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缓释肥用量对薄壳山核桃容器苗生长及养分含量的影响(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2019年05期
Page:
163-168
Column:
专题报道
publishdate:
2019-09-20

Article Info:/Info

Title:
Effects of slow release fertilizer dosage on growth and nutrient contents of Carya illinoensis container seedlings
Article ID:
1000-2006(2019)05-0163-06
Author(s):
PAN Pingping12 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)
Keywords:
Carya illinoensis slow release fertilizer container seedling mineral nutrition
Classification number :
S718
DOI:
10.3969/j.issn.1000-2006.201811040
Document Code:
A
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.

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Last Update: 2019-10-08