摘要
密度与播期是影响玉米产量最主要的栽培因素。为探索石玉9号高产栽培的适宜密度和播期,2010~2011年设置了52 500株/hm2(A1)、60000株/hm2(A2)、67500株/hm2(A3)、75000株/hm2(A4)、82500株/hm2(A5)和90000株/hm2(A6)6个密度处理以及6月10日(B1)、6月15日(B2)、6月20日(B3)、6月25日(B4)、6月30日(B5)和7月5日(B6)6个播期处理,研究不同密度和播期处理对石玉9号产量的影响。结果表明:2010年和2011年石玉9号产量均随密度的加大呈先增加后降低趋势,分别在A4和A5处理下达到最高,均在A1处理下最低;6个密度处理的2 a平均产量顺序为A5>A4>A3>A6>A2>A1,其中,A4与A5处理差异不显著,但两者均极显著>其他处理。2010年和2011年石玉9号产量均随播期的推迟呈逐渐降低趋势;6个播期处理的2 a平均产量顺序为B1>B2>B3>B4>B5>B6,且不同播期处理的差异均达到了极显著水平。密度和播期均对玉米产量产生极显著影响,在冀中南地区石玉9号适宜密度为75000~82500株/hm2;适宜播期为6月10日,且不晚于6月25日,在茬口条件允许的情况下尽量早播。
The effects of planting density and sowing date on the yield of new maize variety Shiyu No. 9 were studied from 2010 to 2011. The results showed that with the increasing of planting density, the yield increased firstly then decreased, it reached the highest under the density of 75 000 plants/bin2 and 82 500 plants/hm2, while it was the lowest under the density of 52 500 plants/hm2. The order of the average yield under different densities was As 〉 A4 〉 A3 〉 A6 〉 A2 〉 A1. The average yield under 75 000 plants/hm2 had no significant difference with that under 82 500 plants/hm2, while they were very significantly higher than those under other densities. The yield decreased with the delay of sowing date. The order of the average yield sowed on different dates was Bj 〉 B2 〉 B3 〉 B4 〉 B5 〉 B6. The difference of yield sowed on six dates reached significant level. The planting density and sowing date influenced the yield significantly. The suitable planting density was 75 000 -82 500 plants/hm2 in the south centre of Hebei. The suitable sowing date was June 10. It should be sowed earlier under the suitable conditions of crops for rotation.
出处
《河北农业科学》
2012年第4期21-23,28,共4页
Journal of Hebei Agricultural Sciences
关键词
玉米
石玉9号
密度
播期
产量
Maize
Shiyu No. 9
Planting density
Sowing date
Yield