Rain intensity has little effect on er of rapidly available k and slowly available k , and leads some decrease of er of rapidly available k . er of rapidly available k increases with the decrease of slope gradient 雨强对速效钾、缓效钾的富集率影响不大，速效钾的富集率有一定的减少；随着坡度的减小，速效钾富集率有增大的趋势。
Organic matter and available n of topsoil decreased in recreational areas , but the soil bulk density and ph increased . affected by garbage decomposing , soil available p concentration varied obviously in recreational areas 活动区土壤有机质含量降低， ph值升高，容重增大，碱解氮含量降低，受垃圾分解影响，速效磷含量发生变化。
The results showed that the index of organic matter , total nitrogen , total phosphorus , available nitrogen , phosphorus and potassium in 16 - year - old organic tea garden were higher than those of 10 - year - old and 4 - year - old 结果表明， 16年生有机茶园土壤在有机质、全氮、全磷、速效氮、速效钾等各项指标上均高于10年生和4年生有机茶园土壤。
3 . there were close relations between soil avail . p and the three indices , total p , o . m and mineral particles of 0 . 02 ~ 0 . 002mm in diameter , according to correlation analysis , path analysis and stepwise regression 通过相关分析、通径分析和逐步回归分析，发现土壤速效磷与全磷、有机质、 0 . 02 0 . 002mm矿质颗粒这三项指标关系比较密切。
