【摘要】 基于2017/2018年度黄淮冬麦区田间试验观测数据,采用Logistic方程,对2个弱春性和6个半冬性冬小麦品种的籽粒灌浆过程进行拟合分析,研究千粒重与籽粒灌浆特性的关系。结果表明,半冬性品种的灌浆速率普遍高于弱春性品种,其灌浆中后期的高灌浆速率,显著提高了其千粒重;弱春性品种返青后生长较快,开花早,灌浆时间显著长于半冬性品种,但其平均灌浆速率和最大灌浆速率均显著低于半冬性品种。不同基因型品种的籽粒灌浆速率显著影响千粒重,而且灌浆中后期的灌浆速率与千粒重呈显著性正相关。虽然不同品种的灌浆持续时间有一定差异,但是灌浆持续时间对千粒重增加的影响不大。根据灌浆特征参数与千粒重的相关性分析,快增期和缓增期的灌浆速率对千粒重具有决定性作用,而与各阶段灌浆持续时间并无显著相关关系。综合可知,试验区域更适合种植推广商355、豫教5号和存麦1号等半冬性品种。更多还原

【Abstract】 Based on the field experimental data of winter wheat in 2017/2018, grain filling process was analyzed by logistic equation for 2 weak springiness varieties and 6 semi-winter varieties. Correlations on grain weight and grain filling characters were analyzed. The results showed that grain filling rate of semi-winter variety was generally larger than that of weak springiness variety. The 1000-grain weight was significantly increased by the higher grain filling rate at middle and late grain filling stage. The weak springiness varieties grow faster after reviving, bloomed earlier, and lasted longer in grain filling stage. However, the mean and maximum grain filling rates of weak springiness variety were significantly smaller than those of semi-winter variety. The 1000-grain weight was greatly influenced by grain filling rate, especially at middle and late grain filling stages. Although the grain filling duration of different genotype varieties was different, it had little effect on the increase of 1000-grain weight. According to the correlation analysis between grain filling parameters and 1000-grain weight, grain filling rate at quick-increase filling stage and slight-increase filling stage played the key roles. No significant correlation between grain filling duration at all stages and 1000-grain weight were found. It was concluded that the semi-winter varieties of S355, YJ5, and CM1 were more suitable for popularization in the experimental area.更多还原