South African Journal of Plant and Soil最新文献_第4页

Impact of cold plasma-mediated treatment on coated and packaged ‘Monterey’ strawberries during cold storage 冷等离子体介导处理对冷藏过程中包衣和包装的“蒙特利”草莓的影响

IF 0.9

South African Journal of Plant and Soil Pub Date : 2022-10-04 DOI: 10.1080/02571862.2022.2104946

Z. A. Belay, N. E. Nyamende, O. J. Caleb

引用次数: 3

Consumer acceptability of fried chips made from South African sweet potato cultivars 消费者对南非红薯品种油炸薯条的接受程度

IF 0.9

South African Journal of Plant and Soil Pub Date : 2022-10-04 DOI: 10.1080/02571862.2022.2103192

S. Laurie, WM Mphela

{"title":"Consumer acceptability of fried chips made from South African sweet potato cultivars","authors":"S. Laurie, WM Mphela","doi":"10.1080/02571862.2022.2103192","DOIUrl":"https://doi.org/10.1080/02571862.2022.2103192","url":null,"abstract":"In South Africa, the processing of sweet potatoes has a high potential for economic gain, therefore, chips were prepared from six sweet potato cultivars with varying flesh colours for consumer preference evaluation. Scoring was based on colour, crispness, taste and overall ranking by four groups of a total of 159 people at distinct locations. Instrumental assessment included colour measurement of chips, and dry mass and total carotenoid content of fresh roots. Analysis of variance, principal component analysis and Pearson correlation analysis were performed. Significant differences were found in taste/flavour, crispness and overall consumer ranking as well as for all instrumental measurements among chips made from the different cultivars. Orange-fleshed cultivars Bophelo, W-119 and Beauregard had values of 108.27, 112.37 and 113.33 µg/g for total carotenoids, respectively. The six cultivars were grouped into three clusters based on overall consumer rating, crispness, carotenoid content, colour a*, taste/flavour, oxidation and dry mass, colour L* and appearance. The results indicate that cultivars Beauregard and Bophelo can be recommended for making fried chips for South African consumers.","PeriodicalId":21920,"journal":{"name":"South African Journal of Plant and Soil","volume":"39 1","pages":"290 - 298"},"PeriodicalIF":0.9,"publicationDate":"2022-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47939258","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

Monilinia fructicola is not the causal agent of stone fruit rot in Zimbabwe Monilinia fruiticola不是津巴布韦核果腐烂的原因

IF 0.9

South African Journal of Plant and Soil Pub Date : 2022-10-04 DOI: 10.1080/02571862.2022.2104945

M. Mabika, N. Mapope, CC Chinheya, E. Ngadze, E. Carstens

引用次数: 0

Soil carbon stock assessment using depth and spatial models on afforested arable lands 基于深度和空间模型的造林耕地土壤碳储量评价

IF 0.9

South African Journal of Plant and Soil Pub Date : 2022-09-30 DOI: 10.1080/02571862.2022.2079741

Trevan Flynn, Liesl Wiese, Andrei Rozanov

{"title":"Soil carbon stock assessment using depth and spatial models on afforested arable lands","authors":"Trevan Flynn, Liesl Wiese, Andrei Rozanov","doi":"10.1080/02571862.2022.2079741","DOIUrl":"https://doi.org/10.1080/02571862.2022.2079741","url":null,"abstract":"The change from grasslands and natural shrubs to afforested arable land has a major impact on soil organic carbon (SOC) stocks. Grasslands are known to be SOC sinks as seen in the Chernozems of North America, Eurasia and South Africa. However, determining the SOC stocks of soils can be financially costly as each location must be sampled in depth increments. This study aimed to estimate the SOC stocks for the Mvoti catchment (30° 48′ E and 29° 18′ S) in Kwa-Zulu Natal, South Africa by developing depth functions on a limited number of soil samples and expanding these functions to known land-uses and soil types. The results showed that splines captured the short-term vertical distribution of SOC better than exponential decay functions, which has major implications on arable lands. Long-term forest plantations showed a positive correlation with SOC stocks (32.7 kg m−2), while annual crop cultivation (27.0 kg m−2) showed a negative correlation when compared to natural grasslands (28.8 kg m−2). The Cubist algorithm predicted the total SOC stock of the catchment area at between 12 248 and 17 624 Mg depending on the depth function used. Soils with yellow-brown subsoils tend to have higher SOC stocks and the lowest degree of uncertainty.","PeriodicalId":21920,"journal":{"name":"South African Journal of Plant and Soil","volume":"39 1","pages":"235 - 247"},"PeriodicalIF":0.9,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48259820","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

