Effects of Fertilization and Pruning on Sapling Growth of Phoebe bournei (Hemsl.) Yang

From 2017 to 2021, to study the effects of its growth and leaf nutrient content, L₉(3⁴) orthogonal test of different fertilizer types, fertilizer dosage and pruning intensities was conducted in a 3-year-old stand of Phoebe bournei in Qiandun Work Area, Qiandun Village, Lanxia Township, Shunchang County, Fujian Province.The results showed that fertilization and pruning management have obvious promoting effect on Phoebe bournei young plantation growth, breast diameter and tree height of 7-year-old respectively were 23.03% and 23.53% higher than the control.The effects of different fertilizer types, fertilizer amount and pruning intensity on the growth of young forest were significantly or extremely significantly differences.The growth promoting effect of pruning 1/4 height of young trees with compound fertilizer Batian Gaota of 100~125 g·tree^-1 was the best, whose average breast diameter and tree height of P.bournei were reaching 4.67 cm and 4.66 m respectively after implementation, they were 68.12% and 36.91% higher than the average.The effects of different fertilization and pruning on the nutrient contents of nitrogen, potassium, calcium and magnesium in the leaves of young Phoebe bournei were significant or extremely significant, but the effects on the content of phosphorus were not significant.The main nutrient elements affecting the growth of Phoebe bournei young forest were N, K and Ca, and N-Ca, P-K and K-C had positive correlation effects.Through artificial fertilization and pruning, the tree nutrition structure can be supplemented or improved, so as to improve the yield and quality of the stand.