一般说来,同科蔬菜不宜连作,原因有二: 其一,同科蔬菜对养分的吸收和需求基本一致,连作会导致消耗土壤中相同的养料而引起缺素症,严重影响蔬菜的产量和品质。例如豆科蔬菜,因为具有根瘤固氮能力,一般氮素肥料的消耗量就不及瓜果类蔬菜,而由于根瘤菌需要磷,因而磷素肥料的消耗量 In general, the same section of vegetables should not be interdependent, for two reasons: First, the same section of vegetables on the nutrient absorption and demand are basically the same, even as the result will lead to consumption of the same nutrients in the soil caused by deficiency, seriously affecting the yield of vegetables and quality. For example, leguminous vegetables, because of nodulation of nitrogen fixation capacity, the general consumption of nitrogen fertilizer less than fruits and vegetables, and due to rhizobia need phosphorus, and thus the consumption of phosphorus fertilizer