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当前位置: 首页 > 文章 > 水培生菜氮磷钾产量模型的构建与分析 北方园艺 2016 (14) 11-16
Position: Home > Articles > Construction and Analysis of Hydroponic Lettuce Production Model Basing on NPK Concentration Northern Horticulture 2016 (14) 11-16

水培生菜氮磷钾产量模型的构建与分析

作  者：
张栋;胡笑涛;王文娥;苏苑君;乔源;王瑞
单  位：
西北农林科技大学旱区农业水土工程教育部重点实验室
关键词：
水培生菜;氮磷钾;产量;数学模型
摘  要：
为定量揭示水培生菜产量对营养液主要营养元素氮磷钾浓度的关系,以香港"玻璃脆"散叶生菜为试材,设置不同氮磷钾营养液配方,采用三因素(N、P、K)五水平二次通用旋转组合设计试验,分析了水培生菜在前、后期氮磷钾对产量的影响,建立了生菜产量对三因素的回归数学模型。结果表明:前期三因素对产量的影响顺序是N>K>P,后期为N>P>K;各因素间存在着交互作用,营养液中氮离子浓度和钾离子浓度均呈正相关,磷离子与钾离子浓度均呈负相关;在生长前期,当氮磷钾浓度分别为8.46、0.62、2.57mmol·L~(-1)时,产量最高为12.26g·株~(-1);在生长后期,当氮磷钾浓度分别为4.65、0.69、2.43mmol·L~(-1)时,产量最大为88.27g·株~(-1)。
译  名：
Construction and Analysis of Hydroponic Lettuce Production Model Basing on NPK Concentration
作  者：
ZHANG Dong;HU Xiaotao;WANG Wen'e;SU Yuanjun;QIAO Yuan;WANG Rui;Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas,Ministry of Education,Northwest Agriculture and Forestry University;China Electric Power Construction Guiyang Survey and Design Research Institute Co.Ltd.;
关键词：
hydroponic lettuce;;N,P,K;;yield;;mathematical model
摘  要：
For quantitative reveal the relationship between hydroponic lettuce yield and major nutrient elements(N,P,K)in nutrient solution,leaf lettuce of Hong Kong‘Bolicui'was used as test materials,hydroponic formula of different N,P,K were set,the three factors(N,P,K)five levels quadratic general rotary unitized experiment was adopted to analysis the affect to hydroponic lettuce yield.Lettuce yield regression mathematical model of three factors was established.The results showed that under the test conditions,in the early,the sequence of three factors on the yield was N>K>P;in the late,the sequence of three factors on the yield was N>P>K.The interaction between various factors,there was a positive correlation between the nitrogen ion concentration and potassium ion concentration,there was a negative correlation between the phosphorus ion concentration and potassium ion concentration.At the early stage of the growth,when the concentration of NPK for 8.46mmol·L~(-1),0.62mmol·L~(-1),2.57mmol·L~(-1) respectively,the highest yield per plant was 12.26 g.At the late stage of the growth,when the concentration of N,P,K for 4.65mmol·L~(-1),0.69mmol·L~(-1),2.43mmol·L~(-1) respectively,the highest yield per plant was 88.27 g.

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