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自“十一五”以来,本研究团队在东北中部以玉米抗逆丰产为主要目标,开展了大量试验研究,在3个方面取得了重要进展。(1)基于多年以兼备丰产性和抗逆稳产性品种为研究对象的密度试验结果,明确提出了东北中部春玉米大面积均衡增产的最佳密度;(2)基于玉米器官建成(干物质积累)、产量与茎秆发育特性对密度响应试验,明确了生产上常常出现的增加密度不增产甚至减产现象的深层原因,分析了产量形成与茎秆质量的关系,一定程度上揭示了高产与抗(茎)倒协同的调节机制;(3)基于不同生育期玉米品种、播种期及密度三因子互作试验,研究明确了不同生育期玉米品种产量及其主要构成因素对播种期与密度的响应,为春季不同降水年型玉米高产稳产提供了可行技术途径。
Since the Eleventh Five-Year Plan, our research team has conducted a large number of experimental studies focusing on the anti-bumper crop of corn in the central and northeastern part of Northeast China and made important progress in three aspects. (1) Based on the results of density test for many years with both high yield and resistant varieties, the optimal density of large-area and balanced yield increase of spring maize in middle northeastern China was clearly put forward. (2) Based on the density of dry matter accumulation ), Yield and stem development characteristics of the response to the density test, clear the production often appear to increase the density of the phenomenon does not increase or even reduce the production of the underlying causes of the formation of yield and quality of the relationship between stems, to some extent, reveals the high yield and resistance (Stem) down regulation; (3) Based on the three-factor interaction experiment of maize varieties, sowing date and density at different growth stages, the study determined the response of sowing date and density to the yield and its main components of maize varieties at different growth stages , Which provided a feasible technical approach for high yield and stable yield of annual maize with different precipitation in spring.