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５年的湿地松幼林施肥试验结果表明：在广西桂平市金田林场１４指数级林地上，Ｐ肥效应极显著，施用钙镁磷肥、过磷酸钙对湿地松幼林生长有明显的促进作用；施用钙镁磷肥和尿素，钙镁磷肥和氯化钾，以及三者的配比肥肥效十分明显．林地施用Ｐ２Ｏ５１００ｋｇ／ｈｍ２和１００ｋｇ／ｈｍ２Ｎ配合肥，可使林木的平均树高、胸径和单株材积分别提高２４．４％、５１．４％和１５７．１％；Ｐ２Ｏ５、Ｎ、和Ｋ２Ｏ各１００ｋｇ／ｈｍ２配合施用，林木的平均树高、胸径和单株材积可提高２０．３％、４９．０％和１４２．９％；Ｐ２Ｏ５１００ｋｇ／ｈｍ２和Ｋ２Ｏ１００ｋｇ／ｈｍ２配合施用时林木的树高、胸径和单株材积分别提高了２０．３％、４４．１％和１２８．５％；施用Ｐ肥的各处理林木的总平均、胸径和单株材积可提高１８．９％、４１．１％和１１７．１％，Ｐ肥的施入时间对林木的后期生长无显著差异；单施Ｋ肥或Ｎ肥对林木生长无促进作用．
The result of 5 years trial on the fertilization of Pinus elliottii in the young forest showed that the P fertilizer effect was extremely significant on the exponential forest land of Jintian Forestry Center in Guiping, Guangxi. The application of calcium magnesium phosphate and calcium superphosphate significantly promoted the growth of the young pine forest; Magnesium phosphate and urea, calcium magnesium phosphate and potassium chloride, as well as the ratio of three fertilizer effect is very obvious. The average tree height, DBH and single plant volume of forest trees increased by 24.4%, 51.4% and 157.1% respectively with the application of P2O5100kg / hm2 and 100kg / hm2N compound fertilizer in forestland; 100kg of P2O5, N and K2O / Hm2, the mean tree height, DBH and single plant volume increased by 20.3%, 49.0% and 142.9%, respectively. When the P2O5100kg / hm2 and K2O100kg / hm2 were applied, the tree height, The plant volume increased by 20.3%, 44.1% and 128.5% respectively. The average DBH and single plant volume increased by 18.9%, 41.1% and 117% respectively .1%, P fertilizer application time on the late growth of trees no significant difference; single K fertilizer or N fertilizer does not promote the growth of trees.