不同供氮水平下火龙果果实发育模拟研究  

Simulation Study on Fruit Development of Hylocereus polyrhizus under Different Nitrogen Level

作　　者：李莉婕[1] 孙长青 黎瑞君 岳延滨[1] 聂克艳[1] 冯恩英 彭顺正 赵泽英[1] LI Lijie;SUN Changqing;LI Ruijun;YUE Yanbin;NIE Keyan;FENG Enying;PENG Shunzheng;ZHAO Zeying(Institute of Agricultural Science and Technology Information,Guizhou Academy of Agricultural Sciences,Guiyang,Guizhou 550006,China)

机构地区：[1]贵州省农业科学院科技信息研究所,贵州贵阳550006

出　　处：《贵州农业科学》2021年第12期132-139,共8页Guizhou Agricultural Sciences

基　　金：国家自然科学基金项目“水分胁迫下火龙果茎枝生长模拟研究”(31460319);贵州省科研机构创新能力建设专项资金“精品水果果园数字化管理创新平台建设”[黔科合服企(2021)15];贵州省2020年度科技支撑计划项目“基于物联网的火龙果提质增效关键技术研究”[黔科合支撑(2020)1Y019]。

摘　　要：【目的】探明火龙果果实生长发育规律,为火龙果产业调控提供技术支撑。【方法】以3年生火龙果品种紫红龙为研究对象,设置4个氮素供应水平(N_(1):0.0 g/桩、N_(2):90 g/桩、N_(3):180 g/桩和N_(4):270 g/桩),采用Logistic方程对不同供氮水平下火龙果果实纵横径与生理发育时间(Physiological development time,PDT)的动态变化进行定量分析,构建火龙果果实几何属性模型,量化模型参数与茎氮水平的定量关系,明确火龙果果实纵横径关系及果实鲜重与体积的关系,构建基于生物量的火龙果果实生长发育模型。【结果】1)建立了火龙果果实纵(PFFL)和横径(PFFW)与生理发育时间(PDT)的动态模型:PFFL=PFFL_(max)/1+a_(1)×e^(-b_(1)×(PDT-INiPDT)),PFFW=PFFW_(max)/1+a_(1)×e^(-b_(2)×(PDT-INiPDT))(b_(1)、b_(2)为火龙果果实纵径和横径相对增长速率,a_(1)、a_(2)为模型参数),PFFL_(max)(最大纵径)和PFFW_(max)(最大横径)与茎氮水平呈线性正相关,模型参数a_(1)和a_(2)随茎氮水平增加呈二次曲线变化;火龙果果实纵径和横径的关系可用幂指数方程表达,果实鲜重与体积的关系可用线性方程表达。2)建立了火龙果果实发育模型:NW=K×M×4/3×π×PFFL/2×(PFFW/2)^(2)(NW为果实鲜重,M为模型参数,K为校正系数)。模型检验结果表明:果实纵径、横径和单果重的根均方差(Root Mean Square Error,RMSE)较小,分别为4.2 mm、3.0 mm和14.10 g,模拟效果较好。【结论】模型能够较好地模拟不同氮素水平下火龙果果实的生长发育,为火龙果功能-结构模型的构建奠定基础。【Objective】The fruit growth and development regulation of Hylocereus polyrhizus is discussed to provide the technical support for regulation and control of H.polyrhizus industry.【Method】The dynamic changes between fruit longitudinal diameter,transverse diameter and physiological development time(PDT)under 4 nitrogen levels(N_(1):0.0 g/pile,N_(2):90 g/pile,N_(3):180 g/pile and N_(4):270 g/pile)are quantitatively analyzed by using Logistic equation and taking H.polyrhizus with three years old as the research sample.The fruit geometric attribute model is structured.The quantitative relationship between the model parameters and the stem nitrogen level is quantified.The relationships between fruit longitudinal diameter and transverse diameter and between fresh fruit weight and volume are explicated.The fruit growth and development model of H.polyrhizus is built based on biomass.【Result】1)The dynamic models(PFFL=PFFL_(max)/1+a_(1)×e^(-b_(1)×(PDT-INiPDT))and PFFW=PFFW_(max)/1+a_(1)×e^(-b_(2)×(PDT-INiPDT)))of fruit longitudinal diameter(PFFL)and transverse diameter(PFFW)with physiological development time(PDT)are built(b_(1),relative growth speed rate of longitudinal diameter;b_(2),relative growth speed rate of transverse diameter;a_(1) and a_(2),model parameter).PFFL_(max)(maximum longitudinal diameter)and PFFW_(max)(maximum transverse diameter)are positively related to the stem nitrogen level.The model parameters of a_(1) and a_(2) show a quadratic curve with increase of the stem nitrogen level.The relationship between fruit longitudinal diameter and transverse diameter can be expressed by a power exponent equation.The relationship between fresh fruit weight and volume can be expressed by a linear equation.2)The fruit development model of NW=K×M×43×π×PFFL 2×(PFFW 2)2(NW,fresh fruit weight;M,model parameter;K,correction coefficient)is built.The mode test shows that the root mean square error(RMSE)of fruit longitudinal diameter,transverse diameter and single fruit weight only is 4.2 mm,3.0 mm and 14

关 键 词：火龙果 果实发育 纵横径 氮 模型 

分 类 号：S668.9[农业科学—果树学]