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用Richards方程对新春8号等6个春小麦品种籽粒灌浆过程进行拟合。对各品种的灌浆参数和速率曲线分析表明:新春6号、新春9号和Geleng为典型的强、弱势粒异步灌浆型品种;新春8号、宁春30号和新陇麦15为典型的强、弱势粒同步灌浆型品种。异步灌浆型品种强、弱势粒起始势之间差异较大,强势粒较弱势粒进入灌浆盛期早;同步灌浆型品种强、弱势粒起始势之间差异不大。灌浆过程的渐增期、快增期和缓增期3个阶段对总灌浆物质的贡献分别约占26％、45％和29％,但所需的时间在强、弱势粒和品种间有较大差异。渐增期灌浆速率与千粒重呈极显著负相关;快增期持续天数、缓增期灌浆速率和灌浆活跃期与千粒重呈极显著正相关;灌浆活跃期对千粒重的直接通径系数最大,延长灌浆活跃期对稳定和提高千粒重具有重要意义。
Richards equation was used to fit the grain filling process of 6 spring wheat varieties, such as New Year 8. The analysis of grain filling parameters and rate curves showed that: New Year 6, New Year 9 and Geleng were typical strong and weak grain asynchronous grouting varieties; New Year 8, Ningchun 30 and New Longmai 15 were typical strong , Weaker grain synchronous grouting type. There was a big difference between the initial filling potential of asynchronous grouting type and that of the weak bullet. The weaker bulking kernel entered the early filling stage of grouting. There was no significant difference between the initial grouting and the weak bulking kernel of synchronous grouting. The contribution of GFCs to total GMPs was about 26%, 45% and 29% respectively during the period of gradual increase, rapid increase and gradual increase of GFCs. However, the time required for GGRs was larger between strong and weak grains and cultivars difference. There was a significant negative correlation between grain filling rate and 1000-grain weight at increasing stage. The duration of fast growing period, grain filling rate and active grain filling stage at grain-filling stage were significantly and positively correlated with 1000-grain weight. The direct path coefficient at grain filling stage was the largest, The active phase is of great importance to stabilizing and improving the 1000-grain weight.