基于CERES-Rice模型的覆膜旱作稻田增温效应模拟  

Modeling increasing effect of soil temperature through plastic film mulch in ground cover rice production system using CERES-Rice

作　　者：马雯雯[1] 金欣欣[1] 石建初[1] 宁松瑞[2] 李森[1] 陶玥玥[1] 张亚男[1] 左强[1] 

机构地区：[1]中国农业大学资源与环境学院,北京100193 [2]中国农业大学水利与土木工程学院,北京100083

出　　处：《农业工程学报》2015年第9期215-222,共8页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金项目(51139006;51321001)

摘　　要：水稻覆膜旱作技术具有显著的节水、增温、防污和减排效应,是节水稻作技术体系的重要措施之一,将CERES-Rice模型用于覆膜旱作条件时,必须首先解决覆膜增温效应的准确模拟问题。该文拟应用热量传输理论及目前旱地作物生产系统中采用的覆膜增温效应模拟方法,来模拟水稻覆膜旱作生产体系中的增温效应,从而为完善CERES-Rice模型并使其能用于覆膜旱作水稻的生长模拟奠定基础。参数调校与模型检验验证通过2013、2014年在湖北房县开展的2 a水稻覆膜旱作田间试验来进行,共涉及淹水(对照)、覆膜湿润栽培和覆膜旱作共3个水分处理,分别对2个生长季、2个覆膜处理地表5 cm及地下10、20 cm处温度的变化过程进行了模拟,结果表明:经过参数调校后,所建立的覆膜增温模型可较好地模拟覆膜稻田地表和剖面上土壤温度的变化规律,地表5 cm处土壤温度模拟值与实测值的均方根差、相对均方根差分别低于1.8℃和10%,相关系数在0.89以上(P<0.01);尽管地下10、20 cm处的模拟误差稍大,也基本可满足要求,相应的均方根误差<3.2℃,相对均方根差<15%,相关系数>0.65(P<0.01)。As one of the most promising water-saving rice production technologies, the ground cover rice production system （GCRPS） has been found to save water application, increase soil temperature, and reduce nitrogen pollution and methane emission. However, the feasibility of CERES-Rice, a software package widely and successfully applied in the traditional paddy rice production system （TPRPS）, for simulating the rice growth in the GCRPS still remains unknown and needs further research. Undoubtedly, it should be based on accurately quantifying the effect of soil temperature enhancement caused by the ground cover material （chosen as the plastic film in this study）. Therefore, the objective of this study was to improve the two simulation models for both soil surface and subsurface temperatures in CERES-Rice through taking the effect of soil temperature enhancement by the film mulch into consideration. The simulation model of surface soil temperature （at the depth of 5 cm） was referred from other study for dry land crops, and the other one was from CERES-Rice for simulating the subsurface temperatures （at 10 and 20 cm, respectively） in the TPRPS. To justify and rectify the simulation models, we conducted a field experiment in Fangxian, Hubei, China （32°7′N, 110°42′E, altitude 450 m） from 2013 to 2014, covering two growth seasons of rice. Three treatments （named as TPRPS, GCRPSsat and GCRPS80%, respectively） were designed and replicated three times in 9 plots, each with an area of 9×10 m2. A seepage-proof material was laid around each plot to the depth of 80 cm to avoid lateral percolation between neighbor plots. Five soil beds （156 cm wide and 940 cm long） in each plot were built for planting rice, with the space of 26×18 cm2 and at a rate of two plants per hill. Small furrows （15 cm in width and depth） were dug around each soil bed. In the three replicated plots without plastic film for treatment TPRPS, a water layer of 2-5 cm in thickness was always maintained on the soil beds. I

关 键 词：模型 土壤 覆膜 水稻覆膜旱作 增温效应 模拟 CERES-Rice 

分 类 号：Q178.516[生物学—水生生物学] TU205[生物学—普通生物学]