Effect of spatial spectral distribution of LED plane light sources on the growth of pepper

doi:10.14088/j.cnki.issn0439-8114.2019.13.017

Abstract

Abstract: The effects of spatial spectral distribution on the growth of pepper（Capsicum annuum L.） were studied. Using a plane LED light source to set the spatial spectrum required for pepper growth, three areas with a red light intensity ratio of 3∶2∶1 were selected to observe and record the growth process of pepper; The contrast experiments were conducted by changing the blue-red light intensity and blue-red light ratio. As a result, it was found that the weight of the pepper in the region with the strongest red light intensity was twice that of the weakest region; Under the condition that the ratio of blue to red light was unchanged, the weight of pepper dropped by about 7.0% in the region where the intensity of blue-red light intensity is reduced by 20.0%, the weight of the pepper in the region with a 5∶1 blue-red light ratio was about 69.0% lower than that in the 1.2∶1 blue-red light ratio. The results showed that the regions with strong spatial distribution of red light were more conducive to pepper growth, and changes in spatial light intensity had a certain effect on the growth of pepper when the ratio of spectral red-blue light was invariable, it was also found that the regions with strong spatial distribution of blue light was not conducive to pepper growth.

Key words: plane LED light sources, spatial spectral distribution, pepper growth

CLC Number:

S641.3

DENG Li-song, CHEN Fang-lin, PENG Xuan, XU Min-min, GAO Xiang-ming, YUAN Jin-she. Effect of spatial spectral distribution of LED plane light sources on the growth of pepper[J]. HUBEI AGRICULTURAL SCIENCES, 2019, 58(13): 84-87.

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