几种活化钾长石的释钾特点及肥效研究

Study of Characteristics of Potassium Release and Fertilizer Efficiency of Several Activated Potassium Feldspars

通过筛选不同的活化剂并优化活化条件,研究了活化钾长石中钾释放效果并通过玉米盆栽试验研究活化钾长石的生物有效性。试验结果表明:6种不同活化剂对钾长石均有一定的活化作用,其中QN活化效果最好;不同活化剂用量、烘干温度及钾长石粒径对钾的释放也有明显的影响,增加活化剂用量、提高烘干温度、减小钾长石粒径有利于钾的释放,其中烘干温度对钾释放效果影响最大。盆栽试验结果表明,各活化钾长石部分取代氯化钾处理的生物量均有所增加。施用活化钾长石处理能够提高四苯硼钠法提钾量,增强土壤供钾能力,且能够提高土壤p H,防止土壤酸化。活化技术为难溶性钾矿的开发利用开拓了一条新的途径。

Through screening different activators and optimizing activation conditions,a study iscarried out of potassium release effect of activated potassium feldspars,and by pot experiment onmaize,the bio-availability of activated potassium feldspars is researched. Experimental results showthat all 6 different activators have certain activation effect on potassium feldspars,among which the QNhas the best activation effect; different activator amount,drying temperature and particle size ofpotassium feldspar have significant effect on the release of potassium,increasing activator amount,raising drying temperature and reducing particle size of potassium feldspar benefit the release ofpotassium,among which the drying temperature has the greatest effect on the release of potassium. Thepot experiment results show that the biomass of each of activated potassium feldspars partly replacedpotassium chloride is increased. Applying activated potassium feldspar treatment can increaseextractable potassium of sodium tetraphenylboron method and has a positive effect on the availability ofsoil potassium. It can also increase soil pH,preventing soil acidification. The activation technologyprovides a new approach for develop and use of insoluble potassium mineral.