草地学报

›› 2006, Vol. 14 ›› Issue (1): 52-56.DOI: 10.11733/j.issn.1007-0435.2006.01.012

• 研究论文 • 上一篇    下一篇

施肥对苏丹草产草量和氮磷钾养分吸收的影响

李小坤, 鲁剑巍   

  1. 华中农业大学资源与环境学院, 湖北, 武汉, 430070
  • 收稿日期:2005-05-26 修回日期:2005-10-14 出版日期:2006-02-15 发布日期:2006-02-15
  • 通讯作者: 鲁剑巍,E-mail:lujianwei@mail.hzau.edu.cn
  • 作者简介:李小坤(1979- ),男,湖北襄樊人,硕士研究生,研究方向为植物营养与施肥,Email:lixiaokun@webmail.hzau.edu.cn.
  • 基金资助:
    加拿大钾磷研究所(PPI/PPIC)国际合作项目(Hub-20)

Effect of Fertilization to the Yield and NPK Nutrient Absorption of Sudangrass

LI Xiao-kun, LU Jian-wei   

  1. College of Resources and Environment, Huazhong Agriculture University, Wuhan, Hubei Province 430070, China
  • Received:2005-05-26 Revised:2005-10-14 Online:2006-02-15 Published:2006-02-15

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摘要： 研究施肥措施对苏丹草产草量以及对氮磷钾养分吸收的影响。结果表明:推荐施肥能显著提高产草量,比习惯施肥增产28.2%,比对照区增产150.0%。各处理的干物质日积累量均在出苗后第38~62d达最大值,分别为335.6、322.9和213.8 kg/hm2/d。在试验条件下,每生产1t苏丹草鲜草,推荐施肥需吸收N 2.59 kg、P2O50.65 kg和K2O 3.13 kg,其N:P2O5:K2O=1:0.25:1.21;习惯施肥需吸收N 2.56 kg、P2O50.76 kg和K2O 3.30 kg,其N:P2O5:K2O=1:0.30:1.29;对照区需吸收N 2.39 kg、P2O50.98 kg和K2O 3.06 kg,其N:P2O5:K2O=1:0.41:1.28。

关键词: 施肥, 苏丹草, 产草量, 氮磷钾, 养分吸收

Abstract: A field experiment was conducted to study the effect of different fertilization measures to the yield and NPK nutrient absorption of Sudangrass.Results show that the recommended fertilization treatment increased the yield of Sudangrass remarkably during the whole grass growing period.The yield increased by（28.2%） compared to the habitual fertilizing practice,and by 150.0% compared to no fertilization.Normally,the period between 38 to 62 days after the seedlings emergence sees the largest amount of dry matter accumulation,reaching 335.6 kg/hm2/d with the recommended fertilizing,322.9 kg/hm2/d with the habitual fertilizing practice,and 213.8 kg/hm2/d without fertilization.Under the condition of the present experiment,to yield a ton of fresh Sudangrass with the recommended fertilization, 2.59 kg of N,0.65 kg of P2O5,and 3.13 kg of K2O were needed,the ratio of the three fertilizers is N:P2O5:K2O=1:0.25:1.21;to yield a ton of the grass with the habitual fertilization practice,2.56 kg of N,0.76 kg of P2O5,and 3.30 kg of K2O were absorbed,and the ratio of the fertilizers is N:P2O5:K2O=1:0.30:1.29.Even with no fertilizer applied to the Sudangrass,a ton of fresh grass yield would absorb from the soil 2.39 kg of N,0.98 kg of P2O5,and 3.06 kg of K2O,and the ratio is N:P2O5:K2O=1:0.41:1.28.

Key words: Fertilization, Sudangrass, Yield, NPK, Nutrient absorption

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