›› 2012, Vol. 20 ›› Issue (6): 1099-1104.DOI: 10.11733/j.issn.1007-0435.2012.06.019

• 研究论文 • 上一篇    下一篇

施肥和播种量对扬州地区苜蓿生长特性和产草量的影响

潘玲, 魏臻武, 武自念, 张栋, 郑曦, 陈斐, 刘倩, 李伟民   

  1. 扬州大学动物科学与技术学院 扬州大学草业科学研究所, 江苏 扬州 225009
  • 收稿日期:2012-05-23 修回日期:2012-08-21 出版日期:2012-12-15 发布日期:2012-12-28
  • 通讯作者: 魏臻武
  • 作者简介:潘玲(1988-),女,甘肃临夏人,硕士研究生,研究方向为牧草栽培育种,E-mail: panling1988@yahoo.cn;
  • 基金资助:
    国家863计划项目(2008AA10Z149);国家自然科学基金项目(30972136);国家科技支撑计划(2008BADB3B10)资助

Effects of Fertilizers and Sowing Rates on Growth Characteristics and Forage Yields of Alfalfa in Yangzhou Region

PAN Ling, WEI Zhen-wu, WU Zi-nian, ZHANG Dun, ZHENG Xi, CHEN Fei, LIU Qian, LI Wei-min   

  1. College of Animal Science & Technique, Institute of Forage and Grassland Science, Yangzhou University, Yangzhou, Jiangsu Province 225009, China
  • Received:2012-05-23 Revised:2012-08-21 Online:2012-12-15 Published:2012-12-28

摘要: 用裂区试验设计研究扬州地区苜蓿(Medicago sativa)不同播种量和施肥水平对产草量及生产性能的影响。结果表明:江淮地区苜蓿推荐播种量为18.75 kg·hm-2,氮、磷、钾推荐施用量分别为23,113,68 kg·hm-2时,此时苜蓿的理论产草量可达22858.25 kg·hm-2。单独施用氮、磷、钾肥时,在一定范围内对苜蓿产草量有促进作用,但当超过最大施用量时,对苜蓿的生长反而造成抑制。建议氮肥施用量不超过30 kg·hm-2,磷肥施用量不超过130 kg·hm-2。氮、磷、钾共同施用时苜蓿产草量才能达到最大值;氮肥在苗期、分枝期和初花期对苜蓿植株生长均有一定的促进作用;磷肥促进苜蓿主枝数的增加,氮钾肥有利于苜蓿侧枝数的生长。

关键词: 苜蓿, 田间试验, 播种量, 生长特性, 产草量

Abstract: The optimum application rates of nitrogen (N), phosphorus (P), potassium (K) and sowing rates on forage yield of alfalfa (Medicago sativa L.) were determined in this study. A randomized spilt-plot was designed with three replications. Results indicated that a maximum yield (22858.25 kg穐m-2) was obtained with N 23, P 113, K 68 kg穐m-2 fertilizers and 18.75 kg穐m-2 sowing rate in the field experiment of Yangzhou. Forage yields were improved by applying N, P, K fertilizer separately within proper application rates. N, P, K over-application was a negative influence on the forage quality of alfalfa. The limited levels of N and P fertilizers were 30 and 130 kg穐m-2. N fertilizer promoted plant growth at sowing stage, branching stage and initial flowering stage. P increased the number of branch. K increased the number of sub-branch.

Key words: Alfalfa, Field experiment, Sowing rates, Growth characteristics, Forage yields

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