【摘要】 以水、土壤、砂子、土壤+砂子和土壤+沸石为介质,研究了5种控/缓释肥的溶(淋)出特征。结果表明,由于性质不同,同一肥料在不同介质中的溶(淋)出率和溶(淋)出模式有很大差异。水中溶出率虽可以快速比较不同控/缓释肥的溶出速率,但用以估测肥料在田间的实际肥效,则产生较大的误差。客观、合理地评价控/缓释肥,应该在"肥料 土壤 作物"系统中考虑。相对而言,考虑土壤因子的土柱淋出率法较水中溶出率法更为接近田间实际。更多还原

【Abstract】 Several media (water, soil, sand, mixture of soil and sand, and mixture of soil and zeolite) were used to study the nutrient release characteristics of five controlledrelease fertilizers (CRFs) or slowrelease fertilizers (SRFs). The results showed that for a fertilizer there were significant differences in release pattern and release rate when dissolving or leaching in different media due to the different properties. So considerable errors might occur if water dissolution rate method was used to estimate the fertilizer efficiency although the method can make quick comparisons of nutrient release rates among different CRFs/SRFs. More objective and reasonable evaluation of CRFs/SRFs should be taken in the system of "Fertilizersoilcrop". Comparatively, soil column leaching method was much closer to the field reality than water dissolution rate method.更多还原