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本试验研究分析了小麦不同生态型品种在杭州气候条件下分期播种对生育特性的影响.3年试验结果表明,自10月8日至2月8日播种的,均能正常抽穗结实,而以前三期播种的生长期较长、差异较小;冬性、半冬性和春性品种在3月8日,4月8日和5月21日后播种的不能正常开花结实,而强春性品种则部分能开花结实。春夏播的冬性品种幼穗分化停止在单棱期至二棱期.在不同的生育阶段中,播种至出苗、出苗至三叶和拔节至抽穗基本是积温效应,分别为100—150℃、100—130℃、和450—550℃,抽穗至开花的天数取决于抽穗后的外界温度,日平均气温如<20℃则延迟开花:开花至成熟的天数与>25℃的气温呈显著的负相关.三叶至拔节是各生态型品种对外界温、光反应差异最大的时期,较高的温度可缩短春性品种三叶至拔节的天数,而冬性品种则延长.
In this study, the effects of staged sowing of different ecotypes of wheat on growth characteristics under Hangzhou climatic conditions were analyzed.The results of the three years showed that all the wheat seeds were sowed from Oct. 8 to Feb. 8, The sowing date of the third seeding was longer and the difference was smaller. The winter, semi-winter and spring seasons could not normally flowering and fruiting after sowing on March 8, April 8 and May 21, Some can flowering strong. The differentiation of young spikelets in spring and summer seasons stopped from single-ridged to double-ridged, and in different stages of growth, the effects of seeding to emergence, emergence to trefoil and jointing to heading were basically accumulated temperature effects, which were 100-150 ℃ , 100-130 ° C, and 450-550 ° C. The number of days from heading to flowering is dependent on the outside temperature after heading. The daily average temperature is less than 20 ° C, but the flowering is delayed: the days from flowering to ripening are significantly higher than those at> 25 ° C Negative correlation.Clover to jointing is the ecotypes of the outside world temperature and light response to the greatest difference between the period of higher temperatures can reduce spring clover to join the number of days, while winter varieties are extended.