【摘要】 为了掌握黄土高原中部地区旱作冬小麦粒重受生态气候因素的影响规律,科学开发利用气候资源,提高冬小麦生产效益,使用1995—2009年位于黄土高原中部旱作农业区的甘肃西峰试验田资料和当地平行气象观测资料,应用统计学原理和分析方法,较系统地分析了冬小麦千粒重与灌浆速率及灌浆时间之间的增长规律,探讨了生态气候综合因子对千粒重的影响特征。结果表明:灌浆速率对千粒重的贡献比率为69%,是灌浆时间贡献比率的2.23倍;千粒重和灌浆速率逐年变化为线性增加趋势,反映出生态气候因子对冬小麦生长表征为适宜有利限度内,单位面积产量仍有增加潜能;千粒重与生态气候因子的逐步回归分析表明,灌浆期降水量每增加10mm千粒重增加2.15g,≥20℃的活动积温每增加100℃千粒重减少2.7g,空气相对湿度每增大1%千粒重减少1.0g。更多还原

【Abstract】 The aims were to grasp the laws of ecological climatic factors on seed weight of winter wheat in dryland of the middle loess plateau, scientifically develop and utilize the climate resources, improve the productivity benefits of winter wheat. Based on experiment data at agro-meteorological experiment station of Xifeng, Gansu Province and meteorological data from 1995 to 2009, the relationship between TKW of wheat and grouting rate, spacing interval had been analyzed with statistics methods. The author found the characteristic of impact of synthetic eco-climatic factors on TKW. The result showed that the contribution rate of grouting rate for TKW was 69% and 2.23 times of that grouting spacing interval. It showed increasing trend of TKW and sprouting rate year by year indicated that variation of eco-climatic factors were still restricts to the suitable option. There still was range of increasing potential of yield per unit. It also showed that when the precipitation increased by 10 mm during the pustulation period, the TKW would be increased by 2.15 g. The active accumulated temperature increased by 100℃ , the TKW would be decreased by 2.7 g. The relative air humidity increased by 1%, the TKW would be decreased by 1.0 g.更多还原