行距与播种量对无芒雀麦生产性状的影响  

Impacts of row spacing and sowing rate on production characteristics of Bromus inermis

作　　者：吴菲菲[1] 张永亮[2] 王显国[1] 

机构地区：[1]中国农业大学草地研究所,北京100094 [2]内蒙古民族大学农学院,内蒙古通辽208042

出　　处：《草业科学》2013年第1期91-95,共5页Pratacultural Science

基　　金：国家牧草产业体系项目(CARS-35);国家科技支撑子课题(2011BAD17B01-02);内蒙古民族大学科研创新团队建设计划项目(NMD10-03)

摘　　要：采取二因素随机区组试验,分析不同行距(30、50、70和90cm)与播种量(0.46、0.77和1.08g.m-2)对无芒雀麦(Bromus inermis)群体株高、生殖蘖数、营养蘖数、总分蘖数、地上生物量、叶面积指数(LAI)和冠层底部光合有效辐射(PAR)的影响,旨在为无芒雀麦种子生产提供理论依据。结果表明,行距对无芒雀麦群落特性具有显著影响(P<0.05)。随着行距的增加,株高和PAR呈上升趋势,其余指标呈下降趋势。30cm行距处理的生殖蘖数、营养蘖数、总分蘖数和LAI显著高于70和90cm行距处理(P<0.05),而PAR显著低于50、70和90cm行距处理(P<0.05)。播种量对LAI和PAR的影响显著,对株高、生殖蘖数、营养蘖数、总分蘖数和地上生物量没有显著影响。生殖蘖数、营养蘖数、总分蘖数与LAI呈极显著正相关(P<0.01),与PAR呈显著负相关(P<0.05)。12个播种组合处理可聚合成窄行距类与宽行距类两类,类之间群落特性差异显著。Impacts of row spacing and sowing rate on plant height, numer of fertile tillers, numer of vege-tative tillers,number of total tillers, aboveground biomass, LAI and PAR of Bromus inermis population were studied by randomized block experiment. The results showed that row spacing had obvious effects on population characteristics（P〈0.05）. As row spacing increased, the plant height and PAR of B. inermis popui tiller, ation presented a rising tendency and other index showed a decreasing tendency. The numer of fertile numer of vegetative shoot, numer of total tiller and LAI of 30 cm row spacing treatments were much higher than those in 70 cm and 90 cm row spacing treatments（P〈0.01）, while PAR was significantly low-er than those in 50 cm, 70 cm and 90 cm row spacing treatments（P〈0.01）. There was a significant impact of sowing rate on LAI and PAR and was no obvious impact of sowing rate on plant height, numer of fertile tiller, numer of vegetative shoot,numer of total tiller and aboveground biomass. The numer of fertile till-er, numer of vegetative shoot and numer of total tiller were significantly positive correlation with LAI（P〈0.01） and were significantly negative correlation with PAR（P〈0.05）. Twelve sowing treatments were classified as two types of narrow row space and wide row space, and there were significant differences in the community characteristics between narrow row space type and wide row space type.

关 键 词：无芒雀麦 叶面积指数 光合有效辐射 群落特性 聚类分析 

分 类 号：S543.8[农业科学—作物学]