播期对两类小麦群体发育和光合性能的影响

Influence of Sowing Time on the Growth and Photosynthesis of Two Wheat Groups

以河南省大面积播种的春性品种豫麦18、兰考矮早8,半冬性品种周麦18、豫麦49为实验材料,研究了不同播期对上述两类小麦群体发育、灌浆速率、光合性能、光能利用率、产量等方面的影响。结果表明:不同播期对小麦群体发育及产量构成因素的影响存在差异,春性品种豫麦18、兰考矮早8这两个品种在10月23日播种群体发育较好,数量较大,CAP、FV/Fo、Fv/Fm等光合参数等各项群体指标较优,光能利用率及产量最高。而周麦18、豫麦49这两个半冬性品种在10月15日播种上述各项群体指标较优,产量最高。

The experiment was conducted to optimize the sowing time of different population of Yumai 18, Lankaoaizao 8, Zhoumai 18, Yumai 49 in Henan, and to research the effect of different sowing time on photosynthetic function and filling rate, Solar energy utilization efficiency, yield of its population. The results indicate： Sowing time influence growth and yield of wheat distinctively. To get fairly good standard about CAP, FV/Fo, Fv/Fm, population amount and solar energy utilization efficiency of population of wheat and to get abundant harvest, Yumai 18 and Lankaoaizao 8（spring wheat） are proper to sow on about 23rd Oct., and about 15th Oct. is the suitable time for sowing Zhoumai 18 and Yumai 49 （winter wheat）.