蔬菜在其生长发育过程中需要大量的养分,为满足其需要往往要较多地施肥。下面就几种常用的施肥方法分析其利弊,以供参考。一、地面撒施蔬菜浇水后或下雨时趁墒将化肥撒施于畦面或植株行间。这种方法比较简单,省时省工,但肥料的利用率低,挥发会损失一部分肥分。特别是碳酸氢铵,挥发性极强,不提倡撒施;尿素、硫酸铵和硫酸钾可在田间操作不便、蔬菜急需肥的情况下撒施。撒施时不要撒在叶面上,以免烧伤叶片。二、随水冲施蔬菜在浇水前,将化肥撤在水沟内,使化肥随浇水溶化进入土壤。这种施肥方法,一方面会有部分挥发损失,另一方面会有部分随水渗漏到土壤深层,因蔬菜根系达不到而不能被吸收利用。其优点是方法简单,劳动量小。在大面积蔬菜严重缺肥而不便于埋施的情况下,可作为首选的追肥方法。冲施前 Vegetables require a lot of nutrients during their growth and development, and fertilizers tend to be more abundant to meet their needs. Here are some commonly used methods of fertilizer analysis of their pros and cons, for reference. First, the ground sprinkle with vegetables after watering or while taking advantage of moisture fertilizers sprinkled on the noodles or plant lines. This method is relatively simple, save time and labor, but the low utilization of fertilizer, volatile loss of part of the fertilizer. In particular, ammonium bicarbonate, highly volatile, does not advocate spreading; urea, ammonium sulfate and potassium sulfate in the field inconvenient to operate, the case of vegetables in urgent need of fat spread. Do not sprinkle on the leaves when spreading, so as not to burn the leaves. Second, with the water Chongshizu vegetables before watering, the fertilizer will be withdrawn in the ditch, so that fertilizer with watermelon dissolved into the soil. This fertilization method, on the one hand there will be some volatile loss, on the other hand there will be some with the water seepage into the soil deep, due to vegetable roots can not be absorbed and utilized. The advantage is that the method is simple, small amount of labor. Serious lack of vegetables in a large area of ​​vegetables is not easy to embed the case, can be used as the preferred method of dressing. Chong Shi before