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通过对17a生马尾松近熟林施肥试验4年的生长效应分析表明:在南方红壤地区施适量的P,K肥对马尾松近熟林生长有显著的促进作用,但施用过量却有负作用;施N肥短期内对林木生长不利;施肥效果显著时可掩盖林地本身质量对林木生长的影响。根据对各肥种水平效应值的分析可知,最佳施肥处理为每株混施P2O590g,K2O 90g,其4年蓄积定期生长量比对照高13.4%。施肥措施对促进小径阶木生长有利。在肥效期内施肥措施与马尾松近熟林的生长效应呈显著相关性。
The growth effects of 4 years fertilization on Pinus massoniana near-mature forest by 17-year-old pineapple showed that the application of P and K fertilizers significantly promoted the growth of Pinus massoniana near-mature forest in the red soils of South China, but had negative effects ; Application of N fertilizer in the short term adverse effect on forest growth; significant effect of fertilizer can cover the impact of woodland itself on the quality of forest growth. According to the analysis of the effect of fertilizer level, we can see that the best fertilization treatment is P2O590g and K2O 90g per plant, and the accumulative regular growth of 4 years is 13.4% higher than that of the control. Fertilization measures to promote the growth of footpath wood beneficial. Fertilization in the fertilizer period and near-mature Pinus massoniana growth effect was significantly correlated.