South African Journal of Plant and Soil最新文献_第2页

The efficiency of cassava–Bambara groundnut intercropping according to the sowing date of cassava 根据木薯播期比较木薯与班巴拉花生间作的效率

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South African Journal of Plant and Soil Pub Date : 2023-06-15 DOI: 10.1080/02571862.2023.2206166

K. Konan, Kouadio I Kouassi, B. S. Bonny, B. T. S. Doubi, B. Zoro, D. O. Dogbo

{"title":"The efficiency of cassava–Bambara groundnut intercropping according to the sowing date of cassava","authors":"K. Konan, Kouadio I Kouassi, B. S. Bonny, B. T. S. Doubi, B. Zoro, D. O. Dogbo","doi":"10.1080/02571862.2023.2206166","DOIUrl":"https://doi.org/10.1080/02571862.2023.2206166","url":null,"abstract":"The objective of this study was to propose a profitable cropping association date between cassava (Manihot esculenta) and Bambara groundnut (Vigna subterranea, also known as voandzou) through the examination of competition indices. The association of the cassava varieties Allada agba, Bonoua, Six mois and Yacé with the bouquet and creeping morphotypes of Bambara groundnut was tested at different cassava sowing dates: 0, 15 and 30 days after sowing of the bouquet Bambara groundnut and 0, 15, 30, 45 and 60 days after sowing the creeping Bambara groundnut. These cropping association systems were evaluated through competition indices in Côte d’Ivoire: the area–time equivalent ratio (ATER), the competitiveness rate (CR) and the relative dominance coefficient (K). ATER and K values were greater than unity when cassava was sown 15 to 30 days after sowing the bouquet Bambara groundnut and 30 to 45 days after sowing the creeping Bambara groundnut. Cassava varieties were more competitive than the Bambara groundnut morphotypes (CRC > CRV). The best results in terms of efficient land use (ATER > 1) and yield gain (K > 1) were obtained when cassava was sown 30 days after Bambara groundnut. However, for the Bonoua–Bambara groundnut creeping association, the yield gain was obtained when cassava was sown 45 days after Bambara groundnut.","PeriodicalId":21920,"journal":{"name":"South African Journal of Plant and Soil","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48423008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bioprospecting for active compounds: impact of milling, extract fractions and freeze-drying on targeted terpene compounds of Helichrysum odoratissimum (L.) Sweet 活性化合物的生物勘探:碾磨、提取和冷冻干燥对香蜡菊萜类化合物的影响甜蜜的

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South African Journal of Plant and Soil Pub Date : 2023-03-15 DOI: 10.1080/02571862.2023.2196733

Neliswa A. Matrose, Z. A. Belay, Obikeze Kenechukwu, L. Mokwena, O. J. Caleb

{"title":"Bioprospecting for active compounds: impact of milling, extract fractions and freeze-drying on targeted terpene compounds of Helichrysum odoratissimum (L.) Sweet","authors":"Neliswa A. Matrose, Z. A. Belay, Obikeze Kenechukwu, L. Mokwena, O. J. Caleb","doi":"10.1080/02571862.2023.2196733","DOIUrl":"https://doi.org/10.1080/02571862.2023.2196733","url":null,"abstract":"This study investigated the effect of processing and freeze-drying on targeted volatile compounds (terpenes) of Helichrysum odoratissimum (L.) Sweet. Air-dried plant material was processed to obtain: (i) roughly ground leaves and stems (RGMHO); (ii) finely ground leaves and stems (FGMHO); and (iii) wool-like fraction (WLMHO). Terpene content of the air-dried samples, crude ethanol extract (CE, filtrate), sediments and freeze-dried (FDE) powders from the different processed fractions were analysed using gas chromatography-mass spectrometry (GC-MS). Results showed that the highest α-pinene (91.3 µg l−1) was obtained in the CE compared to the freeze-dried (≈3.0 µg l−1) extracts (p ≤ 0.05). Eucalyptol was significantly higher in the air-dried leaves (27.3 µg l−1) than were CE and FDE (4.0 and 0.9 µg l−1 respectively), while β-caryophyllene, pulegone and humulene contents were significantly higher in the FDE samples (p ≤ 0.05). These results demonstrated that processing had significant impact on the concentration of targeted terpenes in H. odoratissimum. This study is the first report on the identification and quantification targeted terpenes in H. odoratissimum (L.) Sweet.","PeriodicalId":21920,"journal":{"name":"South African Journal of Plant and Soil","volume":"40 1","pages":"127 - 132"},"PeriodicalIF":0.9,"publicationDate":"2023-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59237600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluating the effects and benefits of cover crops in citrus orchards: a review 柑桔园覆盖作物的效益评价综述

