南京林业大学学报（自然科学版）2019，Vol.43Issue(4)：17-25,9.DOI:10.3969/j.issn.1000-2006.201811026
控释肥类型与施肥量对2年生油松容器苗苗圃表现的交互影响
Effect of controlled-release fertilizer (type and dosage) on the performance of nursery-grown Pinus tabulaeformis Carr.seedlings
摘要
Abstract
[Objective] Non-structural carbohydrates (NSCs) are a critical parameter affecting seedling quality and have not been widely adopted while optimizing fertilizer regimes.Controlled-release fertilizer (CRF) is a simple and effective substitute for fertigation and can be used to optimize nutrient delivery in nursery settings.However,the mechanisms by which fertilizer type and dosage interact to influence nursery performance of multiple-year-old seedlings is peody understood.[Method] Two-year-old,container-grown Pings tabulaeformis Carr.(Chinese pine) seedlings were fertilized with CRF,with either one or two coating layers applied at seven dosages,ranging from 0 to 9.2 g/L medium (0 to 1 350 mg N per seedling).At the end of the second growing season,the dry mass,mineral nutrients and NSCs of the seedlings were measured.[Result] There was a significant interaction between the P and NSC status.Dry mass and content of N and NSC exhibited a curvilinear relationship with fertilizer dosage,reaching optimal values with multiple-layer CRF at 4.5-6.1 g/L.Furthermore,it appeared that dosage levels of 9.2 g/L were toxic for plant diameter,dry mass and N content,whereas dosages of 7.6-9.2 g/L were toxic for starch and soluble sugar content.For luxury conditions,the recommended needle concentrations of N,P and K are 2.80％-3.05％,0.20％-0.24％ and 3.40％-3.41％,respectively.[Conclusion]Based on cost and fertilizer use efficiency,the ideal fertilization regime for the two-year-old P.tabulaeformis seedlings was the use of two-layered CRF at a dosage of 4.5 g/L (675 mg N per seedling).关键词
油松/施肥体系/肥料类型/奢侈消耗/叶片N浓度Key words
Pinus tabulaeformis Carr.(Chinese pine)/fertilization regime/fertilizer type/luxury consumption/friar N concentration分类
农业科技引用本文复制引用
王苗苗,张瑞,李国雷,付妍琳,王佳茜,刘文..控释肥类型与施肥量对2年生油松容器苗苗圃表现的交互影响[J].南京林业大学学报（自然科学版）,2019,43(4):17-25,9.基金项目
中央高校基本科研业务费专项资金项目(2017PT02) （2017PT02）
国家自然科学基金项目(31670628). （31670628）
