山区玉米品种种植密度和施肥量研究

为了研究不同种植密度和施肥量对玉米新品种‘种都100’产量和农艺性状的影响，试验设置了42000、48000、60000株/hm² 3个密度梯度，复合肥和尿素各450、600、900 kg/hm² 3个施肥量水平，研究了玉米产量和农艺性状在不同种植密度和施肥量下的变化规律。结果表明，不同种植密度、施肥量及二者之间的互作效应，导致产量存在显著差异。‘种都100’的产量随着种植密度和施肥量的增加而增加，但是当密度和施肥量太高时，产量出现降低。农艺性状变化规律与产量变化有密切关系。在密度和施肥量互作效应下，‘种都100’在山区获得高产的最理想配置为密度48000株/hm²，基施复合肥600 kg/hm²，追施尿素600 kg/hm²，产量为7645.5 kg/hm²。该试验为‘种都100’在四川山区获得高产提供了科学依据。

Study on Planting Density and Fertilizer Rate of Hybrid Maize Cultivar Growing in Area

Cultivating a variety suitable for high density and increasing the planting density is a mainstream approach to increase the yield per hectare of corn. The yield and agronomic characters of a new hybrid maize cultivar Zhongdu 100 were studied by experiments with different planting density and fertilizer rate to determine the best combination, so as to provide theoretical basis for high yield in production practices. The results showed that the different planting density, fertilizing amount and their interaction make the output to have the very significant differences. Moderately increasing the density and fertilizer can increase production, which was to reduce when overdose. The density and fertilizer had obvious effects on the agronomic characteristics and the variation was related to yield of maize. Eventually, the optimal planting density and fertilizer rate of Zhongdu 100 planted in a mountainous area were 48000 per hectare, and compound fertilizer 600 kg and carbamide 600 kg per hectare, while the yield was 7645.5 kg/hm2.