South African Journal of Plant and Soil Pub Date : 2023-03-15 DOI: 10.1080/02571862.2023.2236075

Sibongiseni Silwana, Azwimbavhi Reckson Mulidzi, Nebo Jovanovic

{"title":"Evaluating the effects and benefits of cover crops in citrus orchards: a review","authors":"Sibongiseni Silwana, Azwimbavhi Reckson Mulidzi, Nebo Jovanovic","doi":"10.1080/02571862.2023.2236075","DOIUrl":"https://doi.org/10.1080/02571862.2023.2236075","url":null,"abstract":"AbstractCover crops are used in sustainable agricultural practices to improve soil quality and minimise the effect of climate change, water restrictions and drought. The South African citrus industry produces and exports a diverse range of citrus fruits; however, knowledge of cover crops in citrus orchards in South Africa is limited. This review focuses mostly on evaluating cover crop selection, effects on the soil microbial community, weed control, citrus yield and fruit quality. In terms of cover crop selection, legumes seem to be preferred over non-legume cover crops. The reviewed literature reported that legume cover crops increased nitrogen by 67 to 209 kg N ha−1 through the nitrogen fixation process. Additionally, the cultivation of legume cover crops substantially improved the cost savings of nitrogen fertiliser. The fruit yield improved by 7.6 to 64%, while fruit quality improved by 2.3 to 12.4% fruit weight and 2.4 to 5.8% Bx. This demonstrates that the benefits of cover crops to South African citrus growers include improved soil quality and fruit yields and decreased costs.Keywords: fruit yieldlegumesnitrogen fixationorganic carbonorganic mattersoil microbial communitySouth Africatree shading","PeriodicalId":21920,"journal":{"name":"South African Journal of Plant and Soil","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135747771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The effect of crop rotation and tillage practice on residue decomposition and wheat performance in the Western Cape, South Africa 南非西开普省轮作和耕作方式对秸秆分解和小麦生产性能的影响

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South African Journal of Plant and Soil Pub Date : 2023-01-01 DOI: 10.1080/02571862.2022.2160881

Johannes Stephanus Theron, G. J. van Coller, L. Rose, J. Labuschagne, P. Swanepoel

{"title":"The effect of crop rotation and tillage practice on residue decomposition and wheat performance in the Western Cape, South Africa","authors":"Johannes Stephanus Theron, G. J. van Coller, L. Rose, J. Labuschagne, P. Swanepoel","doi":"10.1080/02571862.2022.2160881","DOIUrl":"https://doi.org/10.1080/02571862.2022.2160881","url":null,"abstract":"Conservation agriculture relies on residue retention, crop rotation and reduced tillage. Crop rotation determines residue type, while tillage affects residue load and distribution. Although crop residue retention is often beneficial, residues can create challenges, including obstruction of planters during establishment and stubble-borne diseases. This study determined the effects of crop rotation and tillage on the residue decomposition and response of wheat (Triticum aestivum L.) in the Western Cape Province, South Africa. Wheat response was investigated to determine relationships between residue decomposition and its agronomic performance. Crop rotations in long-term trials in areas of the Swartland and southern Cape consisted of the following: wheat–medics, lupin–wheat–canola–wheat, canola–wheat–lupin–wheat, and a wheat monoculture. Crops were established with four tillage practices: conventional tillage (CT: chisel plough followed by soil inversion/ploughing, tine planter establishment), minimum tillage (MT: chisel plough, tine planter establishment), no-tillage (NT: direct drilling with tine planter) and zero tillage (ZT: direct drilling with double disc planter). Crop rotation had no effect on residue decomposition but increased wheat leaf area and grain yield when rotated with medics, lupin and canola when compared with monoculture wheat. ZT increased residue load and improved seedling establishment. ZT (50.9%) and NT (51.1%) increased residue decomposition compared with CT (34%). Faster residue decomposition could be achieved with less soil disturbance.","PeriodicalId":21920,"journal":{"name":"South African Journal of Plant and Soil","volume":"40 1","pages":"13 - 22"},"PeriodicalIF":0.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43226748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Spatial interpolation of vertisol physico-chemical properties through ordinary kriging in south-eastern Zimbabwe 津巴布韦东南部垂直溶胶理化性质的普通克里格法空间插值

