种植密度对京冬8号和济麦22单株生产力和产量的影响  

Effects of Seedling Rate on Plant Productivity and Grain Yield of Jingdong 8 and Jimai 22

作　　者：杨树宗 刘玲敏 张敏[2] 王文颇[2] 武宝悦[2] 周印富[2] 李彦生[2] 蔡瑞国[2] 

机构地区：[1]遵化市农业畜牧水产局,河北遵化064200 [2]河北科技师范学院生命科技学院 [3]河北省鸡泽县职业教育中心

出　　处：《河北科技师范学院学报》2013年第4期20-24,共5页Journal of Hebei Normal University of Science & Technology

基　　金："十二五"农村领域国家科技计划项目(项目编号:2011BAD16B08);河北省科技支撑计划项目(项目编号:12220202D-2);河北省自然科学基金项目(项目编号:C2011407011);唐山市科技支撑项目(项目编号:12120202A);河北科技师范学院博士基金项目(项目编号:2009YB006)

摘　　要：为确定冀东地区小麦种植密度对单株生产力和产量的影响,选用京冬8号和济麦22为供试材料,设计4个种植密度水平(基本苗数量分别为300万,450万,600万,750万株/hm2),在大田条件下研究了种植密度对小麦单株生产力和产量的影响。结果表明:在本试验条件下,随密度的增加小麦单株穗数、单株穗粒数、单株干物质积累和经济系数均呈降低趋势,导致小麦单株产量随密度增大而呈下降趋势。京冬8号群体产量随着密度的增加而逐渐增加,在基本苗数量750万株/hm2下产量最高。济麦22随着密度的增加群体产量呈单峰曲线变化,在基本苗数量600万株/hm2下产量最高。综上可见,随种植密度的增大,小麦单株生产力呈下降趋势,而群体产量呈先增大后下降的趋势。In order to provide a theoretical basis of wheat high-yield in eastern area of Heibei province, the study selected two wheat cultivars ： Jingdong 8 and Jimai 22, and set four seedling rates （3.0, 4.5, 6.0 and 7.5 million seedlings per hm2 ） to investigate the effects of sowing density on plant yield potential. The results showed that spike number and dry matter accumulation per plant, grain number, and economic coefficient de- clined with the increase of seedling rate. In the conditions of this study, grain yield per plant decreased, while yield per m2 exist differences between the two cultivars. To Jimai 22, yield per m2 showed an unimodal curve with the seedling rate increase and reached the highest yield at 6.0 million seedlings per hm~. However, yield per ms of Jingdong 8 enhanced with the increase of seedling rate. In conclusion, with the increasing of seed- ling rate, single wheat plant productivity decreased, while grain yield of wheat stand increased firstly and then decreased.

关 键 词：冬小麦 种植密度 单株生产力 籽粒产量 

分 类 号：S512.01[农业科学—作物学]