Effects of slow-release fertilizer rate on the quality of Quercus aliena container seedlings

YAO Guanggang,LI Guolei,ZHENG Yonglin,XUE Dunmeng,LI Shian,YUAN Qihua

Journal of Nanjing Forestry University (Natural Sciences Edition） ›› 2019, Vol. 43 ›› Issue (01) : 69-75.

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南京林业大学学报（自然科学版）
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Journal of Nanjing Forestry University (Natural Sciences Edition） ›› 2019, Vol. 43 ›› Issue (01) : 69-75. DOI: 10.3969/j.issn.1000-2006.201801025

Effects of slow-release fertilizer rate on the quality of Quercus aliena container seedlings

  • YAO Guanggang1,LI Guolei1*,ZHENG Yonglin1,XUE Dunmeng2,LI Shian2,YUAN Qihua3
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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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YAO Guanggang,LI Guolei,ZHENG Yonglin,XUE Dunmeng,LI Shian,YUAN Qihua. Effects of slow-release fertilizer rate on the quality of Quercus aliena container seedlings[J]. Journal of Nanjing Forestry University (Natural Sciences Edition）. 2019, 43(01): 69-75 https://doi.org/10.3969/j.issn.1000-2006.201801025

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