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合江地区年际间>10℃的活动积温变幅在450℃左右。低温早霜常常致使玉米产量显著下降,产量不稳。解决这个问题的根本途径是种植早熟、高产杂交种。本文主要依据我所(位于佳木斯市郊;属于省划定的第二热量带。)近年根据玉米育种的试验资料,就早熟指标,熟期和产量性状的遗传表现,以及早熟高产组合选配问
Hejiang area inter-annual> 10 ℃ accumulated temperature changes in about 450 ℃. Early frost often leads to a significant drop in maize yield and unstable yield. The fundamental way to solve this problem is to grow precocious and high-yielding hybrids. This article mainly based on our (located in the suburbs of Jiamusi; belong to the province of the second calorie zone.) In recent years, based on the corn breeding test data, early maturity indicators, maturity and yield traits of genetic performance, and early maturing high yield combinations