摘要
【目的】土壤是刺槐人工林高效生长的重要保障,培育二代萌生林是营建刺槐高质量人工林的重要方式,然而目前对幼龄期刺槐萌生林施肥效应的研究较少,缺乏相关应用技术研究。因此,对刺槐萌生二代林开展施肥效应研究,探究二代刺槐萌生林生长效果最佳的施磷量以及施肥方式,为幼龄期刺槐萌生林精准施肥提供可行的技术方案。【方法】以刺槐8年生二代萌生林为试验材料,采用不同的施肥方式以及施肥量,采用双因素随机区组试验设计,对供试刺槐的生长指标以及叶片的氮(N)、磷(P)、钾(K)元素含量进行持续监测。【结果】结果表明,施磷肥对二代刺槐萌生林生长具有显著的促进作用;对于刺槐的不同培育目标,可通过采取不同的施肥量与施肥方式进行精准培育管理,如培育能源林可采用撒施75 g/株P_(2)O_(5)处理,而培育优质建筑材林则可以采用撒施50 g/株P_(2)O_(5)处理;对幼龄期刺槐萌生林,撒施75 g/株P_(2)O_(5)处理,刺槐胸径、材积、生物量及高层叶N、P、K营养元素含量均达到最大值,并且显著大于其他处理;在撒施100 g/株P_(2)O_(5)处理下,树高达到最大值;低层叶的P、K营养元素含量在撒施50 g/株P_(2)O_(5)处理下达到最大值。【结论】通过对所测指标结果的综合评价,撒施75 g/株P_(2)O_(5)处理对幼龄期刺槐萌生林的生长起到最优的效果。
【Objective】Fertile soil is an important guarantee for the efficient growth of Robinia pseudoacacia plantations.Nowadays,cultivating second-generation sprouting forests is an important way to build high-quality Robinia pseudoacacia plantations.However,there is currently little research on the fertilization effect of young Robinia pseudoacacia sprouting forests and a lack of relevant application technology research.Therefore,a study was conducted on the fertilization effect of second-generation Robinia pseudoacacia sprouting forests to explore the optimal phosphorus application rate and fertilization method for promoting the growth of secondgeneration Robinia pseudoacacia sprouting forests,providing feasible technical solutions for precise fertilization of young Robinia pseudoacacia sprouting forests.【Method】Using 8-year-old second-generation Robinia pseudoacacia sprouts as experimental materials,a two factor randomized block design was adopted for different fertilization methods and amounts.The growth indicators and nitrogen(N),phosphorus(P),and potassium(K)element contents of the tested Robinia pseudoacacia leaves were continuously monitored.【Result】The results showed that the application of phosphorus fertilizer had a significant promoting effect on the growth of second-generation Robinia pseudoacacia sprouting forests;For different cultivation goals of Robinia pseudoacacia,precise cultivation and management can be achieved by adopting different fertilization amounts and methods.For example,for cultivating energy forests,75 g/plant P_(2)O_(5) can be applied,while for cultivating high-quality building timber forests,50 g/plant P_(2)O_(5) can be applied;For the juvenile Robinia pseudoacacia sprouting forest,the application of 75 g/plant P_(2)O_(5) treatment resulted in the maximum values of diameter at breast height,volume,biomass,and nitrogen,phosphorus,and potassium nutrient content in the upper leaves of Robinia pseudoacacia,which were significantly higher than other treatments;Under the treatment of applying 100 g/plant P_(2)O_(5),the tree height reached its maximum value;The content of P and K nutrients in the lower leaves reached its maximum value under the treatment of 50 g/plant P_(2)O_(5) application.【Conclusion】Based on the comprehensive evaluation of the measured indicators,this study concludes that broadcasting 75 g of P_(2)O_(5) per tree is the most effective fertilization treatment for promoting the growth of young Robinia pseudoacacia coppice stands.
作者
王鑫喆
彭祚登
李一鸣
WANG Xinzhe;PENG Zuodeng;LI Yiming(State Key Laboratory of Efficient Production of Forest Resources,Beijing Forestry University,Beijing 100083,China)
出处
《中南林业科技大学学报》
北大核心
2025年第8期95-102,共8页
Journal of Central South University of Forestry & Technology
基金
国家重点研发计划(2024YFD2200205)。
关键词
刺槐
施肥
生长指标
营养元素
Robinia pseudoacacia
fertilization
growth indicators
nutrients
