基于辐热积的日光温室嫁接茄子养分积累模型

Nutrient Accumulation Model of Grafted Eggplant in Solar Greenhouse Based on Product of Thermal Effectiveness and Photosynthesis Active Radiation

以茄杂2号为试材,采用嫁接栽培,分析5个施氮水平下茄子全株及茎、叶片、果实养分积累量的动态变化,建立了基于辐热积的日光温室嫁接茄子养分积累模拟模型,并对模型进行了验证。结果表明,该模型可以利用辐热积比较准确地模拟出不同施氮水平茄子养分积累量,以产量最高的F3处理作为参照,其植株N、P、K积累量的标准误差RMSE和1∶1直线决定系数R^(2)分别为4.88 kg·hm^(-2)和0.9968、0.53 kg·hm^(-2)和0.9983、7.85 kg·hm^(-2)和0.9971;茎中N、P、K积累量的标准误差RMSE和1∶1直线决定系数R^(2)分别为1.66 kg·hm^(-2)和0.9576、0.59 kg·hm^(-2)和0.9561、3.89 kg·hm^(-2)和0.9820;叶片中N、P、K积累量的标准误差RMSE和1∶1直线决定系数R^(2)分别为2.19 kg·hm^(-2)和0.9768、0.40 kg·hm^(-2)和0.9853、4.06 kg·hm^(-2)和0.9886;果实中N、P、K积累量的标准误差RMSE和1∶1直线决定系数R^(2)分别为3.92 kg·hm^(-2)和0.9915、0.48 kg·hm^(-2)和0.9902、6.57 kg·hm^(-2)和0.9853。模型精准度高,可以预测各施氮处理下茄子全株及各器官的养分积累量,为日光温室茄子生产的智能化精准施肥管理提供决策依据。

Taking‘Qieza No.2’as test material,this paper analyzed the dynamic changes in the nutrient accumulation of eggplant whole plant,stem,leaf blade,fruit under 5 nitrogen application levels;and established a simulation model for nutrient accumulation in eggplant grafted in solar greenhouse based on the product of thermal effectiveness and photosynthesis active radiation.The results showed that this model could fairly accurately simulate the nutrient accumulation quantity of eggplant under different nitrogen application levels by using radiant heat product.Taking F3 treatment with the highest yield as reference,the standard error RMSE and 1∶1 straight lines determination coefficient R^(2)of N,P,K in plant were 4.88 kg·hm^(-2)and 0.9968,0.53 kg·hm^(-2)and 0.9983,7.85 kg·hm^(-2)and 0.9971,respectively.The standard error RMSE and the R^(2)between the 1∶1 straight lines determination coefficients of N,P,K in stem were 1.66 kg·hm^(-2)and 0.9576,0.59 kg·hm^(-2)and 0.9561,3.89 kg·hm^(-2)and 0.9820.The standard error RMSE and the R^(2)between the 1∶1 straight lines of N,P,K in leaf blade were 2.19 kg·hm^(-2)and 0.9768,0.40 kg·hm^(-2)and 0.9853,4.06 kg·hm^(-2)and 0.9886.The standard error RMSE and the R^(2)between the 1∶1 straight lines determination coefficients of N,P,K in fruit were 3.92 kg·hm^(-2)and 0.9915,0.48 kg·hm^(-2)and 0.9902,6.57 kg·hm^(-2)and 0.9853,respectively.The model had high accuracy and could predict the nutrient accumulation quantity in the whole plant and each organ of eggplant under every nitrogen application treatment,so as to provide decisionmaking basis for the intelligent and precise fertilization management for eggplant production in solar greenhouse.