喷施微肥对苜蓿微量元素含量及积累量的影响

Effect of spraying mixed trace elements on trace element content and accumulating quantity of Medicago sativa

在氮磷钾基肥供应足量的基础上,采用叶面喷施的方法,研究Zn、Fe、Mo、Co、B、Cu、Se和Mn 8种微肥混合喷施对紫花苜蓿微量元素营养的影响。结果表明,喷施微肥能促进苜蓿Zn、Fe、Mo、Co、B、Cu、Se和Mn的含量及积累量的增长,且恰当的组配微肥中Mo和Co含量,如本试验的高钼低钴处理,能显著促进苜蓿8种微量元素的含量及积累量的同时增长(P<0.05)。

Based on a regime of ample N, P, K fertilizer, the effect of 8 kinds of trace element fertilizers （Zn, Fe, Mo, Co, B, Cu, Se, Mn）with mixed spraying on trace element nutrition of Medicago sativa was investigated by spraying leaf surfaces. Spraying a mixture of trace elements increased the content and accumulating quantity of Zn, Fe, Mo, Co, B, Cu, Se, Mn. An optimal combination of mixed trace elements could considerably enhance the content and accumulating quantity of these eight elements（P〈0.01）. For example, there was a high Mo and low Co treatment in the experimental design.