基于累积热量单位的甜瓜幼苗发育期模拟  

Simulation of muskmelon seedling development stage based on accumulated thermal units

作　　者：李彭丽 张亚琪[1] 陈罡晓[1] 牛庆良[1] LI Peng-li ZHANG Ya-qi CHEN Gang-xiao NIU Qing-liang(School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, Chin)

机构地区：[1]上海交通大学农业与生物学院,上海200240

出　　处：《上海农业学报》2016年第5期46-51,共6页Acta Agriculturae Shanghai

基　　金：上海市西瓜甜瓜产业技术体系种苗组项目;"863"项目[设施农业数字化管理与精准化作业技术研究(2012AA101903)]

摘　　要：为了准确预测厚皮甜瓜幼苗的发育期,提高育苗效率和幼苗质量,对较大温度变化范围内的5次育苗试验数据进行分析,建立了基于累积热量单位的甜瓜幼苗发育期模拟模型。结果表明:甜瓜幼苗期可精确地划分为出苗期、子叶展平期、一片真叶期、二片真叶期、三片真叶期、三叶一心期;完成各生育期所需的累积热量单位分别为2 283.7℃·h、527.8℃·h、2 162.4℃·h、2 104.2℃·h、2 266.0℃·h、1 320.1℃·h;完成幼苗全生育期所需的累积热量单位为10 664.3℃·h。模型检验表明预测性较好。In order to accurately predict the development stages of muskmelon seedling and improve the efficiency of nursery and the quality of seedling,5 plug seedling experiments in a contrasting temperature range were conducted and the effect of accumulated thermal units（∑Tu） on muskmelon development was studied,a simulation model for development stage was built as well based on ∑Tu.The results showed that seedling stage could be accurately divided into emergence period,cotyledon flattening period,one true leaf period,two true leaves period,three true leaves period,three leaves and one half leaf period.∑Tu demanded for each period were2 283.7 ℃·h,527.8℃·h,2162.4℃·h,2 104.2℃·h,2 266.0℃·h,1 320.1℃·h respectively.∑Tu demanded for whole seedling growth and development stage was 10 664.3℃·h.Simulation model validation results showed that the model possessed higher accuracy and practicality.

关 键 词：甜瓜幼苗 累积热量单位 发育期 模拟模型 

分 类 号：S652[农业科学—果树学]