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首页> 外文期刊>Journal of Botany >Evaluation of the Nutrient Status of Some Hydrophytes in the Water Courses of Nile Delta, Egypt
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Evaluation of the Nutrient Status of Some Hydrophytes in the Water Courses of Nile Delta, Egypt

机译：埃及尼罗河三角洲水道中某些水生植物的营养状况评估

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摘要

The nutritive values of three dominant hydrophytes along the water courses in Nile Delta, Egypt (Echinochloa stagnina,Eichhornia crassipes, andCeratophyllum demersum) were evaluated in terms of estimating their phytomass, organic, and inorganic chemical compositions. Shoots were collected seasonally from 25 permanent stands representing the distribution of the three species along 15 canals and 10 drains distributed in 5 localities within the Nile Delta. Living and dead parts and total phytomass were estimated. Their inorganic (Na, K, Ca, Mg, P, Cu, Mn, and Pb) and organic (carbohydrates, total nitrogen, total protein, ether extract, digestible nutrient, digestible energy, metabolized energy, and net energy) contents were estimated. The vegetative phase ofE. stagninaextended during winter, spring, and summer, while it is flowering and fruiting during autumn. On the other hand,E. crassipesandC. demersumattained their maximum flowering during spring and maximum fruiting during summer, while maximum vegetative phase during autumn and winter.E. stagninahad the highest mean annual phytomass, whileC. demersumhad the lowest. The living parts ofC. demersumhad the highest concentrations of Na, Ca, and Mg, while the living parts ofE. crassipeshad the highest of K and N.C. demersumhad the ability to accumulate more concentrations of heavy metals than the other studied species.E. crassipeshad the highest values of total carbohydrate and total proteins, whileE. stagninahad the highest of crude fibers, andC. demersumhad the highest of ether extract and ash contents. The living parts ofE. crassipesandC. demersumwere considered as excellent forages, while the dead parts of all species and the living parts ofE. stagninawere evaluated as poor forage.
机译：评估了埃及尼罗河三角洲沿河水域的三种主要水生植物（Echinochloa stagnina，Eichhornia crassipes和Ceratophyllum demersum）的营养价值，以估算其植物气，有机和无机化学成分。季节性地从25个永久性林分中收集芽，代表这三种物种在尼罗河三角洲5个地区中沿15条运河和10条排水沟的分布。估计了活的和死的部分以及总的植物。估算了它们的无机（Na，K，Ca，Mg，P，Cu，Mn和Pb）和有机（碳水化合物，总氮，总蛋白，乙醚提取物，可消化营养素，可消化能量，代谢能和净能）的含量。 E的营养期。在冬季，春季和夏季，停滞期延长，而秋季则开花并结实。另一方面，E。十字花科去芽菜在春季最大开花，在夏季最大结实，在秋天和冬季最大营养期。停滞的年平均植物气最高，而C。 Demersum的价格最低。 C.的生活部分Demersum的Na，Ca和Mg含量最高，而E的生命部分。 Crassipesha的K和N.C. demersum最高，具有比其他研究物种积累更多浓度的重金属的能力。十字花科植物的总碳水化合物和总蛋白质最高，而E。停滞的粗纤维含量最高，C。脱硫的醚提取物和灰分含量最高。 E的活动部分。十字花科demersum被认为是极好的牧草，而所有物种的死亡部分和E的活体部分都被认为是极好的饲料。断枝被认为是粗饲料。

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