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贵州黔中海拔1000米以上、年均温15℃以下温凉地区的石灰岩母质发育土壤中,全钾含量虽不低,但有效性差,处于实质性的匿乏状态,因而农作物往往出现缺钾症状,制约了单产的提高。笔者认为,在这些地区水稻高产栽培的肥料三大元素配比中,钾与氮之比至少应在0.8:1,若为1.1～2.0:1,则肥料利用率、单产均达到最高,可见钾在这部分地区的敏感程度和重要性。试验
Guizhou Guizhou at an altitude of 1000 meters above sea level, the average annual temperature below 15 ℃ in temperate limestone parent soil development, although the total potassium content is not low, but the effectiveness of poor, in a substantial state of silence, and therefore crops often potassium deficiency symptoms , Restricting the yield increase. In my opinion, the ratio of potassium to nitrogen should be at least 0.8: 1 in the proportion of three high-yielding fertilizers of rice in these areas. If the ratio is 1.1-2.0: 1, the fertilizer utilization rate and yield per unit reach the highest, showing that potassium In this part of the sensitivity and importance. test