Despite the importance of Allanblackia floribunda as a multipurpose tree grown in south east Nigeria, where small scale farmers retain some trees on their farm land for soil rejuvenation, there is a dearth of research information on intercropping the tree species with grain crops in the region. Field experiments were conducted in 2016 and 2017 cropping seasons in south eastern Nigeria to evaluate the effect of 2–3 years old Allanblackia floribunda alley systems on soil chemical properties and growth and yield of maize and mungbean. The experimental design was a factorial arranged in a randomized complete block design (RCBD). Standard labouratory procedures were used for the soil chemical properties while data on growth and yield were collected for maize and mungbean. All the data collected in the experiments were subjected to analysis of variance using GenStat Release 12.1. Before the commencement of first year double cropping and after two years of cropping, soil samples were collected from the respective plots and analysed for soil chemical properties. The maize experiment had two maize spatial arrangements grown between the tree alleys and in monocrop plots. After the harvest of maize, mungbean was introduced at two plant spacings of 30 × 20 cm and 20 × 20 cm. Soil phosphorus was significantly increased in Allanblackia tree alley than in the control by 55.6%. Soil pH, phosphorus, potassium, magnesium and calcium increased significantly with tree age. Maize under sole cropping intercepted higher photosynthetically active radiation than maize under alley cropping. Double row maize in both cropping systems produced taller plants in 2017 and greater leaf area index in both years than single row maize at 10 and 12 weeks after planting (WAP). Alley cropping with Allanblackia floribunda tree significantly reduced maize seed yield relative to double row maize in sole cropping. The wider spacing of 30 × 20 cm of mungbean significantly reduced average seed yield in alley cropping but increased number of pods per plant in the monocrop in 2017. In contrast, the 20 × 20 cm mungbean spacing in alley cropping produced comparable high seed yield as sole cropping in either of the two spacings.

尽管Allanblackia floribunda作为在尼日利亚东南部种植的多用途树的重要性，在那里小规模的农民在他们的农田上保留了一些树木以进行土壤修复，但缺乏在该地区将树种与谷物作物间种的研究信息。在尼日利亚东南部的2016年和2017年种植季节进行了田间试验，以评估2至3岁的大花All兰的影响胡同系统对土壤化学性质以及玉米和绿豆生长和产量的影响。实验设计是在随机完整模块设计（RCBD）中安排的因子设计。土壤的化学性质采用标准的实验室程序，而玉米和绿豆的生长和产量数据则收集在其中。使用GenStat Release 12.1对实验中收集的所有数据进行方差分析。在第一年翻耕开始之前和两年翻耕之后，从各个样地收集土壤样品并分析土壤化学性质。玉米实验在树巷之间和单作地块中有两个玉米空间布置。玉米收获后，以30×20 cm和20×20 cm的两种植物间距引入绿豆。乌兰树胡同比对照少55.6％。土壤pH，磷，钾，镁和钙随着树龄的增加而显着增加。单株种植的玉米比小巷种植的玉米具有更高的光合活性辐射。种植后10和12周（WAP），两种种植系统中的双排玉米在2017年的植株都更高，两年的叶面积指数都高于单排玉米。胡兰与花Allanblackia种植相对于单行种植的双排玉米，该树显着降低了玉米种子的产量。30×20 cm的较宽间距的绿豆显着降低了胡同作物的平均种子产量，但单作物在2017年增加了单株豆荚的数量。相反，胡同的20×20 cm的绿豆间距可产生与仅在两个间距中的任意一个上裁剪。