黑龙江北部早熟区玉米增密试验

Maize Increasing Density Experiment in Early Maturity Area of Northern of Heilongjiang Province

为筛选出黑龙江北部早熟区耐密、高产的玉米品种,于2013-2015年开展玉米品种耐密性鉴定试验。结果表明:年际之间不同气候条件是影响增密试验结果的主要因素,增密条件下可使穗长等农艺性状产生规律性差异,此外,双密度关联分析更能准确评价品种耐密性,筛选出东农254、绿单2号、龙育11等玉米耐密高产品种,最后基于试验现状对进一步的试验及育种工作提出展望。

In order to select maize varieties with dense resistance and high yield for northern of Heilongjiang ear- ly maturing area, the identification test of maize varieties was carried out in 2013-2015. The results showed that different climatic conditions between years were the main factors affecting the results of density test. Under the condition of thickening, ear length and other agronomic traits could be regularized. The double density cor- relation analysis could more accurately evaluate the density tolerance of the breed. The tolerance close planting varieties were screened out,the Dongnong 254,I.yudan 2,Longyu 11. Based on the present situation of the ex periment,the prospect of further experiments and breeding were put forward.