微量元素在甘蔗分蘖时以叶面喷洒的方式施用,锌可使每公顷获得最大的产糖量,铜、硼和锰也使产糖量比对照增加,而铁和钼则降低产糖量。当微量元素在甘蔗伸长时施用,则铜使产糖量最高,依次为钼、锌、锰和铁,硼则使产糖量比对照降低。还研究了微量元素对蔗汁的成分和澄清的影响。 Trace elements were applied foliarly when tillering sugarcane. Zinc maximized the yield of sugar per hectare. Copper, boron and manganese also increased the sugar yield compared with the control, while iron and molybdenum reduced the amount of sugar produced. When trace elements were applied during elongation of sugarcane, copper produced the highest amounts of sugar, followed by molybdenum, zinc, manganese and iron, while boron reduced the amount of sugar produced. The effects of trace elements on the composition and clarification of cane juice were also studied.