南京林业大学学报（自然科学版）2024，Vol.48Issue(3)：191-198,8.DOI:10.12302/j.issn.1000-2006.202203029
施肥方式和施肥量对华山松幼苗生长及针叶营养状况的影响
Effects of fertilization regime and rate on growth and needle nutrient level of Pinus armandii seedling
摘要
Abstract
[Objective]The effects of different fertilization regimes and rates on the growth of Pinus armandii seedlings and the contents of mineral nutrient elements and non-structural carbohydrates in their needles were investigated to provide a scientific reference for the cultivation of high-quality seedlings with abundant nutrition reserves.[Method]P.armandii seedlings were separately reared in the presence of four different doses of N(100,200,300 and 400 mg N per seedling)using a compound fertilizer(25％N,10％P2O5 and 20％K2O)under conventional and exponential fertilization regimes.The control setup was not treated with the fertilizer.The fertilizer was applied 12 times at 2-week intervals.The shoot height,root collar diameter,biomass and the contents of N,P,K,soluble sugar,starch and non-structural carbohydrates in the needles were measured after two weeks of the last application of the fertilizer.[Result]The shoot height,root collar diameter and biomass increased at first but subsequently decreased as the rate of the fertilizer was increased,under both application regimes.The shoot height,root collar diameter and biomass were the highest at the dose of 300 mg N per seedling under the exponential fertilization regime,being 1.29,1.15 and 1.53 fold those of the control.Fertilization enhanced the content of N in the needles,and the N content increased as the rate of the fertilizer was increased.The N content in the needles was higher under the exponential fertilization regime than under the conventional fertilization regime for the same doses of the fertilizer.There were no significant differences in the P content of the needles.The K content in the needles increased at increasing rates of the fertilizer under the conventional fertilization regime.However,the K content increased at first but decreased subsequently at increasing rates of the fertilizer under the exponential fertilization regime.The content of soluble sugar decreased significantly following fertilization,and the contents decreased at first but increased subsequently at increasing rates of the fertilizer.The contents of starch and non-structural carbohydrates in the needles increased significantly under the rational fertilization regime,and exponential fertilization was more preferable.[Conclusion]The exponential application of 1.2 g of the fertilizer(300,120 and 240 mg of N,P2 O5 and K2O,respectively)per seedling was found to be the optimal fertilization regimen for cultivating high-quality P.armandii seedlings.关键词
华山松/壮苗培育/指数施肥/养分积累/非结构性碳水化合物Key words
Pinus armandii/high-quality cultivation/exponential fertilization/nutrient accumulation/non-structural carbohydrates分类
农业科技引用本文复制引用
丰伟,单昌丹,张慧,刘家蔓,柳国昂,姚增玉..施肥方式和施肥量对华山松幼苗生长及针叶营养状况的影响[J].南京林业大学学报（自然科学版）,2024,48(3):191-198,8.基金项目
云南省农业基础研究联合专项(2018FG001-008). （2018FG001-008）
