据文献报道,作物对钾的吸收利用受遗传因素的影响(高桥英一等,1980),水稻不同品种在低钾条件下的产量有明显差异(刘亨官,1982)。我们设想,弄清水稻在低钾条件下产量的基因型差异以及耐低钾品种对钾的吸收利用特点,以期选育新品种,提高水稻对低钾的耐性,减少钾肥用量。现将该项 It has been reported in the literature that the uptake and utilization of potassium in crops is influenced by genetic factors (Takahashi et al., 1980). There are significant differences in the yield of different varieties of rice under low potassium (Liu, 1996). We envisaged to find out the genotypic differences of rice yield under low K and the absorption and utilization of potassium by low K tolerant cultivars in order to select new varieties, improve rice tolerance to low potassium and reduce the amount of K fertilizer. Now this item