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

doi:10.3969/j.issn.1000-2006.201811040

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. 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

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:

S718

PAN Pingping, DOU Quanqin, TANG Wenhua, XIE Yinfeng. 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.

Figures/Tables 4

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Table 1

Table 2

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References 28

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处理 treatment	根/g root	茎/g stem	叶/g leaf	总生物量/g total biomass	根冠比 root to shoot ratio
T0	8.33±2.04 b	1.53±0.42 b	2.19±0.68 b	12.05±2.88 c	2.27±0.41 a
T1	41.91±4.60 a	17.61±3.64 a	17.58±0.80 a	77.09±7.55 a	1.20±0.16 b
T2	37.34±4.58 a	13.37±3.40 a	15.96±2.07 a	66.68±7.22 ab	1.32±0.31 b
T3	34.38±2.27 a	10.13±2.26 a	12.02±1.31 a	56.54±2.68 b	1.58±0.27 ab

处理 treatment	总长/cm total root length	总表面积/cm² total root surface area	总体积/cm³ total root volume	平均直径/mm mean root diameter
T0	1 296.29±308.10 b	337.04±25.77 b	7.44±2.87 b	0.87±0.27 c
T1	3 021.77±255.96 a	1 254.58±177.66 a	49.97±7.23 a	7.08±1.69 a
T2	2 899.92±495.42 a	1 095.33±30.13 a	45.13±4.54 a	5.08±0.97 ab
T3	2 762.88±172.97 a	994.00±100.18 a	35.32±4.56 a	3.71±0.57 b

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

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