随农作物产量增加,喜钾作物面积增大,以及化学氮、磷肥施用水平的迅速提高,缺钾严重的土壤已成为我县作物高产的障碍因素。1速效钾状况 1997年底,我们对全县9个代表土属农田的32个土样测定分析,土壤速钾含量平均91.6mg/kg,比1984年第二次土壤普查时的115mg/kg(n=350)下降23.4mg/kg,年均递减率为1.8mg/kg,速效钾含量小于100mg/kg(土壤缺钾、潜在缺钾)的土样本数70.6％;比第二次普查时的63％,增加6.4％,其中 With the increase of crop yield, the area of ​​hi potassium crop increased, and the application level of chemical nitrogen and phosphate fertilizer increased rapidly. The soil with high potassium deficiency has become the obstacle factor of high crop yield in our county. 1 Available potassium status By the end of 1997, we analyzed and analyzed 32 soil samples of 9 representative soil fields in the county. The average potassium content in soil was 91.6mg / kg, which was higher than 115mg / kg in the second soil survey in 1984 = 350) decreased by 23.4 mg / kg, the average annual decline rate was 1.8 mg / kg, the available potassium content was less than 100 mg / kg (soil potassium deficiency, potential potassium deficiency) %, An increase of 6.4%, of which