不同肥料对菜地土壤有机质和全氮含量的影响

Effects of Different Fertilizer on Soil Organic Matter and Soil Total Nitrogen Content

对不同施肥条件下菜地土壤有机质和全氮含量变化进行了较系统的研究。结果表明:与对照相比,尿素、鸡粪、玉米秸秆在Ⅰ施肥水平上,使土壤有机质含量分别增加12.24%、27.43%、26.35%;土壤全氮含量分别增加15.42%、39.85%、33.28%。均显著高于对照。在Ⅱ施肥水平上使土壤有机质含量分别增加了25.34%、49.03%、50.25%;使土壤全氮分别增加20.00%、61.98%、42.29%。在Ⅲ施肥水平上使土壤有机质含量分别增加34.13%、51.55%、71.71%,土壤全氮含量分别增加22.90%、83.36%、70.99%。3种肥料不同施肥水平对土壤有机质含量影响顺序依次是鸡粪、秸秆、尿素(Ⅰ施肥水平)和秸秆、鸡粪、尿素(Ⅱ、Ⅲ施肥水平)。在不同施肥水平上,对土壤全氮含量的影响大小顺序均是鸡粪、玉米秸秆和尿素。

Soil organic matter and soil total nitrogen content in different fertilizer was systemic studied.The results showed that urea,chicken manure,maize straw made soil organic matter content increased 12.24%,27.43%,26.35% respectively compared with the control in the Ⅰ fertilization level.Soil total nitrogen content increased 15.42%,39.85%,33.28% respectively compared with the control in theⅠfertilization level.There were significantly higher than control.Urea,chicken manure,maize straw made soil organic matter content increased 25.34%,49.03%,50.25%respectively in theⅡ fertilization level.Soil total nitrogen content increased 20.00%,61.98%,42.29%respectively in theⅡfertilization level.Urea,chicken manure,maize straw made soil organic matter content increased 34.13%,51.55%,71.71%,and soil total nitrogen content increased 22.90%,83.36%,70.99% respectively in the Ⅲ fertilization level.The affect order for soil urease activity by 3fertilizers in different fertilizer levels was chicken manure,straw,urea.The affect order for soil organic matter content was chicken manure,maize straw,urea in Ⅰ fertilization level and maize straw,chicken manure,urea in Ⅱ and Ⅲ fertilization level.The effect order for soil total nitrogen content was chicken manure,maize straw,urea in 3 fertilization levels.