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肥料利用效率低是制约我国作物产量提高的重要因素。为了研究提高肥料利用效率的新方法,将有机水溶性肥以叶面喷施和灌根的方式与无机肥配合施用,探讨其对大白菜产量、品质和养分利用率的影响。结果表明,有机水溶性肥以叶面喷施和灌根的方式与无机肥配施时,比无机肥单施大白菜产量分别提高了7.3%和18.8%,包心率分别增加7.2%和4.7%,有机水溶性肥灌根增产效果明显优于其叶面喷施;有机水溶性肥以叶面喷施和灌根的方式与无机肥配施比单施无机肥硝酸盐分别降低14.2%和12.7%,VC增加均不显著;有机水溶性肥以叶面喷施和灌根的方式与无机肥配施比单施无机肥氮、磷、钾肥利用率分别提高了12.1%、6.4%、3.4%和18.6%、16.2%、12.9%;有机水溶性肥以叶面喷施和灌根的方式与无机肥配施时,其投入产出比分别为6.4、16.6,有机水溶性肥灌根经济效益高于其叶面喷施。
Low efficiency of fertilizer utilization is an important factor restricting the increase of crop yield in our country. In order to study a new method to improve the efficiency of fertilizer use, the organic water-soluble fertilizer is applied in combination with inorganic fertilizer on foliar spray and rooting to explore its effect on yield, quality and nutrient utilization of Chinese cabbage. The results showed that the yield of Chinese cabbage increased by 7.3% and 18.8% compared with that of inorganic fertilizer when the organic water-soluble fertilizer was combined with inorganic fertilizer by foliar application and irrigation. The heart rate increased by 7.2% and 4.7% , Organic water-soluble fertilizer irrigation effect was significantly better than its foliar spray; organic water-soluble fertilizer foliar spray and irrigation methods and inorganic fertilizer than the single application of inorganic nitrate decreased by 14.2% and 12.7 %, VC increased not significantly; organic water-soluble fertilizer by foliar spray and root irrigation and inorganic fertilizer than single application of inorganic fertilizer nitrogen, phosphorus and potassium utilization increased by 12.1%, 6.4%, 3.4% And 18.6%, 16.2% and 12.9%, respectively. The input-output ratio of organic water-soluble fertilizer to foliar application and inorganic fertilizers were 6.4,16.6 and economic benefits of organic water-soluble fertilizer Spraying above its foliage.