| 氮营养对美丽胡枝子幼苗生长和氮、磷养分吸收的影响 |
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| 引用本文： | 严世峰,柏明娥,徐高福,洪利兴,陈大富,张健.氮营养对美丽胡枝子幼苗生长和氮、磷养分吸收的影响[J].浙江林业科技,2010,30(5). |
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| 作者姓名： | 严世峰 柏明娥 徐高福 洪利兴 陈大富 张健 |
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| 作者单位： | 浙江省淳安县新安江开发总公司;浙江省林业科学研究院;浙江省安吉县林业局; |
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| 基金项目： | 浙江省农业科技成果转化资金项目 |
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| 摘 要： | 采用盆栽沙培法,研究分析了0、50、100、175mg/kg4种不同氮营养供给水平对美丽胡枝子(Lespedeza formosa)幼苗生长和其体内氮、磷二种养分浓度变化的影响。结果表明,施加0～100mg/kg氮对幼苗株高、地上和地下部分的生长都有促进作用,但超过100mg/kg氮时,过量供氮对幼苗的生长产生抑制作用;氮供给不足时,幼苗表现出将更多的生物量分配到根系,根冠比大;幼苗根和茎叶中的氮浓度随供氮水平的增加而增加。在供氮为0～50mg/kg时,幼苗根和茎叶中的磷浓度随氮浓度的增加稍有下降,当供氮浓度在50～100mg/kg时,根和茎叶中磷浓度随氮浓度的增加而升高,当氮浓度超过100mg/kg时,其根和茎叶中的磷浓度随氮浓度的增加而呈下降趋势。
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| 关 键 词： | 氮营养 美丽胡枝子 幼苗生长 养分吸收 |
Effect of N Nutrient on Growth and Nutrient Use Efficient of Lespedeza formosa Seedling |
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| YAN Shi-feng,BAI Ming-e,XU Gao-fu,HONG Li-xing,CHEN Da-fu,ZHANG Jian.Effect of N Nutrient on Growth and Nutrient Use Efficient of Lespedeza formosa Seedling[J].Journal of Zhejiang Forestry Science and Technology,2010,30(5). |
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| Authors: | YAN Shi-feng BAI Ming-e XU Gao-fu HONG Li-xing CHEN Da-fu ZHANG Jian |
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| Institution: | YAN Shi-feng1,BAI Ming-e2,XU Gao-fu1,HONG Li-xing2,CHEN Da-fu1,ZHANG Jian3 (1. Chun'an Xin'anjiang Development Company of Zhejiang,Chun'an 311700,China,2. Zhejiang Forestry Academy,Hangzhou 310023,3. Anji Forestry Bureau of Zhejiang,Anji 313300,China) |
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| Abstract: | Experiment was conducted on effect of four different N supply levels (0, 50,100 and 175mg/kg) on seedling growth of Lespedeza formosa and N and P content in seedling. The result showed that N supply of 0-100mg/kg could promote seedling height, aerial and underground growth of the seedlings, while treatment with 175mg/kg inhibited seedling growth. When N supply was insufficient, seedlings would allocate much biomass to root system, causing large root crown rate. N content in root, stem and leaf of tested see... |
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| Keywords: | N nutrient Lespedeza formosa seedling growth nutrient use |
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