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

PAN Pingping, DOU Quanqin, TANG Wenhua, XIE Yinfeng

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2019, Vol. 43 ›› Issue (5) : 163-168.

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

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

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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

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PAN Pingping , DOU Quanqin , TANG Wenhua , et al. Effects of slow release fertilizer dosage on growth and nutrient contents of Carya illinoensis container seedlings[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2019, 43(5): 163-168 https://doi.org/10.3969/j.issn.1000-2006.201811040

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