三种有机无机复混钾肥钾素的释放与供应特征

The characteristic of K release and supply of organic inorganic compound K fertilizer

在实验室条件下,通过间歇淋洗培养和土壤培养试验研究了不同有机无机复混钾肥钾素的释放与供应特征。在等化肥钾量投入条件下,与化学钾肥相比,供试的3种有机无机复混钾肥没有显著影响到钾素在石灰性土壤中的释放规律;土壤速效钾含量有所增加,糖渣系、糠醛渣系和污泥系有机无机复混钾肥处理的土壤速效钾含量分别比化学钾肥处理增加了13.5%、12.7%和1.6%。与化学钾肥处理相比,糖渣系、糠醛渣系有机无机复混钾肥处理的钾素(K)固定量分别减少了42和39 mg/kg。

Under laboratory condition,study on the characteristic of K release and supply of organic-inorganic compound K fertilizer was carried out by means of leaching and incubating experiment.Under equal inorganic K input rate,organic-inorganic compound K fertilizer did not influence the rule of K realease in lime soil,compared to inorganic K fertilizer;Compared to the treatment of inorganic K fertilizer,dressing organic-inorganic compound K fertilizer increased the concentration of soil activated K by 13.5%,12.7% and 1.6% corresponding to different organic materials sugar residue,furfural residue,and bio-solids,respectively.Also,organic-inorganic compound K fertilizer containing sugar residue and furfural residue decreased the amount of K fixed by soil components on the basis of chemical K fertilizer.