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玉米极早熟和早熟品种适宜栽培密度高,育种和栽培试验中,其行端边际效应对产量结果真实性的影响要比中、晚熟品种大。针对其边际效应表达的特殊性,2010年实施极早熟与偏极早熟5品种、3密度试验,2011年实施极早熟2品种、5密度试验,探讨行端1~5株单株产量的边际效应及其对试验产量结果真实性的影响。试验表明,这种边际效应,随株序号增加而下降,随密度增加而增加,随行长缩短而增加。5m行长与8m行长相比,边际效应影响相对增加60.0%;小区两端临道,这种影响成倍增加。品种间行端边际效应差异显著。品种间边际效应影响的差异会影响品种间产量差异的真实性。
Maize extremely precocious and precocious varieties suitable for planting density, breeding and cultivation experiments, the end-of-line effect on the authenticity of the yield results than the late varieties of large. In view of the particularity of its marginal effect expression, we carried out the extremely precocious and the extremely precocious 5 cultivars and the 3 density test in 2010, the extremely precocious 2 cultivars and the 5 density test in 2011, and discussed the marginal effect of yield per plant of 1 to 5 lines And its impact on the authenticity of the test yield results. Experiments show that this marginal effect decreases with increasing plant number, increases with increasing density, and increases with decreasing length. Compared with 8m governor, 5m governor has a 60.0% increase in the effect of marginal effect; this effect is multiplied by a factor of two. The marginal effects of inter-species marginal differences significantly. Differences in marginal effects between cultivars will affect the authenticity of the differences in yield among varieties.