Recent research has shown that the native shrub, Guiera senegalensis J.F. Gmel, interplanted with crops dramatically increases crop yield in the Sahel. However, little is known about the crop development when grown alongside shrubs. The objectives were to determine the effect of shrub presence on crop development under varying fertilizer rates in northern Senegal. Peanut (Arachis hypogaea L.) and pearl millet (Pennisetum glaucum (L.)) response in the presence or absence of shrubs was investigated from 2013 to 2016 under low to adequate rainfall. The experiment had a split-plot factorial design with presence or absence shrubs (+shrub, −shrub) as the main plot (elevated densities of 1200 to 1500 shrubs ha⁻¹) and fertilizer rate (0, 0.5, 1 or 1.5 times the recommended N–P–K rate) as the subplot factors. Major developmental phases, leaf counts and plant height were determined. Shrub presence made crops grow up to four times taller and reach 50% flowering when −shrub plots did not reach 50% in 2013 and 2015 (millet). Changes to crop development, even in low rainfall years, indicate that shrub intercropping buffers against crop water stress. Thus, under drought conditions, shrub-based agroforestry can contribute to reduce fertilizer necessity and to mitigate against climate change.

中文翻译：

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在半干旱地区与 Guiera senegalensis 间作以减轻 A. hypogea 和 P. glaucum 的早期非生物胁迫

最近的研究表明，与作物套种的原生灌木Guiera senegalensis JF Gmel 显着提高了萨赫勒地区的作物产量。然而，当与灌木一起种植时，人们对作物的发展知之甚少。目的是确定塞内加尔北部不同施肥量下灌木的存在对作物发育的影响。研究了 2013 年至 2016 年在低至充足降雨条件下，花生 ( Arachis hypogaea L.) 和珍珠粟 ( Pennisetum glaucum (L.)) 在有或无灌木的情况下的反应。该试验采用裂区因子设计，以存在或不存在灌木（+灌木，-灌木）作为主要区（1200 到 1500 灌木 ha ^{-1的高密度}) 和施肥量（推荐的 N-P-K 施用量的 0、0.5、1 或 1.5 倍）作为子区因子。确定主要发育阶段、叶数和株高。当-灌木地块在 2013 年和 2015 年（小米）未达到 50% 时，灌木的存在使作物长到 4 倍，开花率达到 50%。即使在降雨量少的年份，作物发育的变化也表明灌木间作可以缓冲作物水分胁迫。因此，在干旱条件下，以灌木为基础的农林业有助于减少肥料需求并缓解气候变化。