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增加群体密度是玉米增产的有效措施之一,但密度过大会导致抗倒伏能力下降,空秆率、秃尖增加,株高、穗位提高,百粒重下降。不同品种因株型和生理特性不同,对密度存在不同反应,因此有必要对新育成品种开展密度试验,确定合理密度范围,以发挥品种最大的增产潜力。本试验对我院近年育成的3个新品种,在当地栽培条件下进行耐密性试验,以明确品种最佳密度范围,为新品种在农业生产上推广应用配套合理种植密度。
Increasing population density is one of the effective measures to increase yield of maize. However, excessive density leads to a decrease of lodging resistance, empty stalk rate, increase of baldness, plant height, ear location and decrease of 100 kernel weight. Different varieties due to different plant types and physiological characteristics, there are different responses to the density, it is necessary to develop new varieties of density test to determine the reasonable range of density in order to play the biggest varieties yield potential. In this experiment, three new varieties bred in our hospital in recent years, under the local cultivation conditions for tightness test to determine the optimal range of varieties for the promotion of new varieties of agricultural production and supporting the appropriate planting density.