摘要
1987年2月—1988年3月在山东平度县大泽山水库进行了本项研究。结果表明,总磷及颗粒磷夏季显著高于冬季,总溶解磷、溶解有机磷及溶解无机磷则是冬季高于夏季;总磷中几乎终年都以颗粒磷为主,总溶解磷中则基本上全年都以溶解有机磷为主;溶解无机磷的季节变化最剧烈,颗粒磷次之,全年中溶解有机磷最稳定,早春及冬季则以总磷最稳定;影响该水库磷变化的主要因素是进水、人工施肥,以及为风力和水深所影响的沉积物的沉浮。为此作者建议,冬季和早春的调查应选总磷为指标,全年调查应选溶解有机磷;浅水水域施磷肥的适宜时机为生长季节的高水位期,枯水期一般不必施磷肥。
This work was conducted in Feb. 1987-Mar. 1988 in Dazeshan Reservoir, Pingdu County, Shandong Province. The reservoir was 1 125 mu (ca. 73 ha) in area and 2.8 m in average depth. Stratification of concentrations of total phosphrus ([TP] ) and its components in the reservoir was not conspicuous throughout the ice-free season. [TP] varied from 0.030 to 0.165 mg/L and averaged 0.064 mg/L throughout the year. The percentages of paniculate phosphorus (PP),. totol dissolved phosphorus (TOP), dissolved organic phosphorus (DOP) and dissolved inorganic phosphorus (DIP), were 34.17-91.61%, 71.66% in average; 8.31-65.83%, 28.34% in average; 7.45-48.09%, 18.75% in average; and 0-18.64, 9.77% in average respectively.[TP] and [PP] were higher in summer but lower in winter, while [TOP], [DOP], and [DIP] were just the opposite. [PP] . mostly abiogenic, constituted a dominant part of [TP] . Among the components, [DOP] was most stable throughout the year, [TP] was stable during the winter and the early spring; the temporal variation of [DIP] was the largest, and that of [PP] came next.Principal factors affecting the variation of phosphorus in the reservoir were the inflow of water, artificial fertilization, and the suspension of the sediments which, in turn, was governed ,by wind force, water depth and inflow of water. The effects of wind force in combination with water depth was most conspicuous.On the basis of the results, the authors suggested that: 1) the proper time for P-level observation for assessment of the productivity of water bodies would be winter or early spring, in case one could not take a year-round sampling; and TP should be chosen as the index of P-level in winter or early spring, and DOP for year-round observations; 2) the proper time for phosphorus fertilization to shallow inland waters would be the high water-level periods in the growing season.
出处
《海洋与湖沼》
CAS
CSCD
北大核心
1991年第2期104-110,共7页
Oceanologia Et Limnologia Sinica
基金
国家水利部资助项目
