玉米新品种宁单11号套种密度栽培技术研究

目的]研究宁单11号的优质高效栽培技术,为该品种的大面积推广提供理论依据。方法]在玉米和小麦套种模式下,采用单因子随机区组设计,设5个密度处理:45 0005、2 5006、0 0006、7 500和75 000株/hm2,3次重复。采用方差分析、相关分析等方法研究玉米新品种宁单11号套种密度与产量、空秆率、穗粒数、千粒重和植株性状的关系。结果]宁单11号小区产量与株高、穗位高、倒伏率、秃尖长呈负相关,与穗长、行粒数、百粒重呈正相关。宁单11号随着套种密度的增加,株高和穗位高不断增高,抗倒能力下降,秃尖长增加,穗粒数和千粒重降低。结论]在套种模式下,宁单11号在栽培密度在52 500~60 000株/hm2,可取得最高的产量。

Study on Cultivation Techniques of Interplanting Density of the New Corn Variety Ningdan 11

Objective] The study was to study the high quality and efficient cultivation techniques for Ningdan 11and provide the theoretical basis for its extension in large scale.Method] In the wheat and corn interplanting patterns with randomized block design of single factor and 3 repeated,5 density treatments such as 45 000,52 500,60 000,67 500 and 75 000 plants /hm2 were set up.The relationships of interpolating density and yields,bare plant rate,grain number per spike,1000-seed weight and plant characters of the new corn variety Ningdan 11 were studied with the method of variance analysis and correlation analysis.Result] The plot yield of Ningdan 11 had negative correlation with plant height,ear height,lodging percentage and bald tip length,and had positive correlation with ear length,row grains and 100-seed weight.With the increasing of the interpolating density of Ningdan 11,its plant height and ear height increased continuously,lodging resistance was decreased,bald tip length increased,and grain number per spike and 1000-seed weight decreased.Conclusion] The highest yields of Ningdan 11 could be obtained when the planting density was 52 500-60 000 plants/hm2 in the interplanting patterns.