播期对小麦新品种洛麦22生育规律影响研究

为了明确播期对‘洛麦22’的各项生育指标及发展规律的影响，进一步开发其高产潜力，加快新品种的示范推广，对其小麦的籽粒灌浆和分蘖成穗规律进行了研究。用Logistic方程对不同习性小麦品种的籽粒灌浆过程进行了拟合；结果表明：随着播期的推迟，‘洛麦22’在10月13日播种的灌浆时间长于11月2日和10月23日，灌浆速率V2a最大，所以灌浆中期是粒重增加较快的时期，10月13日的灌浆中期持续时间最长。‘洛麦22’主要依靠主茎和第一个、第二个一级分蘖成穗，随着播期的推迟，总分蘖数和成穗数逐渐减少。因此，‘洛麦22’最佳播期为10月13日左右，通过控制冬前无效分蘖的措施以实现高产的目的。

Sowing the Laws of ‘Luomai 22’ Wheat Impact Study

In order to clarify the sowing date on the various fertility indicators and the development of law in of ’Luomai 22’,the further development of its high yield potential,and to accelerate the demonstration and popularization of new varieties of wheat grain filling and tillering and panicle formation.Logistic equation during grain filling on different wheat varieties fitting.The results showed that,the delayed sowing,planting ’Luomai 22’ October 13 th filling time longer than 11 months,and October 23 rd,V 2a maximum filling rate,so the filling stage was grain weight increased rapidly from the longest duration of the filling stage on October 13 th.’Luomai 22’ mainly rely on the main stem and a second one on tillering and panicle with delayed sowing,the total number of tillers and ears gradually reduced.Therefore,the optimum sowing ’Luomai 22’ around October 13 th,measured of ineffective tillers in the control before winter in order to achieve a high yield.