作物生长发育,不仅需要各种大量元素,而且还需要有铁、铜、锰、硼、锌、钼、氯等微量元素。微量元素主要来源于土壤矿物,含量十分有限。据试验,在小麦孕穗期喷施多元微肥,无论在株高、穗长、穗粒数和千粒重都比对照有较显著提高。一般可亩增小麦25公斤,增产8.7％。方法是:亩用微肥100克,先溶于少量温水后再兑清水50公斤叶面喷洒。其 Crop growth and development, not only need a variety of large elements, but also need iron, copper, manganese, boron, zinc, molybdenum, chlorine and other trace elements. Trace elements mainly come from soil minerals, the content is very limited. According to the experiment, spraying micronutrients at the booting stage of wheat significantly increased compared with the control, regardless of plant height, spike length, number of grains per spike and grain weight of 1000. May generally increase acres of wheat 25 kg, an increase of 8.7%. Method is: mu with 100 grams of fertilizer, soluble in a small amount of warm water and then against the water 50 kg foliar spray. its