不同光质和光照度对寒地水稻秧苗素质的影响

Effects of Different Lighting Quality and Intensities on Seedling Quality of Rice in Cold Region

以适合寒地种植不同生育期的水稻品种(系)为试验材料,在苗期设置不同光质和光照度的LED灯光照射处理,研究光对寒地水稻秧苗生长的影响,以期为寒地在冬季实现室内培育水稻提供参考。结果表明,两种光质处理对水稻秧苗的影响相似;不同水稻品种对光的反应有所差异,但提高光照度后水稻秧苗有叶龄进程加快、根数增多、茎基变宽、地上部干质量和根干质量增加、壮苗指数提高的趋势,适当增加光照度有利于培育水稻壮苗。与对照相比,光照度1 700 lx左右时水稻秧苗素质较差,光照度3 500 lx左右时水稻秧苗素质相近,光照度5 300 lx左右时水稻秧苗素质显著提高。

By using different genotype of rice varieties(strains)suitable for cultivation in cold region as experimental materials, the effects of light on the growth of rice seedlings were studied by setting different light quality and light intensities with LED lights at seedling stage, in order to provide reference for indoor cultivation of rice in cold region in winter. The results showed that the effects of two light quality treatments on rice seedlings were similar;the responses of different rice varieties(strains)to light were different,but after increasing light intensity, the leaf age of rice seedlings accelerated, the number of roots increased, the base stem width, shoot dry weight, root dry weight and the seedling index increased. Strong seedling could be cultivated by appropriate increase of light intensity. Compared with the control, the quality of rice seedlings was poor when the intensity was about 1700 lx;when the intensity was about 3500 lx, the quality of rice seedlings was similar;when the intensity was about 5300 lx, the quality of rice seedlings was significantly improved.