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本文以11250公斤产量水平的高产夏玉米为研究对象,研究了山东西部、中部、东部地区乃至全省范围内有关群体光合性能、产量构成因素及产量与播期的关系。结果表明大口期以后,群体叶面积系数、光合势和总光合势与播期呈显著正相关;开花期以后,各生育期干物质积累随播期的推迟递减;大口期以后各生育阶段,干物质积累强度与播期呈正相关。全省范围内,穗粒数、千粒重、产量均随播期推迟递减。西部、中部、东部三个区域比较,播期对穗粒数的影响程度,西部和东部明显高于中部;播期对千粒重的影响程度,自西向东依次递减;播期对产量的影响程度,西部明显高于中部和东部。夏玉米掖单4号公顷产11250公斤的播期下限,西部为6月14日,中部为6月7日,东部为6月3日。
In this paper, 11250 kg of high-yielding summer maize was chosen as the research object to study the relationship between photosynthesis, yield components and yield and sowing date of the related groups in western, central, eastern Shandong Province and even the province. The results showed that the leaf area coefficient, photosynthetic potential and total photosynthetic potential were significantly and positively correlated with sowing date after the large-mouth stage. After the flowering stage, the dry matter accumulation at each growth stage was delayed with sowing date. After the big mouth stage, The material accumulation intensity was positively correlated with the sowing date. Within the province, the number of grain per spike, grain weight and grain yield all decreased with sowing date. The effect of sowing date on grains per spike was significantly higher in western and eastern part than in central part. The influence degree of sowing date on 1000-grain weight was decreasing from west to east. The influence of sowing date on grain yield, The western part is obviously higher than the central part and the eastern part. Summer corn Yedan 4 hectares yield 11,250 kilograms of sowing time limit, the western June 14, the central on June 7, the eastern part of June 3.