马铃薯氮磷钾“3414”试验研究

Study on 3414 experiment applying nitrogen,phosphorus and potassium to potato

2011年引进马铃薯兴佳2号在连江县敖江流域进行氮磷钾效应试验,结果表明:施用氮肥的效应最好,增产65.3%,磷肥和钾肥分别增产17.3%、19.7%。采用二次多项式逐步回归的方法建立肥料效应回归模型,求解得出在横槎、宝溪等区域种植马铃薯最佳经济产量施肥量,每667 m2施N分别为14.0 kg、18.0 kg,P2O5分别为11.5 kg、9.0 kg,K2O分别为18.0 kg、15.5kg,最佳经济效益分别为3333.67元、3340.13元。

Efficient experiment of applying nitrogen, phosphorus and potassium to introduced potato ＂Xingjia 2＂ were carried out in Aojiang Basin of Lianjiang County in 2011. The results showed that applying nitrogen fertilizer had the best effect and could increase the yield by 65.3%, and applying phosphorus and potassium could increase the yield by 17.3% and 19.7% respectively. In this paper, fertilizer effect regression model was estab]isbed by using the quadratic polynomial stepwise re- gression, the fertilizing quantity for the optimum economic and the optimum economic benefit of planting potato in Hengcha and Baoxi were obtained as follows： N 14.0 kg/667 m2 and 18.0 kg/667 m2（ 172.5 kg/hm2 and 270 kg/hm2）, P205 11.5 kg/667 m2 and 9.0 kg/667 m2 （210 kg/hm2 and 135 kg/hm2） , K20 18.0 kg/667 m2 and 15.5 kg/667 m2（ 270 kg/hm2 and 232.5 kg/hm2）, and the optimum economic benefit 3333.67 yuan/667 m2 and 3340. 13 yuan/667 m2 （50005.05 yuan/hm2 and 50101.95 yuan/hm2 ） respectively.