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Position: Home > Articles > Effect of N Nutrient on Growth and Nutrient Use Efficient of Lespedeza formosa Seedling Journal of Zhejiang Forestry Science and Technology 2010,30 (5) 5-8

氮营养对美丽胡枝子幼苗生长和氮、磷养分吸收的影响

作  者:
严世峰;柏明娥;徐高福;洪利兴;陈大富;张健
单  位:
浙江省安吉县林业局;浙江省林业科学研究院;浙江省淳安县新安江开发总公司
关键词:
氮营养;美丽胡枝子;幼苗生长;养分吸收
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。
译  名:
Effect of N Nutrient on Growth and Nutrient Use Efficient of Lespedeza formosa Seedling
作  者:
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, China; 3. Anji Forestry Bureau of Zhejiang, Anji 313300, China)
关键词:
N nutrient; Lespedeza formosa; seedling growth; nutrient use
摘  要:
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 seedling increased with the increase of N supply. When N supply was at 0-50mg/kg, P content in root, stem and leaf increased with the increase of N supply, and when N supply was surpass 100mg/kg, P content decreased.

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