林业科学2026，Vol.62Issue(6)：36-45,10.DOI:10.11707/j.1001-7488.LYKX20250653
氮磷配施促进杉木生长和材质稳定性:来自长期施肥试验的启示
Combined Application of Nitrogen and Phosphorus Enhance the Growth and Wood Quality Stability of Chinese Fir:Insights from a Long-Term Fertilization Experiment
摘要
Abstract
[Objective]This study aims to investigate the effects of different fertilization treatments on the growth and wood quality parameters of Chinese fir(Cunninghamia lanceolata),thereby providing a theoretical basis for cultivating high-quality large-diameter timber and achieving sustainable forest management.[Method]Based on a long-term fertilization experimental platform for Chinese fir plantations,four treatments were set up:control,nitrogen application alone(100 kg·hm-2 a-1),phosphorus application alone(50 kg·hm-2 a-1),and combined application of nitrogen and phosphorus(100 kg·hm-2 a-1 N+50 kg·hm-2 a-1 P).The fertilization experiment was initiated in 2012,with fertilizers applied four times annually(in March,June,September,and December,at proportions of 30%,30%,20%,and 20%,respectively).Nitrogen and phosphorus fertilizers were applied in the forms of ammonium nitrate and sodium dihydrogen phosphate,respectively,mixed uniformly with river sand.Tree-ring analysis was employed to measure annual ring width and latewood rate for each year from 2011 to 2023.The responses of growth and wood property indicators to long-term fertilization were analyzed based on the inter-annual coefficient of variation(CV)of ring width and latewood rate,along with fertilization effect values.The piecewise linear regression and mixed-effects models were used to identify the impacts of fertilization duration and tree diameter class on these indicators.[Result]1)Compared to single-nutrient applications,the combined application of the N+P dampened the interannual fluctuations in ring width and latewood rate caused by extreme drought,buffering tree growth sensitivity and yielding wood uniformity comparable to the control.2)Under the N+P treatment,the cumulative promoting effect on growth peaked after four consecutive years of fertilization,resulting in a 31.8%increase in cumulative ring width compared to the control.Concurrently,the decrease in cumulative latewood rate was more moderate than that under the P-alone treatment and remained similar to the control levels.3)The N+P combination alleviated competition among trees of different diameter classes,promoted overall stand growth,and effectively suppressed the diameter class differentiation phenomenon induced by single-nutrient fertilization.[Conclusion]It is recommended to implement a combined nitrogen and phosphorus application regimen on a four-year cycle in mid-aged C.lanceolata stands.This approach aims to enhance growth rates while ensuring uniformity in wood texture and maintaining hardness.关键词
杉木/氮磷施肥/年轮宽度/晚材率/干旱响应/可持续经营Key words
Cunninghamia lanceolata/nitrogen and phosphorus fertilization/tree-ring width/latewood rate/drought response/sustainable management分类
农业科技引用本文复制引用
李达海,卜文圣,杨风亭,孟盛旺,高德才,寇亮,王辉民,付晓莉..氮磷配施促进杉木生长和材质稳定性:来自长期施肥试验的启示[J].林业科学,2026,62(6):36-45,10.基金项目
国家重点研发计划青年科学家项目(2022YFD,2201500) （2022YFD,2201500）
江西省"双千计划"(jxsq2023102215). （jxsq2023102215）
