Does water-saving irrigation improve the quality of fruits and vegetables? Evidence from meta-analysis

Adu, Michael O.; Yawson, David O.; Abano, Ernest Ekow; Asare, Paul A.; Armah, Frederick Ato; Opoku, Eugene Kwabena

doi:10.1007/s00271-019-00646-2

Cited by 20 publications

(28 citation statements)

References 80 publications

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“…The predefined study inclusion criteria were: (i) the study had to report at least one root trait measured under both low or no K treatment (experimental treatment) and high or replete K treatment (control); (ii) the root traits should be reported on the same scale for both the experimental and the control treatments; (iii) the environmental conditions for the experimental and control groups, including plant species, and soil properties of each experiment were the same, and experiments were performed at the same temporal and spatial scales in the control and treatment groups; (iv) an included study must report means (X) for the measured trait(s) and the reported X, sample size (n) and a measure of dispersion (standard error [SE], standard deviation [SD], or 95% confidence interval [CI]) should be present as numerical or graphical data, or it should be possible to estimate from the reported data. In studies where SEs were provided, SDs were computed as the product of the SE and the square-root of n. However, where SD or SE was not available, SD was reassigned as one-tenth of the X and the effect of this assumption on the results assessed via sensitivity analyses [29,30]. To avoid multiple counting, the reported data must originate from primary research, and should not have been already included in another paper.…”

Section: Data Collectionmentioning

confidence: 99%

“…11 n and 12 n are the sample sizes; of subgroups 1 and 2 [31]. If a study, however, reported data on different crops or varieties of crops, these were considered as independent subgroups and were included separately in the meta-analysis if the data reported were single time-point data for the different crops species or varieties [29,30].…”

Section: Handling Of Complex Data Structuresmentioning

confidence: 99%

“…We quantified the effects of K supply on root traits by calculating the response ratio (R), which is the ratio of the means of the experimental and control groups. The R was our preferred metric of effect size because we were interested in comparing the magnitudes of two means from the experimental and control treatments and we could back-transform it (i.e., R = e lnR ) for ease in interpretation [30]. Given that ratios are said to generally have poor statistical properties; the R was subsequently log-transformed by Eq.…”

Section: Estimation Of Effect Sizes and Analysis Of Heterogeneitymentioning

confidence: 99%

“…To examine whether root traits differed among treatments, variation was estimated by a Q statistic, a measure that partitions total heterogeneity (Q T ) into variance explained by the model (Q M or Q B ) and residual error not explained by the model (Q E or Q W ; i.e. Q T = Q M + Q E ) [30,35,38]. Q B and Q W were tested against a X 2 -distribution (significance level p < 0.05) [35,38].…”

Section: Moderator Analysesmentioning

confidence: 99%

“…A pooled synthesis of the evidence from individual studies is required to show the most probable modifications and permit reasonable and reliable generalizations on the effect of K starvation on RSA of crop plants. Though a narrative review on the effect of K nutrition on root growth and development [28] exists, it has some of the limitations of narrative reviews that are addressed by meta-analysis [29,30]. A key limitation is that the narrative review by [28] did not quantify the modifications in given root traits as a result of K starvation.…”

Section: Introductionmentioning

confidence: 99%

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A Meta-Analysis of Modifications of Root System Traits of Crop Plants to Potassium (K) Deprivation

Yawson¹,

Amoah²,

Asare³

et al. 2021

Plant Roots

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Unlike nitrogen (N) and phosphorus (P), morphological responses of root systems of crop plants to potassium (K) dynamics in soils or growth media are only gaining currency. This is due to the realization of the instrumental role of K in several cellular and tissue level processes crucial for the growth, stress tolerance, metabolic functions, and yield of crop plants, and ultimately, food security and sustainable agriculture. This chapter used meta-analysis to synthesize the pooled evidence for modifications in several root system traits of different crop plants under conditions of K starvation in different growth media. In all, 37 studies that passed inclusion/exclusion criteria, from 1969 to 2019, were analyzed in aggregate and then disaggregated for root biomass, root length, and the number of roots. Three moderators were analyzed: type of soil or growth medium, crop, and K fertilizer applied in the included studies. The aggregated results show that the cumulative effect of K deprivation was a significant and large reduction (about 25.5 ± 15.0%) in the bulk of root system traits considered, which was slightly lower than the reduction in shoot- or yield-related traits. Reductions of approximately 38 ± 38.0% in root biomass and 23.2 ± 18.6% in root length were observed, and the magnitudes of reduction were comparable to those observed from the disaggregated data. Though reductions in root system traits due to K starvation occurred under both greenhouse/lab and field conditions, the cumulative reduction in the former was significantly larger than that of the latter. Among the moderators, the effect of type of soil (or growth media) and crop on the scale of modification of root system traits to K deprivation are stronger compared to the effect of type of K fertilizer applied. It is concluded that, overall, K deprivation leads to significant reductions in root system traits, especially root biomass and length in soils and perlite regardless of the type of K fertilizer applied. Attention should be given to K management in cropping systems to avoid K starvation, especially at the early and vegetative stages, and to improve K reserves in soils. Further attention should be given to the responses of root system traits to K supply when matching crops to soils.