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South African Journal of Plant and Soil Pub Date : 2023-01-01 DOI: 10.1080/02571862.2023.2168077

Muketiwa Chitiga, G. Soropa, T. Dube, Progress Sengera

{"title":"Spatial interpolation of vertisol physico-chemical properties through ordinary kriging in south-eastern Zimbabwe","authors":"Muketiwa Chitiga, G. Soropa, T. Dube, Progress Sengera","doi":"10.1080/02571862.2023.2168077","DOIUrl":"https://doi.org/10.1080/02571862.2023.2168077","url":null,"abstract":"A decline in sugarcane yields from Block G (∼400 ha) of GreenFuel’s Chisumbanje Estate in south-eastern Zimbabwe prompted a study on spatial variability of the soil physico-chemical parameters in the 2017–2018 farming season. Using a systematic gridding schema, 123 geo-located soil samples from 16 sub-blocks were extracted from a depth of 0.3 m and analysed for various parameters. The results showed that pH was slightly acidic to alkaline (6.13–7.95) and had the lowest variability (CV ±15%). Low (N, P, Fe and Zn) and adequate (K and Cu) levels of mineral nutrients were also observed. However, some nutrients were highly variable, with P, Fe and Zn revealing the largest variability (CV ±35%). Semivariogram analysis showed a weak (clay, soil organic matter and N), moderate (pH, P, Mn and Zn) or strong (K, Fe and Cu) spatial correlation between the measured and predicted values. To optimise soil fertility and reduce variations, it is recommended that the estate employ variable-rate fertiliser application technologies, nutrient-monitoring systems, and precision satellite-based guidance for machinery. The study generated soil fertility maps using ordinary kriging; this will serve as a future reference for soil test-based fertiliser recommendations, soil fertility monitoring, and identifying spatial variability on the estate.","PeriodicalId":21920,"journal":{"name":"South African Journal of Plant and Soil","volume":"40 1","pages":"46 - 57"},"PeriodicalIF":0.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49395879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Optimising the rate and stages of application of nitrogen fertiliser for stevia under greenhouse conditions 在温室条件下优化甜菊的氮肥施用速率和阶段

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South African Journal of Plant and Soil Pub Date : 2023-01-01 DOI: 10.1080/02571862.2022.2137591

Alireza Eslami-Firouzabadi, M. Karimi, Ali Abbasi-surki, A. Shafeinia, Fatemeh Derikvand-Moghadam

{"title":"Optimising the rate and stages of application of nitrogen fertiliser for stevia under greenhouse conditions","authors":"Alireza Eslami-Firouzabadi, M. Karimi, Ali Abbasi-surki, A. Shafeinia, Fatemeh Derikvand-Moghadam","doi":"10.1080/02571862.2022.2137591","DOIUrl":"https://doi.org/10.1080/02571862.2022.2137591","url":null,"abstract":"Nitrogen (N) is the nutrient most used by crop producers and its application may affect the N use efficiency in crop production. The present study was conducted in order to determine the optimum N fertiliser rate and application stages (S) for stevia (Stevia rebaudiana Bertoni) production for the first cutting, under greenhouse conditions. A two-factorial experiment with four N fertiliser rates (0, 40, 80 and 120 kg ha−1 applied as urea) and three stages (sole split N applied at sowing; dual split N applied at sowing and one month after sowing; triple split N applied at sowing, one and two months from sowing) were laid out in a completely randomised design. Each treatment combination was replicated three times. The plants were grown in boxes (1 m−2, 40 cm high) filled with loam soil and the treatments were applied as described. Results showed that stevia growth and metabolites were significantly affected by N rates and application stages. Stevia leaf area index (LAI), leaf yield, leaf/stem ratio and harvest index (HI), steviol glycosides (SVglys) content, SVglys compositions and yield were the highest when 40 kg N ha−1 was applied in two stages. This was also true for leaf and SVglys yield. Splitting of N application of 120 kg ha−1 into three stages showed an inhibitory effect on some stevia traits such as SVglys content and yield. Based on the current results and efficient N application, 40 kg N ha−1 split into two stages is recommended for stevia production under greenhouse conditions.","PeriodicalId":21920,"journal":{"name":"South African Journal of Plant and Soil","volume":"40 1","pages":"58 - 63"},"PeriodicalIF":0.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42577430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sugarcane cultivar genetic gains for coastal agro-ecological regions of South Africa 南非沿海农业生态区甘蔗品种遗传增益

