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扬稻 6号营养生长期长 ,在播栽期推迟的情况下 ,营养生长期仍较为稳定。但早播有利于大穗发育 ,千粒重、结实率增加 ,产量提高。随播栽期推迟 ,所需有效积温增加。江苏沿江一带 5月 31日以后播种 ,齐穗期将推迟到 9月 16日以后 ,迟于本地区安全抽穗期 ,结实率、千粒重降低 ,减产显著。大面积生产播种期一般不宜迟于 5月 2 0日
Yangdao 6 long vegetative growth period, the delay in the sowing period, the vegetative growth period is still relatively stable. However, early sowing is conducive to the development of large ears, grain weight, seed setting rate increased, yield increased. Postponed with the sowing date, the required effective accumulated temperature increased. After the May 31st planting along the Yangtze River in Jiangsu Province, the heading date will be postponed until September 16, later than the safe heading date in the region. The seed setting rate and grain weight will be reduced, and the yield will be significantly reduced. Large-scale production seeding period generally should not be later than May 20