Effects of form, fineness and placement of lime with and without soil tillage on barley and canola growth and development 石灰的形态、细度和放置对大麦和油菜生长发育的影响

IF 0.9

South African Journal of Plant and Soil Pub Date : 2022-09-19 DOI: 10.1080/02571862.2022.2086308

JR van der Nest, A. Hardie, J. Labuschagne, Paul Swanepoel

{"title":"Effects of form, fineness and placement of lime with and without soil tillage on barley and canola growth and development","authors":"JR van der Nest, A. Hardie, J. Labuschagne, Paul Swanepoel","doi":"10.1080/02571862.2022.2086308","DOIUrl":"https://doi.org/10.1080/02571862.2022.2086308","url":null,"abstract":"No-tillage systems and slow movement of surface-applied limestone can lead to stratification of soil acidity. Incorporation of lime by tilling soil is not preferred by producers following conservation agriculture practices. There is limited research on ways to facilitate lime movement without soil disturbance. This study aimed to determine the effects of form, fineness and calcium carbonate equivalent (CCE) of calcitic lime on its movement in soil with or without different soil disturbance actions and consequent effects on productivity of barley (Hordeum vulgare L.) and canola (Brassica napus L.). A field trial was established in the Western Cape province, South Africa. Ten treatments included a control, lime with different forms and fineness, and tillage practices. Due to the slow movement and reactivity of lime in soil, it was unlikely that growth responses from barley or canola would be detected within the first two years following liming. A once-off strategic tillage action promoted crop growth. This was attributed to deeper redistribution of lime in the soil (15–30 cm depth), among secondary agronomic responses to tillage. Strategic once-off tillage may address the stratification of both soil acidity and nutrients, such as calcium (Ca) and magnesium (Mg), and could be considered as an option to incorporate into management of no-tillage production systems.","PeriodicalId":21920,"journal":{"name":"South African Journal of Plant and Soil","volume":"39 1","pages":"260 - 269"},"PeriodicalIF":0.9,"publicationDate":"2022-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46138768","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

Foliar fungicides provide chemical control of Fusarium head blight of wheat in South Africa 叶面杀菌剂对南非小麦枯萎病进行化学防治

IF 0.9

South African Journal of Plant and Soil Pub Date : 2022-07-15 DOI: 10.1080/02571862.2022.2087922

G. J. van Coller, F. Kloppers, V. Coetzee, Toinette van Rooyen, L. Rose, S. Lamprecht, A. Viljoen

{"title":"Foliar fungicides provide chemical control of Fusarium head blight of wheat in South Africa","authors":"G. J. van Coller, F. Kloppers, V. Coetzee, Toinette van Rooyen, L. Rose, S. Lamprecht, A. Viljoen","doi":"10.1080/02571862.2022.2087922","DOIUrl":"https://doi.org/10.1080/02571862.2022.2087922","url":null,"abstract":"Chemical control of a yield-limiting, quality-reducing wheat disease like Fusarium head blight (FHB) is an important management strategy; however, no fungicides are registered against it in South Africa. The aim of this study was to determine foliar fungicides and seed treatment efficacy for FHB management. Three commercial fungicides and two seed treatments were evaluated in a naturally infested field during 2011 and 2012. Significant interactions between the seed treatments and the foliar fungicides were obtained for FHB incidence and yield. When the fungicide Abacus® was sprayed in combination with either of the two seed treatments, FHB incidence was significantly decreased compared with use of the fungicide alone. Prosaro® sprayed in combination with Galmano® Plus as a seed treatment significantly decreased yield compared with the use of Prosaro alone or in combination with Vitavax® Plus as a seed treatment. The fungicide treatments significantly reduced FHB incidence and the percentage of Fusarium-damaged kernels (%FDK) when compared with control treatments, and significantly increased the yield. A weak but significant correlation was recorded between deoxynivalenol (DON) and %FDK. Strong negative correlations were observed between hectolitre mass (HLM) and FHB incidence and %FDK, respectively, and between yield and %FDK. These results indicate that the chemical control of FHB of wheat can be used to manage the disease in South Africa. Future research, therefore, must focus on integrating chemical control with host resistance to obtain optimal results.","PeriodicalId":21920,"journal":{"name":"South African Journal of Plant and Soil","volume":"39 1","pages":"278 - 289"},"PeriodicalIF":0.9,"publicationDate":"2022-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45601530","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

