摘要
目的研究密闭系统中光照强度和栽培密度对小麦生长状况的影响。方法实验设置4个光照强度水平（300，400，500和600txmol·m-2·s-1，光源为90％红光＋10％蓝光的组合LED灯）和4个栽培密度水平（200，400，600和800株·m-2），共16个处理，测定各处理下小麦的光合速率、产量和营养品质等指标。结果小麦光合速率随光照强度增加呈现先升后降的趋势，并在500μmol·m-2·s-1时达到最大；在所设栽培密度范围（200～800株·m-2）内，栽培密度对光合速率的影响不明显；产量随光照强度的变化趋势与光合速率的变化规律表现出较好的一致性，即在500μmol·m-2·s-1时达到最大。单株产量随栽培密度增大而降低，而单位面积产量随栽培密度增大而提高。以上各光照强度及栽培密度对籽粒营养品质影响不明显。结论在所用的红蓝LED光源下，500μmol·m-2·s-1的光照强度对密闭系统中小砉的培兼较为话宦：而左200～800株·m-2哉培密唐范围内．栽培密唐增大有利于小麦高产。
Objective To study the effects of light intensity and plant density on the growth of wheat in an en- closed system. Methods Sixteen treatments were set with light intensity of 300,400,500 and 600 μmol · m -2 ·s-1 and planting density of 200,400, 600 and 800 seeds · m -2 Photosynthetic rate, seed yield and seed nutrition quality were measured for each treatment. Results The photosynthetic rate of wheat had an increasing tendency at first and then decreased and reached maximum photosynthetic rate at 500 μmol · m-2 ·s-1 light intensity. Meanwhile, the photosynthetic rate was scarcely affected by the planting density in the range from 200 seeds μ m-2 to 800 seeds · m-2. The wheat at the light intensity of 500 μmol · m-2 · s -1 was the most productive in accordance with the effect of light intensity on photosynthetic rate. Among the four levels of planting density, the more densely planted group gained higher yield per m2, however, with a lower single plant yield. Conclusion Under the red-blue LED illumination, 500 μmol · m-2 · s-1 is the optimal light in- tensity for the growth of wheat in enclosed system. In the range from 200 seeds·m-2 to 800 seeds · m-2, denser planting can produce higher yield.
出处
《航天医学与医学工程》
CAS
CSCD
北大核心
2014年第1期54-58,共5页
Space Medicine & Medical Engineering
基金
人因工程自主课题(HF11ZZB01)
关键词
受控生态生保集成实验平台
小麦
光照强度
栽培密度
光合速率
CELSS integration experiment platform
wheat
light intensity
planting density
photosyntheticrate
