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磷镁营养互作对甘蔗生长状况的影响

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本研究通过采用盆栽沙培试验对磷镁互作条件下甘蔗的生长效应进行探讨,供试品种为ROC22和粤糖00—236。结果表明:施磷能够明显地促进2种基因型甘蔗的生长和生物量的积累,适当施镁能促进甘蔗生长和生物量的积累,但不同的品种之间存在差异。2个品种的根冠比都随供磷水平的升高呈降低趋势;镁能提高植株根冠比,但供镁过多会对甘蔗根系生长产生抑制作用。磷镁互作过程中,磷属于主效应,镁属于副效应。即2者比较而言,磷素对甘蔗生长效应要大于镁素。适当增施镁能提高甘蔗的生物量。
Effect of Interaction of Phosphorus and Magnesium on Sugarcane Growth
Under a pot-sand-culture test with varieties including ROC22 and TSC00-236, this study probes into the growth of sugarcane in terms of interaction of phosphorus and magnesium. It showed from the experiment that: phosphorus promotes significantly the accumulation of growth and biomass of two genotypes of sugarcane, while certain amount of magnesium facilitates the sugarcane accumulation growth and biomass. However, differences still exist between the two species. Root-shoot ratios of both the two varieties show a decreasing trend with the growth of phosphorus. Magnesium can increase plant's root-shoot ratio, but too much of it inhibits sugarcane's root growth. In the interaction of phosphorus and Magnesium, phosphorus is the main effect while magnesium is an aftereffect. In other words, the effect of phosphorus on the growth of sugarcane is more obvious than that of magnesium. Appropriate fertilization of magnesium helps increase output of sugarcane.

SugarcaneInteraction of phosphorus and magnesiumGrowth effect

郑超、李奇伟、黄振瑞、敖俊华、廖宗文、谭中文

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广东海洋大学农学院,广东湛江524088

广州甘蔗糖业科学研究所,广东广州510316

华南农业大学资源与环境学院,广东广州510642

华南农业大学农学院,广东广州510642

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甘蔗 磷镁互作 生长效应

现代农业产业技术体系建设专项

2011

甘蔗糖业
中国糖协,全国甘蔗糖业信息中心

甘蔗糖业

CSTPCD
影响因子:0.548
ISSN:1005-9695
年,卷(期):2011.(4)
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