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| 施氮对蓝茎冰草种子产量及产量组分的影响 | |
| 引用本文： | 孙铁军,李艳梅,韩建国.施氮对蓝茎冰草种子产量及产量组分的影响[J].中国草地学报,2006,28(2):33-38. |
| 作者姓名： | 孙铁军 李艳梅 韩建国 |
| 作者单位： | 1. 北京草业与环境研究发展中心,北京,100089 2. 北京市盲人学校,北京,100089 3. 中国农业大学草地研究所,农业部草地植被恢复与重建重点开放实验室,北京,100094 |
| 基金项目： | 北京市科技新星计划项目;北京市重点实验室基金 |
| 摘 要： | 以蓝茎冰草为实验材料，经过2年研究表明：随着施氮量增加，蓝茎冰草种子产量增加；同一施氯量下，秋春分施氮肥处理的种子产量高于春季1次施氮处理，其中秋施45kgN／hm^2、春施90kgN／hm^2时，种子产量最高。达341．4kg／hm^2；单位面积生殖枝数是影响蓝茎冰草种子产量的主要组分，其生殖枝主要由上年果后短营养枝转化；连续2年施氮使单位面积生殖枝数显著增加，秋施45kgN／hm^2、春施90kgN／hm^2时，生殖枝数／m^2最多，达232．3枝；秋施90kgN／hm^2、春施90kgN／hm^2时，小穗数／生殖枝与种子千粒重最高，为11．2个和4．857g。 |
| 关 键 词： | 蓝茎冰草 种子产量 生殖枝 施氮 |
| 文章编号： | 1673-5021（2006）02-0033-06 |
| 收稿时间： | 2005-11-28 |
| 修稿时间： | 2005-11-282006-02-27 |
Effect of Nitrogen Application on Seed Yield and Yield Components of Agropyron smithii |
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| SUN Tie-jun,LI Yan-mei,HAN Jian-guo.Effect of Nitrogen Application on Seed Yield and Yield Components of Agropyron smithii[J].Chinese Journal of Grassland,2006,28(2):33-38. | |
| Authors: | SUN Tie-jun LI Yan-mei HAN Jian-guo |
| Institution: | 1. Beijing Research and Development Center for Grass and Environment, Beijing 100089, China; 2. Beij ing School for the Blind, Beij ing 100089, China; 3. Institute of Grassland Science, China Agricultural University/Key Laboratory of Grassland Vegetation Restoration and Reconstruction, MOA, Beijing 100094, China |
| Abstract: | The experiments of nitrogen(N) application were conducted with Agropyron smithii to study the effect of nitrogen application on seed yield and yield components of Agropyron smithii in 2002 and 2003. Seed yield of Agropyron smithii was improved significantly with increase of N application rate.In the same amount of N application,seed yield when applying N in autumn and spring was higher than that only in spring,and the highest was 341.4kg/hm~2 at application rate of 45kgN/hm~2 in autumn and 90 kgN/hm~2 in spring.The number of fertile tillers per unit area was the most important for seed yield in all the yield components,and they developed mainly from short vegetative shoots after fruit last year.Fertile tillers/m~2 increased after applying N for two years and the highest was 232.3 at the application rate of 45kgN/hm~2 in autumn and 90 kgN/hm~2 in spring.Spikelets/fertile tiller and thousand-seed weight were 11.2 and 4.857 g at the application rate of 90kgN/hm~2 in autumn and 90 kgN/hm~2 in spring. |
| Keywords: | Agropyron smithii Seed yield Fertile tillers Nitrogen application |
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