Long-term reference evapotranspiration trend and causative factors analysis in the sugarbelt area of the midlands of KwaZulu-Natal, South Africa 南非夸祖鲁-纳塔尔省中部糖带地区长期参考蒸散趋势及成因分析

IF 0.9

South African Journal of Plant and Soil Pub Date : 2022-05-27 DOI: 10.1080/02571862.2022.2069874

Zoleka Ncoyini-Manciya, M. J. Savage, S. Strydom, A. Clulow

{"title":"Long-term reference evapotranspiration trend and causative factors analysis in the sugarbelt area of the midlands of KwaZulu-Natal, South Africa","authors":"Zoleka Ncoyini-Manciya, M. J. Savage, S. Strydom, A. Clulow","doi":"10.1080/02571862.2022.2069874","DOIUrl":"https://doi.org/10.1080/02571862.2022.2069874","url":null,"abstract":"Global warming is widely recognised, and its effects are becoming apparent throughout the world. Evaporation and evapotranspiration, the key components of the hydrological cycle, are generally expected to increase due to the rise in air and surface temperatures. However, previous studies suggest a decrease in these phenomena despite the observed global warming. The decreasing evaporation and evapotranspiration have been attributed to various factors. In this study, reference evapotranspiration (ETo) trends estimated using the Penman-Monteith method were studied over the KwaZulu-Natal midlands area of South Africa for the period 1997–2017. This study employed the Mann–Kendall test and linear regression model to analyse annual and seasonal ETo trends. In addition, the trends of climate parameters and their contribution towards ETo variation were analysed. The results indicate a generally decreasing ETo trend for most weather stations studied over the study period. The climate variables analysed indicate an average decreasing trend in wind speed, solar irradiance, and relative humidity while average air temperature exhibited no significant change. Relative humidity and solar irradiance were found to greatly influence ETo variation in the study area. We therefore conclude that atmospheric condition studies should consider both local and global climate phenomena to understand the actual drivers of change in any atmospheric factor.","PeriodicalId":21920,"journal":{"name":"South African Journal of Plant and Soil","volume":"39 1","pages":"204 - 212"},"PeriodicalIF":0.9,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48625523","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: 2

Effect of lime source, fineness and granulation on neutralisation of soil pH 石灰来源、细度和造粒对土壤pH值中和的影响

IF 0.9

South African Journal of Plant and Soil Pub Date : 2022-05-27 DOI: 10.1080/02571862.2022.2043470

D. Du Toit, P. Swanepoel, A. Hardie

{"title":"Effect of lime source, fineness and granulation on neutralisation of soil pH","authors":"D. Du Toit, P. Swanepoel, A. Hardie","doi":"10.1080/02571862.2022.2043470","DOIUrl":"https://doi.org/10.1080/02571862.2022.2043470","url":null,"abstract":"Little information is available regarding the liming efficiency of various local lime sources and products currently available in South Africa. Recently, granulated micro-fine limes are being widely marketed as being superior to class A limes. Therefore, the aim of this study was to compare the effectiveness of various local, commercially available hydrated, calcitic and dolomitic lime sources (i.e., from different quarries) and forms (class A, micro-fine and granulated micro-fine) at increasing soil pH over time (365 days) under controlled conditions in two contrasting acid soils (sand and loam). Liming materials were applied adjusted for calcium carbonate equivalence (CCE) to achieve a target pHKCl of 5.5 and incubated at 85% field capacity. Micro-fine calcitic limes and hydrated limes increased pH the fastest (first 30–60 days), but the difference between these materials and class A limes attenuated over time. The difference in performance between class A limes was relatively minor (0.5 pH units), if applied based on CCE. Chemical purity (Ca%, CCE) was the main factor controlling liming effectiveness and particle fineness only related to the short-term reaction (4–7 days). Granulated limes showed the poorest performance in terms of pH correction attributed to poor solubility and spatial zonation of liming effects.","PeriodicalId":21920,"journal":{"name":"South African Journal of Plant and Soil","volume":"39 1","pages":"163 - 174"},"PeriodicalIF":0.9,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44259158","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: 3

