New Fertilization Approach Improves Okra (Abelmoschus Esculentus L. Moench) Production on Acidic and Degraded Soil in Cameroon

Ngale Tchuengang Uriel prince, Lombeko Obe Tomo Victorine, Suh Christopher Christopher, Temegne Nono Carine, Chimi Nkombo Laure Lysette, Ngonkeu Mangapche Eddy Léonard, Tonfack Libert Brice
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Abstract

Soil acidity, combined with high aluminum toxicity, is one of the major problems limiting agricultural productivity. The objective of this work was to improve growth and yields of okra on acidic and degraded soil in the Center region, Cameroon, using an innovative fertilization approach and lime material. The soil is ferralitic, very acidic, with aluminum toxicity and significant imbalance in the (Ca/Mg/K) ratio of (55/15/30). Seven fertilization treatments were applied: Control without fertilizer; arbuscular mycorrhizal fungi (AMF); AMF+50% poultry manure (AMF+½ PM); mineral fertilizers with cation balance at 100% (MF100 %); AMF+50% mineral fertilizers (AMF+50 % MF); poultry manure at 50%+50 % mineral fertilizers (MF50%+½ PM) and poultry manure (PM). Two varieties of okra were used (Kirikou F1 and Local). The experimental design was a split-plot with two factors. Considering MF, an innovative Ca/Mg/K ratio of 68/23/9 was applied. The results showed that the applied fertilizers had a significant effect on the agronomic parameters of okra with MF50%+½ PM followed by PM and MF100% as the best treatments. An average increase in fresh yield from 111% to 1840% over the control was recorded and the best symbiotic parameters were observed at the AMF treatment associated with the Local variety. This variety responds better to organic matter intake while Kirikou F1 is more favorable to chemical fertilizer addition.
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新施肥方法提高喀麦隆酸性和退化土壤上秋葵产量
土壤酸性和高铝毒性是制约农业生产力的主要问题之一。这项工作的目的是利用创新的施肥方法和石灰材料,在喀麦隆中部地区的酸性和退化土壤上改善秋葵的生长和产量。土壤为铁素体,酸性强,具有铝毒性,(Ca/Mg/K)比值(55/15/30)失衡显著。施7个施肥处理:对照不施肥;丛枝菌根真菌(AMF);AMF+50%禽粪(AMF+½PM);阳离子平衡为100% (mf100%)的矿质肥料;AMF+50%矿质肥料(AMF+ 50% MF);50%+ 50%矿物肥料(MF50%+½PM)和家禽粪便(PM)。选用了两个秋葵品种(基日寇F1和本地秋葵)。实验设计为双因素分裂图。考虑MF, Ca/Mg/K比值为68/23/9。结果表明:不同施肥方式对秋葵的农艺参数影响显著,以MF50%+ 1 / 2pm为最佳处理,其次为PM和MF100%。与对照相比,鲜产量平均增加111% ~ 1840%,与本地品种相关的AMF处理观察到最佳共生参数。该品种对有机质摄取量的响应较好,而基日寇F1对化肥的添加更有利。
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