长期施用有机肥和磷肥对潮褐土土壤有机质及腐殖质组成的影响

采用长期肥料定位试验,研究了施用有机肥和磷肥对土壤有机质、腐殖质含量与组成的影响。结果表明:与本试验布置时的基础土样相比,连续10年隔年施用有机肥、有机肥和磷肥配施使土壤有机质增加了8.4%~17.3%,单施磷肥土壤有机质下降了7.8%~10.7%,其差异均达显著水平;与P0M0相比,单施磷肥、有机肥、有机肥和磷肥配施处理的土壤中有机质分别增加了2.9%~6.2%、24.8%~29.8%、25.2%~35.1%;土壤腐植酸总量及胡敏酸含量与土壤有机质含量呈显著正相关关系;施用磷肥利于土壤富里酸的积累,并影响土壤胡富比。

Effects of long term application of organic manure and phosphate fertilizer on soil organic matter and humus composition

The effect of organic manure and phosphate fertilizer on soil organic matter and humus content and composition was studied in a long term experiment.The results showed that:compared with the basic experiments soil,the soil organic matter content increased significantly by 8.4%~17.3% for the organic manure treatment and the combined application treatment of organic manure and phosphate fertilizer,and decreased significantly by 7.8%~10.7% for the phosphate fertilizer treatment during a 10 years period with fertilizer application at every other year.Compared with the P0M0 treatment,the organic matter content increased by 2.9%~6.2%,24.8%~29.8%,25.2%~35.1% respectively for phosphate fertilizer,organic manure application pattern and combined application of organic mannure and phosphate fertilizer.There was a significant positive correlation between the amount of soil humic carbon or humic acid carbon and soil organic matter content.Application of phosphate was good for the accumulation of soil fulvic acid,it could affect the proportion of soil humic acid and fulvic acid.