小麦籽粒灌浆特性分析

Analysis on grain filling characteristics of wheat variety

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了拟合。结果表明,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,强势粒进入灌浆盛期较弱势粒早;同步灌浆型品种强、弱势粒起始势之间差异不大。灌浆过程的前期、中期和后期3个阶段对总灌浆物质的贡献分别约占26％,45％, 29％,但所需的时间在强、弱势粒和品种间有较大差异。

The Richards equation was used to describe grain filling processes of six Spring wheat varieties including Xinchun 8. The determinations of all fitted equations were very high. Analysis of parameters revealed grain-filling characteristics of the wheats. These wheat varieties had different grain sizes, grain filling rates and gaps between superior and inferior grain positions. Xinchun 6,Xinchun 9 and Geleng were typical asynchronous type^but Xinchun 8,Ningchun 30 and Xinlongmai 15 were typical synchronous ones. The differences of R0 of asynchronous between superior and inferior grain positions were significant,and its vigorous filling phase was early. However,the differences of R0 of synchronous between superior and inferior grain positions were not significant. Three stages of grain filling contributed about 26% ,45%,29% of the final dry weight respectively,But the time needs for three stages were variant for grain positions among wheats.