赤红壤施用中、微量元素肥料对甘蔗产量与糖分的影响

在砂页岩发育的赤红壤上种植甘蔗新台糖22号,经过单施或配施中、微量元素Ca、Mg、B、Mo、Cu、Zn、Fe肥,结果表明:单施Ca、Mg、B、Mo肥对甘蔗具有显著增产效果且经济效益较好,而施Fe、Zn肥有负效应;施B、Mo、Mg、Cu肥能显著提高甘蔗含糖量,而Fe、Zn肥呈负效应。B、Mo、Mg、Ca 4种肥料相互配施的增产或增糖效应不优于单施的效应。因此,在砂页岩发育的赤红壤上种植甘蔗,建议单独施用B、Mg、Mo、Ca肥,减少生产成本。

Effect of medium and micro elements fertilizers on the yield and sugar of sugarcane in latosolic red soil

The tested sugarcane variety ROC22 were planted in latosolic red soil developed from sand shale,and medium and micro elements of Ca,Mg,B,Mo,Cu,Zn and Fe were alone or combinedly applied in the soil.The results showed that single application of Ca,Mg,B and Mo fertilizer showed obvious effect on increasing the yield of sugarcane with a better economic benefit,while Fe and Zn fertilizers showed negative effect.The effect of combined application of B,Mo,Mg and Ca each other on increasing the yield or sugar content of sugarcane was not better than that of single application of them.Therefore,it suggested that B,Mo,Mg and Ca fertilizer should be applied alone in sugarcane in latosolic red soil to decrease the cost of production.