论文部分内容阅读
内蒙古乌梁素海是以大型水生植物过量生长为主要特征的富营养化湖泊,共沉水植物共4科4属8种,生产力(干重)为0.75~0.96kg/m2,生产量(干重)约为9×104t/a.各种沉水植物的粗蛋白含量均高于15%,营养指标符合家畜家禽的饲养标准,是具有十分可观开发价值的水生植物资源。采用gGSCC—1.4(A)型水草收割机大规模收获沉水植物每年可为乌梁素海湖周牧区和农区提供5.4×104t优质草粉饲料。此外,每收获1t(干重)沉水植物即可从富营养化水体中转移出24kg氮和2kg磷,这对减少乌梁素海内源性营养物负荷及生物掩埋过程具有明显的效果,可为乌梁素海的治理与保护提供一项积极的、可行的对策。
Inner Mongolia Wuliangsuhai is an eutrophic lake with the overgrowth of large-scale aquatic plants as its main features. The total submerged macrophytes are 4 species, 4 genera and 8 species, and the productivity (dry weight) is 0.75 ~ 0.96kg / m2. The production (dry weight) About 9 × 104t / a. The crude protein content of various submerged macrophytes is higher than 15%. The nutrition index accords with the standard of domestic poultry raising, which is a hydrophyte resource with considerable development value. Large-scale harvesting of submerged macrophytes with gGSCC-1.4 (A) type water-harvest harvester can provide 5.4 × 104t of high quality grass meal feed for the pastoral areas and agricultural areas of Wuliangsuhai Lake every year. In addition, 24 kg of nitrogen and 2 kg of phosphorus were removed from the eutrophic water per 1t (dry weight) submerged macrophytes, which had a significant effect on reducing endogenous nutrient loading and bio-burial in the Wuliangsu Sea. Provide a positive and feasible countermeasure for the governance and protection of Wuliangsuhai.