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South African Journal of Plant and Soil Pub Date : 2023-01-01 DOI: 10.1080/02571862.2022.2148007

Marvellous M. Zhou

{"title":"Sugarcane cultivar genetic gains for coastal agro-ecological regions of South Africa","authors":"Marvellous M. Zhou","doi":"10.1080/02571862.2022.2148007","DOIUrl":"https://doi.org/10.1080/02571862.2022.2148007","url":null,"abstract":"Cultivar genetic gains quantify the increase in productivity from release of cultivars and measure genetic improvements from plant breeding. The objectives of this study were to evaluate the genetic gains from sugarcane coastal cultivars and evaluate their contribution to productivity. Data were derived from replicated plant breeding and post-release variety evaluation trials conducted by the South Africa Sugarcane Research Institute (SASRI) from 1996 to 2020. There were significant cultivar differences for cane yield, sucrose content, sugar yield, fibre % and purity %. Significant analyses of cultivar by location, cultivar by crop-year and cultivar by location by crop-year indicate further optimisation of cultivar disposition is needed to increase productivity. Cultivar genetic gains were found for cane yield (0.19–0.48 t ha−1), sucrose content (0.01–0.02%), sugar yield (0.03–0.07 t ha−1 per year), fibre % cane (0.04–0.06%) and purity % (0.02–0.04%), highlighting the increased yield and quality from genetic improvement. The best cultivars produced 8–22% higher sugar yields than popular cultivars indicating that planting high yield cultivars did increase yields. Sugar cane production declined at a slower rate than area planted, also showing the benefit of high yield cultivars. Increasing the area planted to new, higher yielding cultivars will increase sugar yields for coastal regions of South Africa.","PeriodicalId":21920,"journal":{"name":"South African Journal of Plant and Soil","volume":"40 1","pages":"1 - 12"},"PeriodicalIF":0.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49416879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An allele-specific PCR assay for detection of mutations that confer benzimidazole resistance and zoxamide sensitivity in Phyllosticta citricarpa 等位基因特异性聚合酶链式反应检测柑橘叶中苯并咪唑抗性和唑酰胺敏感性突变

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South African Journal of Plant and Soil Pub Date : 2023-01-01 DOI: 10.1080/02571862.2023.2185693

B. Coetzee, E. Carstens, G. C. Schutte, E. Basson, Mia J Groeneveld, Tankiso Mpholo, P. Moyo, Jessica C Winn, P. Fourie, A. V. D. van der Merwe

{"title":"An allele-specific PCR assay for detection of mutations that confer benzimidazole resistance and zoxamide sensitivity in Phyllosticta citricarpa","authors":"B. Coetzee, E. Carstens, G. C. Schutte, E. Basson, Mia J Groeneveld, Tankiso Mpholo, P. Moyo, Jessica C Winn, P. Fourie, A. V. D. van der Merwe","doi":"10.1080/02571862.2023.2185693","DOIUrl":"https://doi.org/10.1080/02571862.2023.2185693","url":null,"abstract":"Phyllosticta citricarpa is the causative agent of citrus black spot (CBS), a cosmetic fungal disease that has been reported in most of the citrus-growing regions of the world. The occurrence of CBS in orchards is predominantly controlled by the application of fungicides during the fruit susceptibility period. Benzimidazoles (benomyl and carbendazim) and toluamides (ethaboxam and zoxamide) are two systemic fungicide classes suitable for the control of CBS in South Africa. Both inhibit proper assembly of the fungal β-tubulin protein during mitosis, and resistance to these fungicides is primarily related to alterations in the binding sites on this target protein. In this study, P. citricarpa isolates with known resistance status were subjected to whole genome sequencing, the mutations conferring resistance to benomyl and zoxamide were examined and allele-specific primers targeting these mutations were developed. The allele-specific multiplex PCR assay for the detection of benomyl resistance in P. citricarpa will eliminate the need for laborious and time-consuming sensitivity assays or DNA sequencing.","PeriodicalId":21920,"journal":{"name":"South African Journal of Plant and Soil","volume":"40 1","pages":"69 - 76"},"PeriodicalIF":0.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46924886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Predicting soil carbon in granitic soils using Fourier-transform mid-infrared (FT-MIR) spectroscopy: the value of database disaggregation 傅里叶变换中红外光谱(FT-MIR)预测花岗岩土壤碳:数据库分解的价值

