洋葱产量与不同施肥水平的效应研究

采用农业部规定的＂测土配方施肥技术规范中的3414试验方案＂,在通海县杨广镇进行了洋葱氮、磷、钾配方施肥效应试验,基于试验观测数据,建立洋葱氮、磷、钾施肥量与产量单因子和多因子效应回归模型。结果表明,N、P2O5、K2O施用量分别为458.25 kg·hm^-2-485.85 kg·hm^-2、337.5 kg·hm^-2-455.53 kg·hm^-2和0 kg·hm^-2时,洋葱最高经济产量可达84914.1 kg·hm^-2。在前作为烤烟的土壤条件下,适当增施磷肥,不施钾肥即可获得最佳产量和经济效益,在实际生产中应遵循＂稳氮、增磷、控钾＂的施肥原则进行配方施肥。图4,表3,参14。

Study on the Effect of Different Fertilizing Level on Onion Yield

Based on the "3414"fertilizer experiment by soil testing and fertilization recommendation project,the effects of N,P and K fertilizer on onion were studied in Yangguang town,Tonghai County.The regression models of the three factors and yield of onion were established.The experiments find that the maximum economic yield of onion is up to 84914.1 kg·hm-2 when the fertilizer amount of N,P2O5 and K2O in each hectare are 458.25 kg·hm-2~485.85 kg·hm-2,337.5 kg·hm-2~455.53 kg·hm-2 and 0 kg·hm-2 respectively.Under the same typical of soil conditions,the optimal yield and economic benefits will be obtained by increasing P fertilizer properly,and not fertilizing K fertilizer.Moreover,the principles of "stable N,increasing P and controlling K" should be followed in practical production.