Galal Tarek M, Abu Alhmad Mona F, Al-Yasi Hatim M
Department of Biology, College of Sciences, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia.
Botany and Microbiology Department, Faculty of Science, Helwan University, Cairo 11790, Egypt.
Saudi J Biol Sci. 2021 Apr;28(4):2438-2446. doi: 10.1016/j.sjbs.2021.01.042. Epub 2021 Feb 1.
The current work investigates the capacity of the water primrose () to sequester inorganic and organic nutrients in its biomass to restore eutrophic wetlands, besides its nutritive quality as fodder for animals. The nutrient elements and nutritive value of the water primrose were assessed seasonally in polluted and unpolluted watercourses. The water primrose plants' highest biomass was attained during summer; then, it was significantly reduced till it reached its lowest value during winter. In the polluted canal, the plant root and shoot accumulated higher contents of all nutrient elements (except Na and Mg) rather than in the unpolluted Nile. They accumulated most investigated nutrients in the growing season during summer. The shoots accumulated higher contents of N, P, Ca, and Mg than the root, which accumulated higher concentrations of Na and K. Therefore, summer season is the ideal time to harvest water primrose for removing the maximum nutrients for restoring eutrophic watercourses. The aboveground tissues had the highest values of ether extract (EE) during spring and the highest crude fibers (CF) and total proteins (TP) during summer. In contrast, the belowground tissues had the lowest EE, CF, and TP during winter. In spring, autumn, and winter seasons, the protein content in the grazeable parts (shoots) of the water primrose was within the range, while in summer, it was higher than the minimum requirement for the maintenance of animals. There was a decrease in crude fibers and total proteins, while an increase in soluble carbohydrates content in the below- and above-ground tissues of water primrose under pollution stress. The total protein, lipids, and crude fibers of the aboveground parts of water primrose support this plant as a rough forage.
目前的研究工作探讨了粉绿狐尾藻在恢复富营养化湿地方面，除了作为动物饲料的营养价值外，其生物量中螯合无机和有机养分的能力。在受污染和未受污染的水道中，对粉绿狐尾藻的营养元素和营养价值进行了季节性评估。粉绿狐尾藻植株的生物量在夏季达到最高；然后，显著降低，直到冬季达到最低值。在受污染的运河中，植物的根和地上部分积累了比未受污染的尼罗河更高的所有营养元素（除钠和镁外）含量。它们在夏季生长季节积累了大多数被研究的养分。地上部分积累的氮、磷、钙和镁含量高于根，而根积累的钠和钾浓度更高。因此，夏季是收获粉绿狐尾藻以去除最大量养分来恢复富营养化水道的理想时间。地上组织在春季的乙醚提取物（EE）值最高，在夏季的粗纤维（CF）和总蛋白（TP）值最高。相比之下，地下组织在冬季的EE、CF和TP值最低。在春季、秋季和冬季，粉绿狐尾藻可食用部分（地上部分）的蛋白质含量在范围内，而在夏季，高于维持动物所需的最低要求。在污染胁迫下，粉绿狐尾藻地下和地上组织中的粗纤维和总蛋白含量降低，而可溶性碳水化合物含量增加。粉绿狐尾藻地上部分的总蛋白、脂质和粗纤维表明这种植物可作为粗饲料。
