Soil fertility management effects on maize productivity and grain zinc content in smallholder farming systems of Zimbabwe

Manzeke, Grace M.; Mapfumo, Paul; Mtambanengwe, Florence; Chikowo, Régis; Tendayi, Takesure; Çakmak, İsmail

doi:10.1007/s11104-012-1332-2

Cited by 61 publications

(49 citation statements)

References 38 publications

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“…Kanwal et al (2010) in a study in Pakistan (soil pH= 8.0) showed that with an initial value of 0.7 mg Zn-DTPA kg -1 the maize responded to Zn application even when the doses were between 6-18 kg ZnSO 4 ha -1 . Similarly, a number of studies have shown that if there is a good N-P-K status on soils the application of Zn would enhance the maize grain yield in other arid and semiarid regions (Manzeke et al, 2012;Mena et al, 2013) for crop production through improving soil fertility, soil physical properties and soil biodiversity (Lal, 2009) and; iv) in contrast, Mn and Cu were negatively correlated to maize yield, which suggest that excessive amounts of these micronutrients may generate toxicity in maize growing. under-fertilisation amount ranged between 15and 40 kg P 2 O 5 ha -1 .…”

Section: Relationship Between Maize Yield and Nutrient Status On Soilsmentioning

confidence: 99%

Evaluation of soil fertility and fertilisation practices for irrigated maize (Zea mays L.) under Mediterranean conditions in Central Chile

Nájera

Tapia

Baginsky

et al. 2015

J. Soil Sci. Plant Nutr.

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The main aim of this study was to carry out an evaluation of soil fertility and fertilisation practices for irrigated maize (Zea mays L.) under Mediterranean conditions in central Chile. Soil samples were collected from 31 maize fields for macro-and micronutrient analysis; additionally a crop management survey was carried out in each field. These data were used to identify the range of critical soil-test concentrations of nutrients and the relationships among these soil fertility parameters; to assess the relationship between maize yields and nutrient status of soils; to evaluate the current fertiliser practices of farmers comparing them with nitrogen (N), phosphorus (P) and potassium (K) fertiliser model calculations; and to analyse whether The results showed that there was a dominance of neutral-alkaline soils with low organic matter and N levels, and high P, cations and micronutrient levels. Regression analysis explained at least 59% of the variation in maize yields, when soil pH and available zinc (Zn) content were identified as the most important variables controlling maize yield. Results suggest that in neutral-alkaline soils cultivated with maize and high inputs of N-P-K, there may be a maize yield response to Zn applications. It was found that most farmers over-fertilised with N (from 60 to 360 kg N ha -1 ) and P (from10 to 120 kg P 2 O 5 ha -1 ), converting maize fields in an important non-point source of pollution of water bodies in central Chile.

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Section: Relationship Between Maize Yield and Nutrient Status On Soilsmentioning

confidence: 99%

Evaluation of soil fertility and fertilisation practices for irrigated maize (Zea mays L.) under Mediterranean conditions in Central Chile

Nájera

Tapia

Baginsky

et al. 2015

J. Soil Sci. Plant Nutr.

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“…In Southern Africa, agronomic biofortification with soil Zn fertilizer can increase grain Zn concentration in maize (Manzeke, 2013; Manzeke et al., 2014) and cowpea ( Vigna unguiculata L.; Manzeke et al., 2017). These crops are typically grown in smallholder communities in Zimbabwe on soils of low Zn status, and may contribute to addressing Zn deficiency within the region, if Zn fertilizers are added (Manzeke et al., 2012, 2014, 2019; Moloto, Moremi, Soundy, & Maseko, 2018). While the Zimbabwe Government recently launched the National Food Fortification Program, which regulates mandatory fortification of staple foods with essential micronutrients (WHO, 2015), fortified foods remain unaffordable to the marginalized rural communities.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen effect on zinc biofortification of maize and cowpea in Zimbabwean smallholder farms

et al. 2020

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Agronomic biofortification of crops with zinc (Zn) can be enhanced under increased nitrogen (N) supply. Here, the effects of N fertilizer on grain Zn concentration of maize (Zea mays L.) and cowpea (Vigna unguiculata L.) were determined at two contrasting sites in Zimbabwe over two seasons. All treatments received soil and foliar zinc-sulphate fertilizer. Seven N treatments, with three N rates (0, 45, and 90 kg ha −1 for maize; 0, 15, and 30 kg ha −1 for cowpea), two N forms (mineral and organic), and combinations thereof were used for each crop in a randomized complete block design (n = 4). Maize grain Zn concentrations increased from 27.2 to 39.3 mg kg −1 across sites. At 45 kg N ha −1 , mineral N fertilizer increased maize grain Zn concentration more than organic N from cattle manure or a combination of mineral and organic N fertilizers. At 90 kg N ha −1 , the three N fertilizer application strategies had similar effects on maize grain Zn concentration. Co-application of N and Zn fertilizer was more effective at increasing Zn concentration in maize grain than Zn fertilizer alone. Increases in cowpea grain Zn concentration were less consistent, although grain Zn concentration increased from 39.8 to 52.7 mg kg −1 under optimal co-applications of N and Zn. Future cost/benefit analyses of agronomic biofortification need to include information on benefits of agro-fortified grain, complex farmer management decisions (including cost and access to both N and Zn fertilizers), as well as understanding of the spatial and site-specific variation in fertilizer responses.Abbreviations: CRM, certified reference material; NR, natural regions; SSA, sub-Saharan Africa.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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“…For example, N application can increase Zn uptake, xylem transport and remobilization via the phloem, and hence the concentration of Zn in the grain (Erenoglu et al 2002(Erenoglu et al , 2011Kutman et al 2010Kutman et al , 2011Xue et al 2012), while excessive P fertilisation can reduce availability of Zn in the soil (Marschner 1993;Lu et al 2011). Manzeke et al (2012) reported that farmer fields in Zimbabwe receiving cattle manure or leaf litter in combination with NPK had greater concentrations of EDTA-extractable Zn in soils and greater concentrations of Zn in maize grain compared to unfertilised fields or those receiving only NPK, while rotation with legumes was also reported to increase concentration of Zn in maize grain.…”

Section: Introductionmentioning

confidence: 99%

Zinc-enriched fertilisers as a potential public health intervention in Africa

Stein²,

et al. 2015

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Background In this review, we examine the potential of Zn-enriched fertilisers to alleviate human dietary Zn deficiency. The focus is on ten African countries where dietary Zn supply is low and where fertiliser subsidies are routinely deployed on cereal crops. Scope Dietary Zn supply and deficiency prevalence were quantified from food supply and composition data. Typical effects of soil (granular) and foliar Zn applications on Zn concentrations in maize (Zea mays L.), rice (Oryza sativa L.) and wheat (Triticum aestivum L.) grains were based on a systematic literature review. Reductions in disease burdens attributable to Zn deficiency and cost-effectiveness were estimated using a disability-adjusted life years (DALYs) approach. Conclusions Baseline Zn supply in 2009 ranged from 7.1 (Zambia) to 11.9 (Mali) mg capita −1 day −1

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Soil fertility management effects on maize productivity and grain zinc content in smallholder farming systems of Zimbabwe

Cited by 61 publications

References 38 publications

Evaluation of soil fertility and fertilisation practices for irrigated maize (Zea mays L.) under Mediterranean conditions in Central Chile

Evaluation of soil fertility and fertilisation practices for irrigated maize (Zea mays L.) under Mediterranean conditions in Central Chile

Nitrogen effect on zinc biofortification of maize and cowpea in Zimbabwean smallholder farms

Zinc-enriched fertilisers as a potential public health intervention in Africa

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