不同施肥处理马尾松幼林生长及其营养元素含量的研究

Studies on the Growth and Contents of Nutrients of Young Forest of Pinus massoniana Treated with Different Fertilizers

广西桂平市金田林场马尾松幼林施肥试验已连续４年。测定结果表明：不同施肥处理对马尾松幼林的生长有显著的影响。施氮磷钾肥的４年生幼林的树高、胸径和生物量比不施肥的同龄幼林分别高５５．３％、１０８．４％和１１９．６％；施磷钾肥的幼林依次高５１．９％、１０２．１％和９４．３％；施磷肥的幼林依次高２９．６％、６２．８％和６２．０％。幼林施肥直接增加了林地土壤的有效养分含量，并促进了植株对养分元素的吸收。

The fertilizer experiments for young forest of Pinus massoniana in Jintian Forest Station of Guiping County of Guangxi have been four years continuously.The results show:there are marked effects for different fertilizer treatments on the growth of young for est of P.massoniana.The tree height,diameter and biomasses of the young forest treated with nitrogen,phosphorus and potassium are 55.3%,108.4% and 119.6% higher than control,respectively,and the treatment with phosphorus and potassium those of the 51.9%,102.1% and 94.3% higher,respectively,and the treatment with phosphorus 29.6%,62.8%and 62.0% higher,respectively.The dressing on young forest increased the effective nutrients in soil of forestland,and promote absorption of nutrients by trees,promoting the growth of young forest.