JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2019, Vol. 43 ›› Issue (5): 163-168.doi: 10.3969/j.issn.1000-2006.201811040

Special Issue: 薄壳山核桃专题

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Effects of slow release fertilizer dosage on growth and nutrient contents of Carya illinoensis container seedlings

PAN Pingping1,2(), DOU Quanqin1,*(), TANG Wenhua2, XIE Yinfeng2,*()   

  1. 1. Jiangsu Academy of Forestry, Nanjing 210014,China
    2. Co-Innovation Center for the Sustainable Forestry in Southern China, College of Biology and the Environment, Nanjing Forestry University,Nanjing 210037, China
  • Received:2018-11-25 Revised:2019-06-07 Online:2019-10-08 Published:2019-10-08
  • Contact: DOU Quanqin,XIE Yinfeng E-mail:pancy_p@163.com;douqq@2008163.com;xxyy@njfu.edu.cn

Abstract:

【Objective】 The objective of the present study was to explore the effects of slow-release fertilizer dosage on the growth and nutrient contents of pecan (Carya illinoensis) container seedlings and to determine a reasonable slow-release fertilizer dosage for cultivating these seedlings. 【Method】 A single-factor, completely randomized block design was used to set up the treatments T0, T1, T2 and T3 (0, 3, 6 and 9 kg/m3, respectively) with different slow-release fertilizer dosages, and the growth of seedlings and nutrient content [nitrogen (N), phosphorus (P) and potassium (K)] were determined and compared. 【Result】 Compared with the control treatment (T0), the different slow-release fertilizer treatments significantly promoted seedling height, root collar diameter, biomass per plant, total root length, total root surface area, total root volume, root diameter, and N, P, and K levels in all organ. The nutrient content improved the root-to-shoot ratio, and the treatment effect was found to be optimum with T1. As the fertilizer concentration increased, the promoting effect decreased. Dynamic measurement showed that the slow-release fertilizer treatment maintained rapid increase in seedling height and root collar diameter during the treatment period; the root collar diameter lasted longer than other factors, and the growth stage (after mid-August) and seedling height were non-synchronous. 【Conclusion】 An appropriate slow-release fertilizer dosage can promote growth, biomass accumulation, and root development in pecan container seedlings. The promoting effect was related to increased nutrient content, and the optimum fertilizer dosage was 3 kg/m3.

Key words: Carya illinoensis, slow release fertilizer, container seedling, mineral nutrition

CLC Number: