{"id":53643,"date":"2023-02-27T06:01:15","date_gmt":"2023-02-27T04:01:15","guid":{"rendered":"https:\/\/novanews.co.za\/weslander\/studie-help-teen-kroonvrot-20230222-2\/"},"modified":"2025-03-21T14:40:31","modified_gmt":"2025-03-21T12:40:31","slug":"studie-help-teen-kroonvrot-20230222-2","status":"publish","type":"post","link":"https:\/\/novanews.co.za\/weslander\/studie-help-teen-kroonvrot-20230222-2\/","title":{"rendered":"Studie help teen kroonvrot"},"content":{"rendered":"\n

Bewaringslandboubeginsels kan Fusarium-kroonvrot by koring help bestuur.<\/p>\n\n\n\n

Wes-Kaapse koringprodusente wat volgens bewaringslandboubeginsels boer, moet poog om geenbewerking met skyfplanters en wisselbou met bre\u00ebblaarplante toe te pas om uitbreking van Fusarium-kroonvrot (FKV) te beperk. <\/p>\n\n\n\n

D\u00edt is die gevolgtrekking in \u2019n nuwe Suid-Afrikaanse studie oor die uitwerking van wisselbou en verskillende bewerkingspraktyke op die beheer van graansiekte, wat w\u00eareldwyd kop uitsteek.<\/p>\n\n\n\n

Die studie is deur Stephan Theron as deel van sy onlangse MSc-studies in agronomie aan die Universiteit Stellenbosch gedoen.<\/p>\n\n\n\n

Bewaringslandboupraktyke soos wisselbou, die behoud van plant-residu en so min as moontlik versteuring van die grond word wyd in die Wes-Kaap se koringstreke toegepas. <\/p>\n\n\n\n

FKV word veroorsaak deur die Fusarium pseudograminearum<\/span>-fungus en kom w\u00eareldwyd voor. Dit is ook een van die mees verwoestende koringsiektes in die Wes-Kaap. Dit be\u00efnvloed die gehalte van koring en kan die opbrengs van oeste in sommige gevalle met tot 40% verminder. Deskundiges glo dit sal al meer voorkom en kan \u2019n al groter gevolg h\u00ea namate droogtes toeneem en langer duur.<\/p>\n\n\n\n

\u201cDie voorspellings is dat droogtes in die toekoms in die Wes-Kaap weens klimaatsverandering sal toeneem. Daarom is dit belangrik dat ons leer hoe om FKV plaaslik ten beste te bestuur en nie net bloot riglyne te volg wat in ander lande met \u2019n ander klimaat en grondsoorte as by ons opgestel is nie,\u201d s\u00ea Theron.<\/p>\n\n\n\n

Sy eksperimentele werk is uitgevoer as deel van bestaande langtermynstudies van grondgehalte op twee van die Wes-Kaapse departement van landbou se navorsingsplase: Tygerhoek in die Suid-Kaap en Langgewens in die Swartland. <\/p>\n\n\n\n

Sy studie is deur die Suid-Afrikaanse Graanbedryftrust gefinansier.<\/p>\n\n\n\n

Om die uitwerking van wisselbou te bestudeer, is die aanplant van graan in die 2020- en 2021-koringseisoene met \u00f3f canola (Brassica napus<\/span>), lupine (Lupinus spp<\/span>.) \u00f3f eenjarige medics (Medicago spp<\/span>.) afgewissel. Die uitwerking van hierdie behandelings is vergelyk met koring wat as deel van \u2019n monokultuurstelsel geplant is.<\/p>\n\n\n\n

Saam met elke wisselbou-aanplanting het Theron ook die invloed van verskillende bewerkingspraktyke getoets. Volgens sy bevindings werk die gebruik van wisselbou met bre\u00ebblaar-gewasse goed om die voorkoms en graad van FKV te verminder, vergeleke met wanneer slegs koring voortdurend binne \u2019n monokultuurstelsel geplant word. Dit het ook die opbrengs en gehalte van die koringoes verbeter.<\/p>\n\n\n\n

