摘要
研究了施氮量及施氮时期对无芒隐子草(Cleistengenes songorica)种子产量及产量构成因素的影响,以期为无芒隐子草种子规模化生产提供技术指导和数据支持。结果表明,施氮处理对无芒隐子草种子生产影响明显,随春季施氮量的增加,种子产量增加,春季施氮100kg·hm-2时无芒隐子草种子产量最大,达1 696.8kg·hm-2,较对照增加了106.7%,继续增加施氮量,种子产量降低。同时,施氮对无芒隐子草每平米生殖枝数和每小穗种子数影响明显,春季施氮100kg·hm-2,二者值均达最大,分别为3 075.77枝·m-2和40.53粒·小穗-1。无芒隐子草的种子产量主要受单位面积生殖枝数、每小穗种子数和千粒重的影响。
The present experiments were conducted to study the effects of different nitrogen application rate and periods on seed yield and yield components of Cleistengenes songorica in 2013.Seed yields of C.songoricasignificantly increased(P<0.05)with the increasing nitrogen application rate which maximized at 100 kg N·hm-2 application rate with 1 696.8kg·hm-2.Meanwhile,fertile tillers per unit area and seeds per spikelet were significantly influenced by nitrogen application rate which also maximized at100 kg N·hm-2 application rate with 3 075.77·m-2 and 40.53·spikelet-1,respectively.The number of fertile tillers per unit area was the most important component for seed yield.
出处
《草业科学》
CAS
CSCD
北大核心
2014年第9期1746-1751,共6页
Pratacultural Science
基金
国家重点基础研究发展计划(973计划)项目(2014CB138704
2007CB108904)
关键词
无芒隐子草
施氮
施氮时期
种子产量
产量构成因素
Cleistengenes songorica
nitrogen rate
nitrogen application time
seeds yield
yield components
