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通过对贵州独山地区人工草地黄壤农化样品与剖面样品的养分含量以及土壤对钾素的固定性能的分析测定，结果表明，该地区人工草地土壤速效钾（K）含量为38.5～1244mg／kg，缓效钾（K）含量为96.8～320.5mg／kg。土壤交换性镁钾比例较高，以致交换性钾饱和度较低，导致土壤钾素供应不良。土壤对施入钾素具有较强的固定能力.固钾量与施钾量是显著正相关，其相关系数γ为0.889，而固钾百分率与施钾量呈负相关，其相关系数γ为-0.442。田间单播和混播两种人工草地上证明施用适量的钾肥不仅能促进牧草生长、增加产草量和提高土壤钾素肥力，而且在钾肥施用量上呈逐年减少。
The results showed that the content of available K in the artificial grassland was 38.5-1244mg / kg in the artificial grassland of Guizhou Province, , Slow potassium (K) content of 96.8 ~ 320.5mg / kg. Soil exchangeable magnesium and potassium ratio is higher, resulting in lower exchangeable potassium saturation, resulting in poor soil potassium supply. The soil had a strong ability to fix potassium, and the correlation between the amount of potassium and the amount of potassium was significant and the correlation coefficient γ was 0.889, while the percentage of potassium was negatively correlated with the amount of potassium applied, the correlation coefficient γ was - 0.442. Field unicast and mixed-sowing two kinds of artificial grassland to prove that the application of appropriate amount of potash not only can promote pasture growth, increase the amount of grass and increase soil fertility, but also in the amount of potash decreased year by year.