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.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
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
关键词
LED
光照
设计
间作套种
光环境
模拟
大豆
light emitting diodes
light
design
intercropping
illuminant environment
simulation
soybean
