铝、硒、硅和磷复合处理对水稻幼苗生长的影响

采用二次正交旋转组合设计，以铝(Al)、硒(Se)、硅(Si)、磷(P)为处理因子，建立了多因子复合处理对水稻品种金优725幼苗存活率、百株苗鲜质量、百株根鲜质量和根脯氨酸含量影响的回归模型，并分析了各因子的主效应和互作效应.结果表明：在供试条件下，影响水稻幼苗生长的单因子主效应大小为Al>P>Se>Si.其中，Al表现为负效应，而P、Se和Si表现为正效应；除Al与Si的互作外，各因子间的互作效应均未达到显著水平.模拟寻优结果表明，Al在0.587～0.913 mmol·L^-1、Se在0.478～0.564 mg·L^-1、Si在0.613～1.069 mmol·L^-1、P在2.252～2.657 mmol·L^-1浓度范围时，可使水稻幼苗在一个存在铝胁迫的营养液环境下达到一个较佳的生长状态.

Individual and interactive effects of aluminum, selenium, silicon and phosphorus on rice seedlings growth.

By using quadratic orthogonal rotation combinatorial design, and taking aluminum (Al), selenium (Se), silicon (Si), and phosphorus (P) as test factors, the regression models of test factors and the survival rate (SR), shoot mass per hundred plants (SMHP), root mass per one hundred plant seedlings (RMHP), and proline contents (PC) of rice seedlings were established, with the individual and interactive effects of the factors analyzed. The individual effects of test factors on the SR, SMHP, RMHP, and PC of rice seedlings decreased in the order of Al>P>Se>Si. Al showed negative effect, while Se, Si, and P showed positive effect. There were no significant interactive effects between the factors, except between Al and Si. Simulated optimization test showed that rice seedlings could grow better in an Al-containing solution when the Al was within the range of 0587〖KG-*2〗-〖KG-*7〗0913 mmol·L-1, Se was of 0478〖KG-*2〗-〖KG-*7〗0564 mg·L-1, Si was of 0613〖KG-*2〗-〖KG-*7〗1069 mmol·L-1, and P was of 2252 〖KG-*2〗-〖KG-*7〗2657 mmol·L-1.