液体硅钾肥对杂交晚稻抗倒伏性和物质生产的影响初探

Preliminary Study on Effects of Liquid Silicon-potash Fertilizer on Lodging Resistance and Matter Production of Hybrid Late Rice

为指导水稻高产栽培和液体硅钾肥推广应用提供理论依据和技术支持,以杂交晚稻‘C两优396’为材料,研究了液体硅钾肥对水稻单株抗折力、干物质生产以及结实率的影响,结果表明:施用液体硅钾肥后基部第1、第2节间长度缩短,穗颈节间长度拉长,提高水稻植株单株抗折力,降低倒伏指数,以施3000mL/hm2处理倒伏指数最低(5.33);液体硅钾在提高植株生物产量的同时,加快了穗部物质转移,提高了灌浆速度,施用液体硅钾肥后粒重和结实率均得到提高,以3000mL/hm2最高。综合抗倒性、干物质积累、结实率等因素,超级杂交晚稻‘C两优396’上液体硅钾肥的最佳施用量为3000mL/hm2。

Using ‘C Liangyou396 ＇,a hybrid late rice variety,as the meterial,the effects of liquid silicon-potash fertilizer on resistant press per plant,dry matter production and seed setting rate were studied.The results showed that the application of liquid silicon-potash fertilizer shortened the basal internode length and elongated the panicle neck internode length,improved the resistant press per plant of rice,reduced the lodging index,and it was lowest at the amount of 3000 mL/hm 2.Applying liquid silicon-potash fertilizer had effects on improvement of the plant biomass and matter translocation at grain-filling stage,increased the filling speed,grain weight,and the seed setting rate,both the highest values were obtained at the amount of 3000 mL/hm 2.As considered comprehensively,the optimum amount of liquid silicon-potash fertilizer application was 3000 mL/hm 2.