摘要
通过不同间作比例的玉米/大豆间作试验,建立了基于辐射截获与利用的玉米/大豆间作群体生长和产量的模拟模型。作物总生物量和产量为光合有效辐射(PAR)、辐射截获率(F)以及辐射利用效率(RUE)的函数,根据太阳辐射(SR)与PAR的比例可估算PAR,采用Keating和Carberry建立的公式计算F值,利用生长度日(GDD)确定作物的出苗、开花与成熟时期。模拟结果表明模型能够较为准确地模拟水分充足条件下间作群体的总生物量和产量。
In this study,a radiation interception and utilization model was developed through an experiment on maize/soybean intercropping systems with different intercropping proportions of maize and soybean to assess crop growth and yield.In the model,crop biomass and yield are calculated as functions of photosynthetic active radiation （PAR）,radiation interception fraction （F） and radiation use efficiency （RUE）.PAR is estimated from ratios of PAR to solar radiation （SR）.F is calculated by using the Keating and Carberry equation.Time for emergence,flowering and maturity are determined by growing degree days （GDD） since planting.Results indicate that the model accurately simulates total biomass and yield of fully irrigated maize/soybean intercropping system.
出处
《中国生态农业学报》
CAS
CSCD
北大核心
2010年第5期965-968,共4页
Chinese Journal of Eco-Agriculture
基金
国家自然科学基金项目(50679082)
国家高技术研究发展计划(863计划)项目(2006AA100209)
国家科技支撑计划项目(2007BAD88B02)
商丘农田生态系统国家野外观测研究站开放基金项目资助
关键词
玉米/大豆间作
生物量
生长度日
光合有效辐射
辐射截获率
辐射利用效率
模型模拟
Maize/soybean intercrop
Biomass
Growing degree days
Photosynthetic active radiation
Radiation interception fraction
Radiation use efficiency
Model simulation
