Effects of nitrogen exponential fertilization on growth and nutrient distribution of Sinocalycanthus chinensis seedlings

TANG Guilan, LIU Xiaoxing, LU Jianguo

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2017, Vol. 41 ›› Issue (06) : 134-140.

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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 ›› 2017, Vol. 41 ›› Issue (06) : 134-140. DOI: 10.3969/j.issn.1000-2006.201604043

Effects of nitrogen exponential fertilization on growth and nutrient distribution of Sinocalycanthus chinensis seedlings

  • TANG Guilan1, LIU Xiaoxing2, LU Jianguo2
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Abstract

【Objective】This paper provides the theoretical background for selecting the ideal nitrogen level for Sinocalycanthus chinensis seedlings and conducting nursery production on a large scale. 【Method】Exponential fertilization using nitrogen was conducted for S. chinensis seedlings at five levels(0, 149, 273, 412 and 550 mg/tree). 【Result】The seedling morphology indices related to growth rate increased with an increase in the N application rate when nitrogen levels were between 149-273 mg/tree. The morphological indicators tended to be stable when the N supply was higher than 412 mg/tree. Between nitrogen levels of 149-273 mg/tree, the distribution ratio of N and K in the roots and stems increased with an increase in the nitrogen application rate, while that of P decreased; however, the distribution ratios of N and K in the leaves decreased, while that of P increased. The highest N, P and K nutrient contents of the seedlings were observed when the nitrogen application rate was 412 mg/tree. The highest nutrient absorption and utilization efficiency results were observed for nitrogen levels of 149-273 mg/tree. 【Conclusion】Exponential fertilization using nitrogen at levels of 273-412 mg/tree was most beneficial for seedling growth, and June and July were the peak months in which strongest effects of fertilization on seedling growth were observed.

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TANG Guilan, LIU Xiaoxing, LU Jianguo. Effects of nitrogen exponential fertilization on growth and nutrient distribution of Sinocalycanthus chinensis seedlings[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2017, 41(06): 134-140 https://doi.org/10.3969/j.issn.1000-2006.201604043

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