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缓释肥施用量对槲栎容器苗苗木质量的影响(PDF)

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

Issue:
2019年01期
Page:
69-75
Column:
研究论文
publishdate:
2019-01-28

Article Info:/Info

Title:
Effects of slow-release fertilizer rate on the quality of Quercus aliena container seedlings
Article ID:
1000-2006(2018)06-0069-07
Author(s):
YAO Guanggang1LI Guolei1*ZHENG Yonglin1XUE Dunmeng2LI Shian2YUAN Qihua3
1. College of Forestry,Beijing Forestry University, Beijing 100083, China; 2. Beijing Dadongliu Nursery, Beijing 102211, China; 3. Beijing Wenquan Nursery, Beijing 100095, China
Keywords:
Quercus aliena Bl. container seedling slow-release fertilizer nutrients non-structural carbohydrate(NSC)
Classification number :
S723.7
DOI:
10.3969/j.issn.1000-2006.201801025
Document Code:
A
Abstract:
【Objective】 Determine the effects of slow-release fertilizer on seedling growth, nutrient accumulation, and non-structural carbohydrate(NSC)of Quercus aliena container seedlings.【Method】 Experiments were conducted using five different rates(0.24, 0.95, 1.91, 3.81 and 5.71 g/L)of slow-release fertilizer(15% N+9% P2O5+12% K2O+2% MgO+trace element)per liter media with a completely random design. At the end of the first growing season, the seedling height, diameter, biomass, as well as content and concentration of nutrients and NSC of Q. aliena were determined. 【Results】Height, plant biomass, plant nitrogen content, starch content, and soluble sugar content were higher with 0.95, 1.91, and 3.81 g of slow-release fertilizer per liter media than those with 0.24 g per liter media. When the rate increased to 5.71 g per liter media, no beneficial effects on height were observed. In contrast, lower plant starch content and soluble sugar content were observed at a rate of 5.71 g per liter media.【Conclusion】The recommended fertilization rate was 0.95-3.81 g per liter media of slow-release fertilizer for Q. aliena container seedlings, which is equivalent to 100-400 mg N per seedling. Tissue nutrient concentration was used by foresters to gauge nutritional status as follows: in root, N 1.63%-1.93%; P 0.48%-0.52%; K 0.65%-0.79%; in stem, N 1.11%-1.43%; P 0.24%-0.25%; K 0.28%-0.44%. From the fertilizer use efficiency, cost and environment protection perspective, the fertilization rate was determined as 0.95 g slow-release fertilizer per liter media(100 mg N per seedling). Soluble sugar and starch content are important indices to optimize nursery fertilization.

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Last Update: 2019-01-28