LED灯模拟作物间作套种群体内光环境的设计与应用  

Design and effect of LED simulated illumination environment on intercropping population

作　　者：刘卫国[1] 宋颖[2] 邹俊林[1] 张云松[3] 梅林森[1] 蒋涛[1] 杨文钰[1] 

机构地区：[1]四川农业大学农学院,成都611130 [2]四川农业大学艺术与体育学院,雅安625014 [3]四川农业大学生命理学院,雅安625014

出　　处：《农业工程学报》2011年第8期288-292,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金项目(31071373);国家重点基础研究发展计划项目(2011CB100402);现代大豆产业技术体系专项

摘　　要：在室内有效模拟作物复合群体内的光环境,是深入研究作物间作套种分子生态机理的基础。该文首先设计了一种用于植物室内培养的发光二极管(LED)照明灯具,其主要特点包括:选用蓝光、红光、远红光3种对作物生长发育影响最大的高功率LED灯珠为光源,按照1:3:3的比例进行组合,从而形成光照均匀的光源板;应用散热片、风道、风扇对光源板进行有效散热;采用脉宽调制(PWM)方式实现每种灯辐射强度的连续、独立调节。为进一步验证其功能,以玉米-大豆套作模式为例,根据田间自然光环境和两作物复合群体内光环境的实际测定值,采用所设计的灯具进行2种光环境的模拟。通过对光环境和作物生长指标的测定,结果表明,此法成功模拟了作物间作套种田间光环境,光照均匀性好,大豆生长一致,表现出典型的避荫性反应。Simulating effectively illumination environment indoor for the compound crop population is the basis for further study on molecular mechanism of intercropping system. Therefore a light-emitting diode （LED） lamp was designed as the light source for cultivating plant indoor. Three high powered LEDs, blue, red and far-red light which has most impact on crop growth were selected to compose the LED panel by a ratio of 1：3：3 in order to provide an uniform lighting;cooling fin, air passage and fan were used to cool the LED panel;PWM method was adopted to regulate the radiation intensity continuously and respectively. Moreover, maize-soybean relay strip intercropping system was employed to test the performance of the LED lamp by imitating two different light environments in line with the natural and two-crop-compound light environment in field while the light environment and crop growth indexes were measured;and the results show that the light environment of relay strip intercropping system was simulated suitably with the LED lamp;the light was uniform; the soybean grew in order and exhibited typical shade-avoidance responses.

关 键 词：LED 光照 设计 间作套种 光环境 模拟 大豆 

分 类 号：S318[农业科学—作物栽培与耕作技术]