The research revealed the difference of N or P concentration between pore water and overlying water and the contribution of nitrogen and phosphorus forms. It is significant to understand the formation of N and P and the ratio of N/P in pore water in the fields of lake eutrophication and the control of internal nutrient-loading. The results demonstrated that:①Sediment pore water (NH-N) was significantly higher than that in overlying water. But for NO-N, it obeyed the opposite rule. From Feb. to Nov., (SRP) was higher than that in overlying water, while the opposite rule was found in Dec. and Jan.. ②In sediment pore water, (NH-N) or (SRP) presented the maximum contribution ratio of DTN (78%) or DTP (61%), respectively. While, in overlying water, the maximum contribution ratio was DON(44%) or DOP(81%), respectively. Compared to those in spring and winter, the contribution of (NH-N) and (SRP) increased distinctly and the contribution of (NO-N), (DON) and (DOP) dropped obviously in summer and autumn. ③The temporal variations for the ratios of DTN/DTP, (NH-N+NO-N)/SRP and DON/DOP in pore water were all in the following sequence:spring> winter> summer> autumn. In overlying water, the N/P ratio in spring was relatively higher than that in the other three seasons.
在滇池草海连续十二个月对孔隙水和上覆水中不同形态氮、磷含量的垂直变化进行了测定。该研究揭示了孔隙水和上覆水中氮或磷浓度的差异以及氮、磷形态的贡献。了解孔隙水中氮、磷的形成及氮磷比在湖泊富营养化及内部营养负荷控制领域具有重要意义。结果表明：①沉积物孔隙水（NH-N）显著高于上覆水。但对于NO-N，情况则相反。2月至11月，（SRP）高于上覆水，而12月和1月则相反。②在沉积物孔隙水中，（NH-N）或（SRP）分别呈现出DTN（78%）或DTP（61%）的最大贡献率。而在上覆水中，最大贡献率分别为DON（44%）或DOP（81%）。与春季和冬季相比，夏季和秋季（NH-N）和（SRP）的贡献率明显增加，（NO-N）、（DON）和（DOP）的贡献率明显下降。③孔隙水中DTN/DTP、（NH-N+NO-N）/SRP和DON/DOP比值的时间变化均为：春季＞冬季＞夏季＞秋季。在上覆水中，春季的氮磷比相对高于其他三个季节。
