不同光照强度的LED光对水稻秧苗素质的影响
毕业论文关键词：水稻育秧；光照强度；生长；秧苗素质
Effect of LED light with different light intensity on seedling quality of rice
Abstract： It is of great significance for rice production in artificial growing room.In this experiment, the rice variety 4 was used as experimental material. The optical density were set to 300 (RBG300), 350 (RBG350) and 400 (RBG400)µmol m-2 s-1.Meanwhile, the white LED was set as control (CK).The effects of LED (RBG) with different light intensity on seedling growth and seedling quality of rice were studied.The results showed that: LED light treatment of rice stem diameter and root number were greater than CK treatment, CK treatment plant height was higher than that of LED treated rice.The dry weight of rice under RBG400 treatment was higher than that of other treatments, and the fresh weight of RBG350 was higher than that of other treatments.The soluble protein content of RBG350 treatment was the highest, while the soluble sugar content of CK treatment was higher than that of LED under light treatment.The content of photosynthetic pigment in LED light treatment was higher than that of control group, and the pigment content of RBG400 was the highest.The net photosynthetic rate, stomatal conductance, intercellular CO2 concentration and transpiration rate were the highest under the RBG350 treatment, and decreased significantly when the light density increased to 400.The results showed that the appropriate increase of light density could increase the plant height and the biomass of seedlings increased with the increase of light density.
Key words: Rice seedling raising ；Light intensity ；Growth；Seedling quality
目 录
摘要 3
关键词 3
Abstract 3
Key words 4
1 材料与方法 5
1．1 试验材料 5
1．2 试验设计 5
1．3 测定项目及方法 6
1．4 统计分析 6
2 结果与分析 6
2．1 不同光密度对水稻秧苗生长动态的影响 6
2．2 不同光密度对水稻秧苗生物量的影响 7
2．3 不同光密度对水稻秧苗可溶性蛋白和可溶性糖的影响 8
2．4 不同光密度对水稻秧苗叶片光合色素的影响 8