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以晚熟稀植型品种丹玉39和中晚熟密植型品种郑单958为试材,通过5年的定点栽培试验,对玉米株高在年际间的稳定性及其与产量的关系进行研究。结果表明,在不同年份环境条件下,玉米株高存在明显差异;株高形成期降水量是影响株高变化的根本原因,两者间呈显著的正相关关系;积温和日照时数各年均能够满足玉米株高生长发育需求,株高与两者无相关关系;在不同年份环境条件下玉米株高对密度的响应,因每年降水量多少及其分布而不同,在水分供应充足的年份,高秆稀植型品种随着密度加大而株高增加的趋势明显,而耐密植品种的反应相对较稳定。在株高与产量的关系上,不同耐密性品种之间也有所不同。
The late maturing cultivars DanYu 39 and middle and late-maturing close planting Zhengdan 958 were used as materials to study the stability of maize plant height and its relationship with grain yield through 5-year fixed-point cultivation experiment. The results showed that under different environmental conditions, there was a significant difference in plant height among the maize. Precipitation in the height of the plant height was the root cause of plant height variation. There was a significant positive correlation between the plant height and height. Can meet the growth and development needs of corn plant height, plant height and no correlation between the two; under different environmental conditions, the plant height and density of the response, due to the annual precipitation and the distribution of different, adequate supply of water in the year, High stalk and thin planting varieties with increasing density and plant height increased significantly, while the close planting varieties are relatively stable. In the relationship between plant height and yield, different density varieties are also different.