氮磷钾不同配比对青花菜经济性状的影响

Effects of Different Combination of N,P,K on Broccoli Fertilizer Trial

在潮土土壤上,对青花菜进行了施用不同配比氮磷钾肥的试验。试验结果表明,本地栽培青花菜,增氮可使青花菜植株开展度、高度增加,增磷、增钾则变化不大。在常规施肥条件下,增N有明显的增产作用,增减P,K对产量影响不大。具体施肥方法:在移栽前,距定植穴10cm处开沟,1hm2施入过磷酸钙795kg加尿素300kg加氯化钾150kg。追肥分2次进行,第1次在发棵期,1hm2浇施尿素120kg,第2次在30%植株花球形成时,打孔深施尿素180kg加氯化钾150kg。

On the tidal soil in Zhejiang Cixi, fertilizer trail of the broccoli was tested. The results showed that nitrogen can highly increase the width and the height of plant, but phosphorus and potassium did not. Under the conditions of conventional fertilization, N significantly increase production, but P and K increase or decrease little. The fertilizer should be applied as following. Before the transplanting, ditch 10 cm beside the hole, 795 kg calcium superphosphorate and 300 kg of urea and 150 kg potassium chloride should be applied per 1 hm^2. Topdressing should be made at two times. In the first period,seedling atage, 120 kg urea should be applied directly into soil per 1 hm^2 the second period, 30% of plants beginning to form curd 180 kg urea and 150 kg potassium chloride should be applied into deep soil.