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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，因而加速了林木的生长
The trial of Pinus massoniana young plantation in Jintian Forest Farm, Guiping, Guangxi has been carried out for 4 consecutive years. The results showed that different fertilization treatments had significant effects on the growth of young masson pine. The tree height, DBH and biomass of four-year-old young forest with N, P and K fertilizers were 55.3%, 108.4% and 119.6% higher than those of the same age without fertilization, respectively. , 102.1% and 94.3%, respectively. Young plantations of P fertilizers were 29.6%, 62.8% and 62.0% higher than those of the control. Young plantation fertilization directly increases the available nutrient content of forest soils and promotes plant uptake of nutrient elements, thus accelerating forest tree growth