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选用来源不同的春小麦品种于1978—1983年在关中种植结果表明,2月上旬播种,6月中旬成熟,生育期121.6一133.8天,积温1620.3—1822.4℃。主茎叶片数7—9片,茎生叶面积比基生叶大5倍以上。顶部叶片多环细胞多,光合效率高。主茎出叶与穗分化有良好对应关系。分蘖进程持续20天左右,最大叶面积系数以5.5—7为宜。干物质积累与光合势呈正相关,经济系数为36—41%。籽粒灌浆正常,但后期气候条件对粒重影响大,光照尤为重要。
The results of planting in different seasons of spring wheat from 1978 to 1983 showed that sowing in early February and maturing in mid June were from 121.6 days to 133.8 days and the accumulated temperature was 1620.3-1822.4 ℃. The number of main stem leaves 7-9 pieces, stem leaf area more than 5 times larger than the base leaf. The top leaves of polycystic cells, photosynthetic efficiency. The main stem leaves and spike differentiation have a good correspondence. Tillering process lasted about 20 days, the maximum leaf area coefficient of 5.5-7 is appropriate. Dry matter accumulation and photosynthesis positive correlation, the economic coefficient of 36-41%. Grain filling normal, but late climatic conditions on grain weight, light is particularly important.