Tropical soils are mostly poor in phosphorus and sometimes in nitrogen and potassium. Arbuscular mycorrhizae increase the efficiency of chemical fertilizers applied to crops, and this work is part of this framework. NPK (nitrogen-phosphorus-potassium) was applied at 100 kg per ha and 200 kg per ha alone or in combination with inoculum from sorghum or leek in soil (pH 4.28). The trial was conducted on a 3 × 3 split-plot design with 3 replicates. Plant height, number of leaves and chlorophyll level in the leaves were evaluated. The frequency of root colonization by mycorrhizal fungi was also studied. The number of pods per plant, the number of seeds per pod and the yield were also evaluated. The results showed that vegetative parameters increased with the addition of fertilizers while production parameters varied little with fertilizers but significantly, when these fertilizers were associated with mycorrhizal inoculum. Treatments with 200 kg NPK combined with sorghum inoculum produced 512 kg of beans per ha, while 200 kg NPK alone produced 278 kg of beans per ha.

热带土壤中的磷含量极低，有时还缺乏氮和钾。丛枝菌根提高了作物化学肥料的利用率，这项工作是该框架的一部分。NPK（氮-磷-钾）的施用量为每公顷100 kg，每公顷200 kg，或与土壤（pH 4.28）中高粱或韭菜的接种物组合使用。该试验是在3×3分割图设计中进行的，重复3次。评价株高，叶片数和叶片中的叶绿素水平。还研究了菌根真菌在根部定植的频率。还评估了每种植物的豆荚数，每个豆荚的种子数和产量。结果表明，随着肥料的添加，营养参数增加，而肥料的生产参数变化不大，但当这些肥料与菌根接种物相关时，营养参数却显着增加。用200公斤NPK和高粱接种物组合处理，每公顷可生产512公斤豆，而仅200公斤NPK则可生产278公斤豆。