Farm-scale digital soil mapping of soil classes in South Africa 南非土壤类别的农场规模数字土壤地图

IF 0.9

South African Journal of Plant and Soil Pub Date : 2022-05-27 DOI: 10.1080/02571862.2022.2059115

Trevan Flynn, A. Rozanov, F. Ellis, W. D. de Clercq, C. Clarke

{"title":"Farm-scale digital soil mapping of soil classes in South Africa","authors":"Trevan Flynn, A. Rozanov, F. Ellis, W. D. de Clercq, C. Clarke","doi":"10.1080/02571862.2022.2059115","DOIUrl":"https://doi.org/10.1080/02571862.2022.2059115","url":null,"abstract":"This study involved the evaluation of farm-scale digital soil classification in the Sandspruit catchment of the Western Cape Province, South Africa. The study aimed to evaluate a digital soil mapping (DSM) method, from feature selection, spatial predictions and sample design. The results showed that feature selection with the least absolute shrinkage and selection operator (LASSO) technique is a robust method as it had a high relative efficiency and achieved the highest accuracy for three out of the four soil classes predicted. This implies that covariate selection is the most notable aspect in DSM at the farm-scale. The top-performing predictive models achieved satisfactory results for soil associations (kappa = 0.64, accuracy = 74%), presence of a bleached topsoil (kappa = 0.64, accuracy = 74%) and soil depth (kappa = 0.48, accuracy = 74%), whereas only moderate results were achieved for soil texture (kappa = 0.43, accuracy = 66%). Lastly, the expert sampling locations had a higher average probability of occurrence (geographic and feature space distribution coverage) yet achieved similar performance to conditioned Latin hypercube sampling (cLHS).","PeriodicalId":21920,"journal":{"name":"South African Journal of Plant and Soil","volume":"39 1","pages":"175 - 186"},"PeriodicalIF":0.9,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47057938","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: 3

Yield, nutritional composition, and consumer acceptability of sweetpotato cultivars cultivated with soil amendments in the Middleveld of Eswatini 斯威士兰中部用土壤改良剂培育的甘薯品种的产量、营养成分和消费者可接受性

IF 0.9

South African Journal of Plant and Soil Pub Date : 2022-05-27 DOI: 10.1080/02571862.2022.2062623

Samuel Kofi Tutu, H. R. Mloza Banda, C. Tfwala

{"title":"Yield, nutritional composition, and consumer acceptability of sweetpotato cultivars cultivated with soil amendments in the Middleveld of Eswatini","authors":"Samuel Kofi Tutu, H. R. Mloza Banda, C. Tfwala","doi":"10.1080/02571862.2022.2062623","DOIUrl":"https://doi.org/10.1080/02571862.2022.2062623","url":null,"abstract":"Uncertainties about the effects of nutrient amendment on the culinary attributes of sweetpotato have limited fertiliser use in Eswatini. The study was carried out at a moist and dry location of Eswatini to investigate the culinary and nutritional attributes of sweetpotato cultivated with no amendments, cattle manure and/or inorganic fertiliser. Treatments were replicated three times in a 3 × 5 factorial arrangement using a randomised complete block design. Three sweetpotato varieties used: Ligwalagwala, Kenya White, and Lamngititi, with five nutrient amendments: no fertiliser/manure, 450 kg ha−1 NPK, 6 t ha−1 manure, 3 t ha−1 manure + 225 kg ha−1 NPK, and 4.5 t ha−1 manure + 112.5 kg ha−1 NPK. Yield differences of 59.8% and 47.3% over the control were recorded with Kenya White and 3 t ha−1 manure + 225 kg ha−1 NPK, and 4.5 t ha−1 manure + 112.5 kg ha−1 NPK at Malkerns and Luve, respectively. Protein, calcium, and magnesium content of the varieties improved under 4.5 t ha−1 manure + 112.5 kg ha−1 NPK amendments. Taste, flavour, palatability, and acceptability accounted for the greatest amount of culinary variability while soil amendments contributed the least. The present study suggests that nutrient amendments contribute to the agronomic performance and nutritional quality of sweetpotato.","PeriodicalId":21920,"journal":{"name":"South African Journal of Plant and Soil","volume":"39 1","pages":"187 - 197"},"PeriodicalIF":0.9,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48000066","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