Root-applied silicon in the early bud stage increases the rapeseed yield and optimizes the mechanical harvesting characteristics

摘要: Abstract A liquid silicon fertilizer [Si(OH)4] was root sprayed at various concentrations during the seedling stage (T1) and early bud (T2) using rapeseed varieties (Brassica napus L.) Huayouza 62 Fengyou 520. The lodging- yield-related index, silique shatter were evaluated. Our results indicated that lodging resistance, yield all increased significantly in two after application of both stages. seed number per reduced application, but plant 1000-grain weight increased, especially on branches, thereby improving overall yield, where most obvious effect increase occurred T2 with 0.96 mM silicon. At T1 stages, higher concentration diameter, as well stem SiO2 content breaking strength, height index. There also increases expression levels key genes related to lignin biosynthesis (phenylalanine ammonia lyase (PAL) 4-coumarate: CoA ligases), content, increasing resistance lodging. stages T2, PAL, which induced accumulation lignin. a significant correlation between dry resistance. Considering mechanical harvesting properties, present study show optimum (bolting 8–12 cm) monosilicic acid 0.96 mM.