\u201cWisselbou met nie-gasheergewasse \u2013 in ons geval canola, medics en lupine \u2013 het almal die verskillende FKV-parameters verminder. Dis hoofsaaklik deur die siektesiklus gedoen en die opbou daarvan oor jare heen te verbreek.<\/p>\n\n\n\n

\u201cDie voorkoms en erns van die siekte is verminder met geenbewerking, waar meer gewas-residu op die grondoppervlak behou is. Hierdie praktyk be\u00efnvloed nie die opbrengs of gehalte van die graan nie,\u201d het Theron bygevoeg. <\/p>\n\n\n\n

Met geenbewerking is sade vlakker geplant as tydens bewerking met grondversteuring. Dit lei daartoe dat die sub-kroon-internode (subnode) korter is as wanneer sade dieper geplant word. \u2019n Korter sub-kroon-internode (subnode) het gewisse voordele omdat \u2019n kleiner gebied wat deur die FKV-patogeen besmet kan word, beskikbaar is. Saailing-vestiging was beter \u2013 waarskynlik vanwe\u00eb die beskerming van die ho\u00ebr residuele ladings. <\/p>\n\n\n\n

\u201cDit dra by tot beter FKV-bestuur, \u2019n siekte wat gewoonlik vererger as \u2019n droogte uitbreek,\u201d s\u00ea Theron. <\/p>\n\n\n\n

Plant-residu ontbind vinniger hoe minder grond versteur word \u2013 vermoedelik weens beter mikrobiese aktiwiteit. Dit help ook om FKV-vlakke te verlaag.<\/p>\n\n\n\n

\u201cWisselbou bepaal die soort residu teenwoordig in \u2019n koringland, terwyl die bewerking die verspreiding en lading daarvan bepaal,\u201d verduidelik hy.<\/p>\n\n\n\n

Sommige van sy bevindings is in die vaktydskrifte Crop Protection <\/span>en South African Journal of Plant and Soil<\/span> gepubliseer. Sy studieleiers was prof. Pieter Swanepoel, voorsitter van die departement agronomie aan die Universiteit Stellenbosch, dr. Lindy Rose van die departement plantpatologie aan die US, en die produksiewetenskaplike dr. Gert van Coller van die direktoraat plantwetenskap van die Wes-Kaapse departement van landbou.<\/p>\n\n\n\n

Volgens Theron is die invloed van FKV in Australi\u00eb reeds teen 2009 op sowat 79 miljoen Australiese dollar per jaar bereken. \u201cDie uitwerking daarvan op die Suid-Afrikaanse koringbedryf is nog nie gekwantifiseer nie,\u201d s\u00ea hy.<\/p>\n\n\n\n

\n .<\/span> Theron het in Desember 2022 gegradueer en werk as \u2019n veld-landboukundige vir Adama Suid-Afrika in Kaapstad. Hy het in 2016 gematrikuleer aan Hugenote Ho\u00ebrskool in Wellington. Hy het \u2019n liefde vir boerdery ontwikkel tydens vele familiebesoeke aan sy oupa se plaas in die Vrystaat. Voordat hy die MSc-graad in agronomie behaal het, het hy \u2019n BScAgric in plantpatologie en agronomie ook aan die US behaal.<\/p>\n","protected":false},"excerpt":{"rendered":"

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help teen kroonvrot | Weslander<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/novanews.co.za\/weslander\/studie-help-teen-kroonvrot-20230222-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Studie help teen kroonvrot\" \/>\n<meta property=\"og:description\" content=\"Bewaringslandboubeginsels kan Fusarium-kroonvrot by koring help bestuur.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/novanews.co.za\/weslander\/studie-help-teen-kroonvrot-20230222-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Weslander\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/weslander\/\" \/>\n<meta property=\"article:published_time\" content=\"2023-02-27T04:01:15+00:00\" \/>\n<meta property=\"article:modified_time\" 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