油茶幼林地土壤的养分变化规律

Soil nutrients dynamics in young Camellia oleifera plantations

通过对油茶幼林土壤养分进行测定分析,得出各元素含量的变化规律。土壤有机质、水解氮和速效磷的变化趋势较一致,呈交替升降态,即3—7月先降低后升高,7—10月再次降低后升高;全氮3—7月呈渐增态,7—10月呈下降态;全磷变化不大,相对稳定;速效钾3—5月变化不大,之后有所升降,但保持在较高水平。

The changes of soil nutrients were studied through the determination and analysis of soil nutrients in the young Camellia oleifera plantations in different seasons.The results showed that the content of soil organic matter,hydrolyzable nitrogen（N） and available phosphorus（P） varied similarly with time.All were decreased at first,and then increased from March to July,and it was the same from July to October.Total N was gradually increased from March to July,while it was decreased from July to October.Total P was almost not changed with time.Soil available K remained at a high level during the seasons although it was a little decreased after May.