红壤水稻土施用钾肥,可以促进水稻根系生长,早发快长,增强抗逆性,达到壮杆黄熟,明显改善穗部的经济性状,增产效果显著。1977年据早稻的6个试点结果,在以草子为基肥的条件下,每亩施用正品硫酸钾20斤,平均增收稻谷67.6斤,增产率为15.9%,晚稻则以温州产次品硫酸钾为主,在不施有机肥的条件下,6个点的试验,效果也较好。每亩平均增收稻谷65.1斤,增产率为12.8%。在晚稻 The application of potassium fertilizer to paddy soil in red soil can promote the root growth of rice, grow faster and earlier, increase the resistance, reach the strong yellow barley, obviously improve the economic traits of ear and increase the yield significantly. According to the results of the six pilot projects of early rice in 1977, under the condition of grass-based fertilizer, 20 kg of genuine potassium sulfate per acre was applied, with an average increase of 67.6 kg of rice and an increase rate of 15.9%. In late rice, Lord, without organic fertilizer conditions, the six-point test, the effect is better. The average yield per acre of paddy 65.1 kg, an increase of 12.8% yield. In late rice