مجلة البحوث والدراسات الإفريقية ودول حوض النيل最新文献

This study was conducted during the 2020 and 2021 seasons on a 30-year-old Ewaise mango cultivar. The trees were grown in a private orchard located at Kom-Omboo city, Aswan Governorate, Egypt. The compost as an organic fertilizer, fortified with EM was used as a partial replacement for the mineral N fertilizer or slow release. The trial was nominated as a complete randomized block design. The collected results clarified that adding the recommended dose of nitrogen (RDN) via 25% as a mineral source and 25 to 50% as an organic one enriched with 50 or 25% of EM or 60 to 80% slow release improved the shoot length and leaf area as well as they’re of total chlorophylls, N, P and K contents compared to use the RDN only as a mineral N fertilizer. The organic fertilizer enriched with 37.5% EM significantly induced these traits more than other used treatments. Moreover, the N fertilization with a combination of mineral and organic N sources with a bio-fertilizer or slow release significantly increased the yield and fruit quality compared to using the RDN only as a mineral source. The preferment in the yield and fruit quality was correlating with increasing the level of the bio-form from 25 to 50% of RDN. It is explicit that such an N fertilization program is very important for mango fruit production. It improves the nutrient status, yield, and fruit quality of mango trees. In addition, it reduces production costs and negative effects on the environment due to the use of chemical fertilizers.

这项研究是在2020年和2021年的季节对一个30岁的Ewaise芒果品种进行的。这些树生长在埃及阿斯旺省Kom-Omboo市的一个私人果园里。堆肥作为有机肥料，添加EM作为部分替代无机氮肥或缓释氮肥。该试验被提名为完全随机区组设计。结果表明，与单纯作为矿物肥的氮肥相比，以25%的矿物肥和25% ~ 50%的有机肥(含50% ~ 25% EM)和60% ~ 80%缓释量的氮肥添加推荐剂量的氮肥，可以提高植株的茎长和叶面积，提高总叶绿素和氮、磷、钾含量。添加37.5% EM的有机肥对这些性状的诱导作用显著高于其他处理。无机氮与有机氮配施生物肥或缓释氮肥比单施无机氮能显著提高产量和果实品质。产量和果实品质的提高与将生物形态水平从RDN的25%提高到50%有关。可见，这样的施氮方案对芒果果实的生产是非常重要的。它改善了芒果树的营养状况、产量和果实品质。此外，它还降低了生产成本和由于使用化肥对环境的负面影响。

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