Effect of Low Light on Grains Growth and Quality in Rice

A three-replicate, split-plot experiment was designed for this study, in which three rice hybrids were used as main plot treatments and shading was used as the subplot treatments. The grains weight and grains quality were measured during filling period. The final grains weight, grain filling rate and relative initial grains filling power decreased under low-light stress, and the grains-filling parameters in whole grains were less than that in superior grains. The brown rice yield, milled rice yield, head milled rice yield, translucency and gel consistency were significantly lower in low-light conditions than in control. The chalk kernel rate and the chalk degree were significantly higher in treatment than in check. The amylase content significantly decreased and protein content significantly increased while light density diminished.