CAJ | 학술논문

以炸条型马铃薯品种‘抗疫白’（Kennebec）为供试材料，设计6个施氮水平，通过田间小区试验，研究不同施氮量对马铃薯产量和叶面积指数的影响。施氮量与马铃薯产量的关系用二次函数拟合效果良好，方程为y=-0.0012x2+0.3717x+18.6720，对方程求导，当施氮量达到154.8 kg/hm2时产量达到了最大值47.5 t/hm2。不同时期的叶面积指数与产量的关系用二次方程拟合效果良好，对方程求导，获得的叶面积指数适宜的范围，出苗后20，30，40，50，60，70，80和90 d的叶面积指数依次为2.35~2.62,2.84~3.20,4.19~4.66,5.23~5.60,4.31~5.04,4.29~4.96,3.53~4.10和2.78~3.42。
이작조형마령서품충‘항역백’（Kennebec）위공시재료，설계6개시담수평，통과전간소구시험，연구불동시담량대마령서산량화협면적지수적영향。시담량여마령서산량적관계용이차함수의합효과량호，방정위y=-0.0012x2+0.3717x+18.6720，대방정구도，당시담량체도154.8 kg/hm2시산량체도료최대치47.5 t/hm2。불동시기적협면적지수여산량적관계용이차방정의합효과량호，대방정구도，획득적협면적지수괄의적범위，출묘후20，30，40，50，60，70，80화90 d적협면적지수의차위2.35~2.62,2.84~3.20,4.19~4.66,5.23~5.60,4.31~5.04,4.29~4.96,3.53~4.10화2.78~3.42。
French fry potato 'Kennebec' was fertilized at six nitrogen rates in a plot experiment, and the effects of different nitrogen rates on potato yield and leaf area index were studied. With the increase of nitrogen rate, the yield of 'Kennebec' increased at first and then decreased, and the relation of nitrogen rate and potato tuber yield could be described by a quadratic function, y=-0.0012x2+0.3717x+18.6720. The yield of 'Kennebec' reached 47.5 t/ha of maximum value, when the nitrogen rate was at 154.8 kg/ha. The relation of leaf area index and potato tuber yield could also be described by quadratic function, with the optimal ranges of leaf area index were 2.35-2.62, 2.84-3.20, 4.19-4.66, 5.23-5.60, 4.31-5.04, 4.29-4.96, 3.53-4.10 and 2.78-3.42 for 20, 30, 40, 50, 60, 70, 80 and 90 days after the emergence, respectively.