移栽密度对沿淮地区稻茬免耕油菜生长及产量的影响  

Effects of Transplanting Density on Growth and Yield of Rapeseed in No-tillage Paddy Rice Field in Huaihe River Valley

作　　者：杨安中[1] 段素梅[1] 

机构地区：[1]安徽科技学院植物科学学院,安徽凤阳233100

出　　处：《河南农业科学》2011年第9期52-54,共3页Journal of Henan Agricultural Sciences

基　　金：安徽省"十一五"重大科技攻关项目(09010301020);安徽科技学院重点学科项目(AKXK20101-1);蚌埠市科技计划项目(BB201005);安徽省教育厅优秀青年基金项目(2010SQRL096)

摘　　要：采用大田随机区组设计,研究了移栽密度对沿淮地区稻茬免耕移栽油菜生长及产量的影响。试验设A(6万株/hm2)、B(7.5万株/hm2)、C(9万株/hm2)、D(10.5万株/hm2)、E(12万株/hm2)5个移栽密度处理,以A处理为对照。结果表明:移栽密度对单株油菜苗的生长、干物质的积累、产量构成因素和产量均有不同程度的影响。随着移栽密度的增加,油菜主茎绿叶数、根茎粗、根系体积、单株干物质积累、一次有效分枝数、二次有效分枝数、单株角果数、每角粒数相对减少;株高、有效分枝高、千粒重则相对增加;主花序长度差异不显著。各处理产量表现为C>D>E>A>B,其中处理C产量最高,为2 409.5kg/hm2,较对照(2 156.7kg/hm2)增产11.72%;D处理次之,为2 407.9kg/hm2,较对照增产11.65%,C、D处理较对照增产均达到极显著水平。因此,沿淮地区稻茬免耕移栽油菜的适宜密度为9万～10.5万株/hm2。In the tield trials with randomized blocks design,the elIeCts oI transplanting uenslty on the growth and yield of rapeseed in no-tillage paddy rice field in the Huaihe River valley was studied. Five treatments,A（60000 plants/ha）, B（75000 plants/ha）, C（90000 plants/ha） ,D（105000 plants/ha） and E（120000 plants/ha） were used. The result indicated that the transplanting density had varying degrees effects on growth, dry matter accumulation, and yield. The green leaves on main stem, the diameter of root collar, root volume, dry matter accumulation content, primary branch number,number of primary branches per plant, number of secondary branches per plant, number of pods per plan and seed per pod relative decreased with the increase of transplanting density, and the plant height,the height of effective branches and 1000-seed weight increased accordingly. The topic inflorescence length on primary branches per plant had no significant difference . The yield order of each treatments was C〉D〉E〉A〉B. The yield of treat C was the most （2 409.5 kg/ha）,with 11.72% higher than the CK（2 156.7 kg/ha）,the second one was D （2 407.9 kg/ha） with 11.65% higher than the CK significantly,and the yield increase of treat C and D all reached exfremely significant level compared with CK. So the optimum density of the no-tillage paddy rice field rapeseed in the region along Huaihe River was 90000--105000 plants/ha.

关 键 词：油菜 免耕栽培 移栽密度 生长发育 产量 沿淮地区 

分 类 号：S565.4[农业科学—作物学]