叶面喷施腐植酸可使地表灌溉小麦的底肥量降到最低

Humic Acid Foliar Application to Minimize Soil Applied Fertilization of Surface-irrigated Wheat

2006/2007年和2007/2008年连续两个冬天在埃及的Khanater,Khairia,Kaliobia三个省的淤泥土上对小麦Giza168进行两组现场试验,用以研究已商业生产的含N,P,K(10%,10%,10%)2.9%的叶面喷施型腐植酸对小麦在养分吸收和产量构成因素方面的影响。配合不同的氮磷钾比例(推荐用量的0,25%,50%,75%和100%),腐植酸的用量分别为0、2.5cm/L、5cm/L、7.5cm/L和10cm/L。研究数据显示:施用50%的氮磷钾肥料加5cm/L的腐植酸用于叶面喷施可增加氮、磷、钾、钙和镁的吸收,可导致粒长、粒重和产量(kg/fed)增加,而且麦秆产量和生物学产量是最高的。同时,施用25%的氮磷钾肥料加7.5cm/L的腐植酸用于叶面喷施可增加锰、锌和铜的吸收。上述结果表明,增加氮、磷、钾、钙、镁、铁、锰、锌和铜等营养元素的吸收可导致产量构成因素增加。

Two field experiments were conducted at E1-Khanater, E1-Khairia, E1-Kaliobia Governorate, Egypt on silty clay soil during two winter successive seasons 2006/2007 and 2007/2008,using wheat plants(Triticum aestivum L.cv. Giza 168), to study the effect of foliar spray of commercially produced humic acid 2.9%, containing N, P, K(10%, 10%, 10%)used at 0, 2.5 cm/L, 5 cm/L, 7.5 cm/L, 10 cm/L concentrations on wheat plants fertilized with different rates of N, P, K (0, 25%, 50%, 75% and 100% of recommended dosage) ...