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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 trials of wheat Giza 168 on silt in three provinces of Khanater, Khairia, Kaliobia, Egypt in 2006/2007 and 2007/2008 for two consecutive winters were conducted to study the commercial production of N, P, K (10%, 10%, 10%) 2.9% foliar spray humic acid on nutrient absorption and yield components of wheat. With the different ratios of NPK (0, 25%, 50%, 75% and 100%), the amounts of humic acid were 0,2.5cm / L, 5cm / L, 7.5cm / L and 10cm / L. The results showed that application of 50% N, P and K fertilizers plus 5 cm / L humic acid for foliar application increased N, P, K, Ca and Mg uptake and resulted in grain length, grain weight and yield (kg / fed) increased, and the straw yield and biological yield is the highest. At the same time, applying 25% nitrogen, phosphorus and potassium fertilizers plus 7.5 cm / L humic acid for foliar application increased the absorption of manganese, zinc and copper. The above results show that increasing the absorption of nitrogen, phosphorus, potassium, calcium, magnesium, iron, manganese, zinc and copper and other nutrients can lead to the increase of yield components.