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South African Journal of Plant and Soil Pub Date : 2023-01-01 DOI: 10.1080/02571862.2023.2180098

Kelebohile Rose Seboko, J. V. van Tol, E. Kotzé

{"title":"Predicting soil carbon in granitic soils using Fourier-transform mid-infrared (FT-MIR) spectroscopy: the value of database disaggregation","authors":"Kelebohile Rose Seboko, J. V. van Tol, E. Kotzé","doi":"10.1080/02571862.2023.2180098","DOIUrl":"https://doi.org/10.1080/02571862.2023.2180098","url":null,"abstract":"Soil carbon (C) is an important component in quality assessments and efficient models are required to estimate C rapidly. Accurate C assessments are valuable in monitoring land-use changes. Fourier-transform mid-infrared (FT-MIR) spectroscopy has proved to be a powerful tool for assessing C. The potential of FT-MIR spectroscopy to estimate C was evaluated using the following techniques: (1) three algorithms [partial least squares (PLS)], principal component regression (PCR), and classical least squares (CLS); and (2) disaggregating the dataset into subgroups based on soil depth and texture. The C contents of samples collected in the Johannesburg Granite Dome were determined by dry combustion for comparison. The soils ranged considerably in C (0.123–2.650%), clay (2.80–41.20%), and silt content (8.56–23.75%). Using standard normal variant (SNV), Savitzky-Golay smoothing and PLS, the best-performing model was the horizons subgroup which provided values of root mean square error for prediction (RMSEP) between 0.079 and 0.095%, root mean square error for calibration (RMSEC) = 0.041 − 0.092, r 2 pre = 0.6174–0.8459, r 2 cal = 0.6599–0.9778, residual prediction variation (RPD) = 2.404–2.753, and ratio of performance to interquartile range (RPIQ) = 2.667–3.454. The pronounced accuracy of FT-MIR spectroscopy coupled with PLS, pre-processing techniques, and textural subgroups confirms the potential of infrared spectroscopy as an efficient tool for estimating C content. Future studies should investigate the combined effects of FT-MIR spectroscopy and subgroups grouped according to soil types and land-uses when predicting C.","PeriodicalId":21920,"journal":{"name":"South African Journal of Plant and Soil","volume":"40 1","pages":"23 - 33"},"PeriodicalIF":0.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42145230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Low magnesium content in potato tubers associated with mass loss during storage 马铃薯块茎中的低镁含量与贮藏过程中的质量损失有关

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South African Journal of Plant and Soil Pub Date : 2023-01-01 DOI: 10.1080/02571862.2022.2144959

R. Gericke, Njj Combrink, M. van der Rijst

{"title":"Low magnesium content in potato tubers associated with mass loss during storage","authors":"R. Gericke, Njj Combrink, M. van der Rijst","doi":"10.1080/02571862.2022.2144959","DOIUrl":"https://doi.org/10.1080/02571862.2022.2144959","url":null,"abstract":"Potatoes are an important crop in the Sandveld and Kouebokkeveld regions of South Africa, and one of the challenges in effective potato production is maintaining quality post-harvest. In order to identify tuber characteristics that may be used to predict keeping quality of potatoes from the sandy soils of these regions, tuber, soil, and water samples were taken from different growers who planted the cultivar Sifra. Sampling started in January 2016 and ended in July 2017. Skinning potential, determined by thumb rubbing, chemical composition, and specific gravity (SG) were evaluated one day after hand harvesting. Undamaged tubers were kept at room temperature for 42 days whereafter mass loss and firmness were evaluated. Pearson correlations and Partial Least Squares Regression (PLS-R) were done to investigate the association between tuber quality characteristics and tuber, soil and water cations. Tuber firmness after storage showed a high positive correlation with tuber magnesium (Mg) levels, and was associated with reduced skinning potentials and lower mass loss percentages. Tubers with Mg levels lower than 0.13% had high skinning potentials with mass loss percentages higher than 4.5% during storage. Irrigation with water rich in sodium (Na) tended to limit mass loss, possibly due to the associated high levels of Mg in those water sources.","PeriodicalId":21920,"journal":{"name":"South African Journal of Plant and Soil","volume":"40 1","pages":"64 - 68"},"PeriodicalIF":0.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48722659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0