基于氮钾二因子饱和D最优设计的迁葫1号施肥效果研究  

Study on Optimal Application Rate of Nitrogen and Potassium Fertilizer for Cucubita pepo “Qianhu 1” Based on Saturated D-optimal Design

作　　者：周玲玲[1] 张黎杰[1] 余翔[1] 姜若勇[1] 田福发[1] 王夏雯[1] 吴绍军[1] 孟佳丽[1] ZHOU Ling-ling;ZHANG Li-jie;YU Xiang;JIANG Ruo-yong;TIAN Fu-fa;WANG Xia-wen;WU Shao-jun;MENG Jia-li(Institute of Suqian, Jiangsu Academy of Agricultural Sciences, Suqian 223800, China)

机构地区：[1]江苏省农业科学院宿迁农科所,江苏宿迁223800

出　　处：《江西农业学报》2019年第4期51-55,共5页Acta Agriculturae Jiangxi

基　　金：江苏省宿迁市农业科技支撑项目(L201603);江苏省333工程"西葫芦优异种质资源筛选与创制利用

摘　　要：以迁葫1号西葫芦为研究对象,采用氮钾二因子饱和D最优设计,研究了不同氮钾肥料施用量对西葫芦产量品质的影响,建立了产量和品质的回归模型,以明确迁葫1号的最优施肥方案。结果表明:增施氮肥更有利于西葫芦产量的提高,钾素施用量的大小是影响西葫芦品质指标的主要因素;N、K_2O对西葫芦产量和品质的互作效应明显;通过效应函数的频率分析寻优可知,当西葫芦目标产量超过5300 kg/667 m^2、置信区间为95%时,氮钾肥料优化施肥量为施氮24.13～43.30 kg/667 m^2、施钾24.68～63.20 kg/667 m^2;利用回归分析软件求得方程最优解,施氮32.73 kg/667 m^2、施钾40 kg/667 m^2,产量最高,为5504.55/667 m^2;当品质得分超过70分、置信区间为95%时,优化施肥量为施氮6.70～39.92 kg/667 m^2、施钾36.71～56.81 kg/667 m^2;利用回归分析软件求得方程最优解,施氮16.36 kg/667 m^2、施钾47.64 kg/667 m^2,品质得分最高,为75.70分。The pumpkin(Cucubita pepo L.) variety "Qianhu 1" was taken as the research object, the two-factor saturated D-optimal design was adopted to study the impacts of different application rates of nitrogen and potassium fertilizer on the yield and quality of pumpkin, and the regression models of pumpkin yield and quality were established to ascertain the optimal fertilization scheme for "Qianhu 1". The results showed that: the increase in nitrogen fertilizer application rate was more beneficial to the improvement of pumpkin yield, and the application rate of potassium fertilizer was the main factor affecting the quality indexes of pumpkin;the interaction effect of N and K2O on the yield and quality of pumpkin was obvious. The optimization results obtained by the frequency analysis of effect functions indicated that: when the target yield of pumpkin exceeded 5300.00 kg/667 m^2, the optimal application rate of nitrogen and potassium fertilizer was 24.13~43.30 and 24.68~63.20 kg/667 m^2(95% confidence interval), respectively. By using regression analysis software, the optimal solutions of yield and quality regression equations were obtained as follows: when 32.73 kg/667 m^2 nitrogen and 40.00 kg/667 m^2 potassium were applied, the pumpkin yield was the highest(5504.55/667 m^2);when the quality score of pumpkin was more than 70.00, the optimized application rate of nitrogen and potassium fertilizer was 6.70~39.92 and 36.71~56.81 kg/667 m^2(95% confidence interval), respectively;when 16.36 kg/667 m^2 nitrogen and 47.64 kg/667 m^2 potassium were applied, the pumpkin quality had the highest score(75.70).

关 键 词：西葫芦 饱和D最优设计 氮钾肥料 施用量 

分 类 号：S646.9[农业科学—蔬菜学]