【摘要】 试验为选取有效耕作方式及合理种植密度指导玉米生产,采用裂区设计方法,主区为耕作方式,副区为密度,以‘德美亚3’为试验材料,研究不同耕作方式和密度对玉米的产量、产量构成因素及主要农艺性状的影响。结果表明:相同密度下,免耕平作(T1)玉米产量高于秋翻平作(T2)和传统垄作(T3),前两者差异不显著,与后者产量差异达极显著水平;相同耕作方式下,随着密度的增加产量呈先增再降的趋势,D2处理产量最高,与D3差异不显著,D2、D3处理大于D1处理,但与D1处理差异达到极显著水平;相同密度下,免耕平作处理穗粒数、穗粒重最高,倒伏率、空秆率较低。通过本试验,得出以下结论:(1)免耕优于传统垄作和秋翻平作;(2)T2D2组合处理产量最高。更多还原

【Abstract】 The experiment was conducted to guide the corn production by choosing effective cultivation modeand reasonable planting density. Split block design was used for cultivation mode in main plot and plantingdensity in subplot.‘Demeiya3’was used as test material to study the effects of cultivation modes and plantingdensities on corn yield, yield components and main agronomic traits. The results showed under the sameplanting density, the yield of T1 treatment was higher than that of T2 and T3 treatments, the yield differencebetween T1 and T2 was not significant, but was greatly significant between T1 and T3. Under the samecultivation mode, the yield firstly increased, then decreased with the density increase and the D2 treatmenthad the highest yield, the difference between D1 and D2, D3 was significant, the difference between D2 andD3 was not significant. Under the same planting density, T1 treatment had the highest grain number per spike,grain weight per spike and the lowest lodging rate and empty stalk rate. Through the experiment, conclusionswere obtained:(1) T1 was better than T2 and T3;(2) yield under T2D2 treatment was the highest in ourexperiment.更多还原