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Section: Data Collectionmentioning

confidence: 99%

Section: Handling Of Complex Data Structuresmentioning

confidence: 99%

Section: Estimation Of Effect Sizes and Analysis Of Heterogeneitymentioning

confidence: 99%

Section: Moderator Analysesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A Meta-Analysis of Modifications of Root System Traits of Crop Plants to Potassium (K) Deprivation

Yawson¹,

Amoah²,

Asare³

et al. 2021

Plant Roots

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Farmers' green technology adoption: Implications from government subsidies and information sharing

Hong,

Chen,

Gong

et al. 2023

Naval Research Logistics

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While the previous literature on green technology adoption has not fully considered information sharing, we consider the impact of demand information sharing on the adoption of green technologies by risk‐averse farmers in a vertical agricultural supply chain. We find that government subsidies and information sharing do not always promote farmers' adoption of green technologies. The accuracy of the information plays a vital role in promoting farmers' adoption of green technologies; however, the increased green technology adoption induced by more accurate information may be detrimental to farmer welfare in the presence of production diseconomies. Information sharing can reduce the amount of government subsidies for promoting green technology adoption, thereby suggesting the substitutable role of information and monetary instruments. Nonetheless, information‐sharing may lead to lower water savings and thus should be adopted with caution. Risk aversion has a nontrivial impact on agricultural technology adoption: farmers are more likely to adopt traditional agricultural technologies when their risk aversion is either very low or very high. Finally, we validate our decision model with U.S. Department of Agriculture cotton production data and propose management insights to help farmers make appropriate adoption decisions under information asymmetry and risk‐averse attitudes.

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Zeolite‐based polymer composite films for vegetables and fruits packaging: A review

Hosseinnia,

Alaee,

Tabarzadi

et al. 2023

Vinyl Additive Technology

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The deterioration of fruits during production, transportation, and storage has become one of the main challenges in supplying fruits based on consumer requirements. Therefore, the application of suitable packaging containing effective additives to improve the properties of the used film, is very important. In this article, the studies were conducted on the use of Zeolite as an effective additive to improve the properties of polymer packaging films owing to its high porosity and low toxicity. The results showed that the presence of zeolite in a packaging film can lead to the improvement of visual observation and firmness, reduction of weight loss and total soluble solids (TSS), and increase in the pH of the packed fruits. The results obtained from reviewing the literature show that the use of zeolite has different effects on the gas permeation or adsorption through the packaging films which can control the degradative parameters of fruits and vegetables. Surface modifiers can increase the efficiency of zeolites in packaging films which are also evaluated in this article.Highlights Packaging of fruits with the use of polymer films and zeolite as an additive increases their shelf life. Ethylene is a flammable gas with the formula C2H4 that accelerates the fruit ripening. Zeolites are hydrated aluminosilicates of alkali or alkaline earth cations that are crystalline and microporous. Zeolites are widely used in the packaging of polymeric composites, due to their chemical structure and unique characteristics. The visual features, firmness, pH, TSS, TA, and weight loss are factors to be investigated for each fruit.

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Does water-saving irrigation improve the quality of fruits and vegetables? Evidence from meta-analysis

Cited by 20 publications

References 80 publications

A Meta-Analysis of Modifications of Root System Traits of Crop Plants to Potassium (K) Deprivation

A Meta-Analysis of Modifications of Root System Traits of Crop Plants to Potassium (K) Deprivation

Farmers' green technology adoption: Implications from government subsidies and information sharing

Zeolite‐based polymer composite films for vegetables and fruits packaging: A review

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