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首页> 外文期刊>African Journal of Biotechnology >Reduced dosages of atrazine and narrow rows can provide adequate weed control in smallholder irrigated maize (Zea mays L.) production in South Africa
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Reduced dosages of atrazine and narrow rows can provide adequate weed control in smallholder irrigated maize (Zea mays L.) production in South Africa

机译：减少at去津和窄行的剂量可以为南非小农户灌溉玉米（Zea mays L.）的生产提供足够的杂草控制

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An on-farm experiment was conducted in Zanyokwe irrigation scheme to investigate the effects of row spacing (45 and 90 cm) and atrazine dosage (33, 67 and 100% of the label recommended dosage) on weed density and biomass and on maize yield. Overall percent kill of weeds increased with increase in atrazine dosage and with reduction in row spacing. Percent kill varied according to weed species with a 100% kill of broad leaf weeds such as?Amaranthus hybridus,Nicandra physaloides?and?Bidens pilosa?regardless of herbicide dosage whileDigitaria sanguinalis,?Cyperus esculentus, Cynodon dactylon and Oxalis latifoliacould not be controlled even at the LRD. Weed density at maize physiological maturity decreased by 11% when row spacing was decreased from 90 to 45 cm. Atrazine dosage and row spacing did not have significant interactive effects and their main effects did not significantly affect weight of green cobs, cob length or grain yield. The study demonstrated the possibility of incorporation of reduced herbicide dosages and narrow rows to achieve adequate weed control and optimise on yields in smallholder farming systems.
机译：在Zanyokwe灌溉方案中进行了农场试验，研究行距（45和90 cm）和and去津剂量（标签推荐剂量的33％，67％和100％）对杂草密度和生物量以及玉米产量的影响。杂草的总杀灭百分数随阿特拉津用量的增加和行间距的减小而增加。杀灭百分率随杂草种类的不同而不同，无论除草剂的使用量如何，杀灭A菜，Nicandra physaloides和Bidens pilosa的阔叶杂草均被100％杀灭，而Digitaria sanguinalis，Cyperus esculentus，Cynodon dactylon和Oxalis latifoliacoaco甚至无法控制。在LRD。当行距从90 cm减少到45 cm时，玉米生理成熟时的杂草密度降低了11％。阿特拉津的剂量和行距没有显着的交互作用，并且它们的主要作用没有显着影响生胚轴的重量，穗轴的长度或谷物的产量。该研究表明，在小农户耕作制度中，可以采用减少除草剂用量和窄行混合以达到适当的杂草控制并优化单产的可能性。

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