[1]唐桂兰,刘小星,芦建国.氮素指数施肥对夏蜡梅幼苗生长、养分分配的影响[J].南京林业大学学报(自然科学版),2017,41(06):134-140.[doi:10.3969/j.issn.1000-2006.201604043]
 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(Natural Science Edition),2017,41(06):134-140.[doi:10.3969/j.issn.1000-2006.201604043]
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氮素指数施肥对夏蜡梅幼苗生长、养分分配的影响
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《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

卷:
41
期数:
2017年06期
页码:
134-140
栏目:
研究论文
出版日期:
2017-11-30

文章信息/Info

Title:
Effects of nitrogen exponential fertilization on growth and nutrient distribution of Sinocalycanthus chinensis seedlings
文章编号:
1000-2006(2017)06-0134-07
作者:
唐桂兰1刘小星2芦建国2
1.南京林业大学土木工程学院,江苏 南京 210037; 2.南京林业大学风景园林学院, 江苏 南京 210037
Author(s):
TANG Guilan1 LIU Xiaoxing2 LU Jianguo2
1.College of Civil Engineering,Nanjing Forestry University, Nanjing 210037, China; 2.College of Landscape Architecture, Nanjing Forestry University, Nanjing 210037, China
关键词:
夏蜡梅 指数施肥 养分分配 氮素
Keywords:
Keywords:Sinocalycanthus chinensis exponential fertilization nutrient distribution nitrogen
分类号:
S722
DOI:
10.3969/j.issn.1000-2006.201604043
文献标志码:
A
摘要:
【目的】筛选适合夏蜡梅生长的最适施氮水平,为夏蜡梅规模化育苗生产提供技术参考。【方法】设置0、149、273、412、550 mg/株5个氮素水平处理,对夏蜡梅1年生苗进行指数施肥试验,观测其形态指标。【结果】在施氮量为149~412 mg/株时,夏蜡梅幼苗的形态指标随着施氮量的增加而增加,夏蜡梅幼苗的形态指标都随之提高。当施氮量超过412 mg/株,氮肥过高后,苗木的形态指标趋于稳定。当施氮量为149~412 mg/株,氮、钾素在根茎中的分配比率随着氮量的增加而提高,在叶中的分配比率随之降低; 磷在根茎的分配比率降低,在叶中的分配比率上升。当氮素施用量为412 mg/株时,夏蜡梅幼苗的氮、磷、钾养分含量最高。当氮素施用量为149~273 mg/株时,氮素吸收利用效率最好。【结论】273~412 mg/株的氮素指数施肥最有利于夏蜡梅幼苗的生长,且6—7月是夏蜡梅生长的高峰期,在此期间施肥效果较好。
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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备注/Memo

备注/Memo:
基金项目:江苏省林业三新工程项目(Lysx[2012]12) 第一作者:唐桂兰(860510418@qq.com),高级实验师。*通信作者:E-mail: ××。
更新日期/Last Update: 1900-01-01