氮、磷和钾肥施用量对有机生态型无土栽培温室黄瓜产量影响的研究

Study on Effect of N,P and K on Greenhouse Cucumber Yield of Eco-organic Soilless Culture

采用二次回归饱和D-最优试验设计方法研究了固态N、P和K肥施用量对日光温室有机生态型无土栽培春茬黄瓜产量的影响，建立了N、P和K肥施用量与早、中、后期黄瓜产量形成之间的数学模型。试验结果表明：N、P及K对黄瓜的早期产量影响极显著，产量区间为2400--3260g／小区的最佳施肥量（单位：g／株／次）为N0．33，P2O50．37。K2O 0．86；P、K是影响黄瓜中期产量的主要因素，产量区间为6400～9200g／小区的最佳施肥量分别为N0．66，P2050．33。K200．90；黄瓜生长后期，N肥对黄瓜产量的影响极其显著。产量区间为2C00～2940g／小区的最佳施肥量为N0．61，P2O50．40，K2O0．94。

Adopted twice saturated reqression and D- optimal design to stady the effect of nutrient N, I and K on cucumber yield by directly supplying solid N .P and K fertilizer （mixture of . organic and inorganic fertilizers） in eco - organic type soilless culture system. The maths models between fertilization rate and yield was established. The results indicated that N, P and K nutrient had significant effect on cucumber early yield. The optimum fertilization rate of of N, P and K were 0.83 （unit：g/plant/time,the same as follows）, 0.37 and 0.86 respectively durirg early growing stage ： P and K had significant effect on cucumber middle yield,the optimum fertilization rate of of N, P and K were 0.66,0.33 and 0.90 respectively during middle growing stage; N had significant effect on cucumber late yield. The optimum fertilization rate of of N, P and K were 0.61,0.40 and 0.94 respectively during late growing stage.