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Cassava-maize intercropping systems in southern Nigeria: Radiation use efficiency, soil moisture dynamics, and yields of component crops
Field Crops Research ( IF 5.8 ) Pub Date : 2022-04-30 , DOI: 10.1016/j.fcr.2022.108550
Charles Chigemezu Nwokoro 1, 2 , Christine Kreye 3 , Magdalena Necpalova 4 , Olojede Adeyemi 2 , Matti Barthel 1 , Pieter Pypers 5 , Stefan Hauser 3 , Johan Six 1
Affiliation  

Efficient utilization of incident solar radiation and rainwater conservation in rain-fed smallholder cropping systems require the development and adoption of cropping systems with high resource use efficiency. Due to the popularity of cassava-maize intercropping and the food security and economic importance of both crops in Nigeria, we investigated options to improve interception of photosynthetically active radiation (IPAR), radiation use efficiency (RUE), soil moisture retention, and yields of cassava and maize in cassava-maize intercropping systems in 8 on-farm researcher-managed multi-location trials between 2017 and 2019 in different agro-ecologies of southern Nigeria. Treatments were a combination of (1) maize planting density (low density at 20,000 maize plants ha-1 versus high density at 40,000 maize plants ha-1, intercropped with 12,500 cassava plants ha-1); (2) fertilizer application and management targeting either the maize crop (90 kg N, 20 kg P and 37 kg K ha-1) or the cassava crop (75 kg N, 20 kg P and 90 kg K ha-1), compared with control without fertilizer application. Cassava and maize development parameters were highest in the maize fertilizer regime, resulting in the highest IPAR at high maize density. The combined intercrop biomass yield was highest at high maize density in the maize fertilizer regime. Without fertilizer application, RUE was highest at low maize density. However, the application of the maize fertilizer regime at high maize density resulted in the highest RUE, soil moisture content, and maize grain yield. Cassava storage root yield was higher in the cassava fertilizer regime than in the maize fertilizer regime. We conclude that improved IPAR, RUE, soil moisture retention, and grain yield on nutrient-limited soils of southern Nigeria, or in similar environments, can be achieved by intercropping 40,000 maize plants ha-1 with 12,500 cassava plants ha-1 and managing the system with the maize fertilizer regime. However, for higher cassava storage root yield, the system should be managed with the cassava fertilizer regime.



中文翻译:

尼日利亚南部木薯玉米间作系统:辐射利用效率、土壤水分动态和成分作物的产量

在雨养小农种植系统中有效利用入射太阳辐射和雨水保护需要开发和采用具有高资源利用效率的种植系统。由于木薯-玉米间作的普及以及这两种作物在尼日利亚的粮食安全和经济重要性,我们研究了提高光合有效辐射 (IPAR) 拦截、辐射利用效率 (RUE)、土壤保水性和产量2017 年至 2019 年在尼日利亚南部不同农业生态系统中进行的 8 个农场研究人员管理的多地点试验中木薯和玉米的木薯-玉米间作系统。处理是(1)玉米种植密度的组合(低密度,20,000 玉米植物 ha -1与 40,000 株玉米植株 ha -1的高密度相比,与 12,500 株木薯植株间作 ha -1 );(2) 针对玉米作物(90 kg N、20 kg P 和 37 kg K ha -1)或木薯作物(75 kg N、20 kg P 和 90 kg K ha -1 )的施肥和管理),与不施肥的对照相比。木薯和玉米的发育参数在玉米施肥方案中最高,导致高玉米密度下的 IPAR 最高。在玉米施肥方案中,高玉米密度下的间作组合生物量产量最高。在没有施肥的情况下,低玉米密度时 RUE 最高。然而,在高玉米密度下施用玉米肥料方案导致最高的 RUE、土壤水分含量和玉米籽粒产量。木薯施肥方案的木薯贮藏根产量高于玉米施肥方案。我们得出结论,通过间作 40,000 公顷玉米植物,可以提高尼日利亚南部营养受限土壤或类似环境中的 IPAR、RUE、土壤保水性和谷物产量-1拥有 12,500 株木薯植物 ha -1并使用玉米施肥制度管理系统。然而,为了获得更高的木薯贮藏根系产量,系统应采用木薯施肥方式进行管理。

更新日期:2022-05-01
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