不同氮素条件下稗草生物量生殖分配及生殖分株数量特征  

Biomass Allocation and Quantitative Characters of Echinochloa crusglli Beauv under Different Nitrogen Treatments

作　　者：郭伟[1] 潘星极[1] 孙备[1] 邓巍[1] 赵丽丽[1] 

机构地区：[1]沈阳农业大学农学院,沈阳110161

出　　处：《吉林农业大学学报》2011年第5期478-484,共7页Journal of Jilin Agricultural University

基　　金：辽宁省教育厅高等学校创新团队科研项目(2009T088);沈阳农业大学博士后基金项目

摘　　要：采用盆栽试验方法测定4个氮素施用量盆栽稗草[Echinochloa crusglli(L.)Beauv]3个生长时期的生物量、株丛高、分蘖数、千粒重等数量指标,分析了生物量分配的特点和生殖分株数量特征的动态变化。结果表明:在盛花期和结实期,随着施氮量的增加,植株总干重、各器官干重均表现为上升趋势;生物量分配变化随施氮量的增加,根、茎的分配呈下降趋势,叶和生殖器官呈上升趋势;总生物量、营养生物量、生殖生物量、株丛高、分蘖数和单株穗数与施氮量均呈显著正相关,而生殖分配与其无相关性;分蘖株株高与花序长度、总生物量、营养生物量和生殖生物量均呈线性正相关,而与生殖生长比例和生殖分配Ⅰ、Ⅱ无相关性。在结实期,N0、N3处理稗草表现较高的生殖分配比例。Echinochloa crusglli（L.） Beauv was processed with four nitrogen treatments.The biomass of its various organs,clump height,tiller number and 1000-grain weight were determined in 3 periods.The characteristics of biomass allocation and the dynamic changes of the quantitative characters of reproductive tiller were analyzed.The results indicated that： in either flowering or grain filling period,with the amount of nitrogen increased,total plant dry weight,dry weight of various organs increased.Total biomass,nutrition and reproductive biomass and the clump height,number of tillers and spike number per plant showed significantly positive correlation to the increase of nitrogen,but no correlation to the reproductive allocation was observed.The height of the tillers showed positive correlation to inflorescence length,total biomass,nutrition biomass and reproductive biomass,but negatively correlated with ratio of reproductive growth,reproductive allocationⅠand Ⅱ.In the grain filling period,higher reproductive allocation reacted to N0,N3.Reproductive tillers take different reproductive strategies to adapt the limited resources in different growth conditions.

关 键 词：稗草 氮素 生物量 生殖分配 生殖分株 

分 类 号：S451[农业科学—植物保护] Q948.1[生物学—植物学]