钾肥对寒地水稻产量及抗病性的影响

对不同钾肥用量在虎林地区水稻上的应用进行试验研究,结果表明:在相同氮肥、磷肥用量的条件下,随着钾肥施用量的增加,水稻稻瘟病、褐变穗的病穗率有所下降。与K0处理相比,稻瘟病发病率下降2%~10%,褐变穗发病率下降6%~14%。随着钾肥用量的增加,水稻干物质积累及产量有增加的趋势。与K0处理相比,处理K3增产91.9 kg/667 m2,增产15.7%。

Effect of Potash on Yield and Resistance of Rice in Cold Region

Test of different content of potash were made on rice. The result indicated that rice blast and browning had declined with the increase of the amount of potash fertilizer under the same conditions of N and P. Compared with treatment-K0, incidence of rice blast fell 2%-10%, incidence of browning fell 6%-14%. dry matter accumulation and yield had rising trend with the increase of the amount of potash fertilizer. Compared with treatment-K0, treatment-K3 can increase production by 91.9 kg/667 m2 which the rate of rice production was 15.7%.