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1983—1985年在河北省邯郸地区,对不同类型小麦品种进行播种期试验所得结果指出:(1)播种期对小麦生育期的影响主要表现在营养生长阶段;(2)主茎冬前叶片数随播种期的推迟而减少,春生叶片数则略呈增加趋势,小麦每出生一叶,平均需≥0℃积温87℃左右;(3)不论播种期早晚,达到一定积温,幼苗长到一定叶龄,生长锥都能进入伸长期和单棱期,但没有一定低温不能进入二棱期,生长锥能否进入二棱期是发育成穗的关键;(4)小麦越冬死亡率与生长锥距地表深浅关系密切;(5)本文还论述了小麦不同类型品种的适宜播种期问题。
The results of sowing experiments on different types of wheat cultivars in Handan area of Hebei province from 1983 to 1985 indicated that: (1) the effect of sowing period on the growth period of wheat was mainly in vegetative growth stage; (2) With the delay of sowing, the number of leaves in spring was slightly increased. When leaves were born, the average temperature of the leaves was ≥0 ℃. The accumulative temperature was about 87 ℃. (3) The seedlings grew to some extent regardless of the sowing date Age, growth cone can enter the elongation phase and single-ridge period, but not some low-temperature can not enter the two-edge phase, the growth cone can enter the second-phase is the key to the development of the ear; (4) The winter wheat overwintering mortality and growth cone The depth of the surface is closely related; (5) This article also discusses the appropriate sowing date of different types of wheat varieties.