| 摘要: |
| 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。 |
| 关键词: 春小麦,生育规律,叶,分蘖,干物质积累,灌浆,陕西省 |
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| THE LAW OF GROWTH AND DEVELOPMENT OF SPRING WHEAT IN GUANZHONG REGION OF SHAANXI PROVINCE |
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Yan Shili Jiang Jiyun Pan Shilu Zhai Yunshi,Yan Shili Jiang Jiyun Pan Shilu Zhai Yunshi,Yan Shili Jiang Jiyun Pan Shilu Zhai Yunshi
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| Abstract: |
| Different spring wheat cultivars selected were cultivated in Guanzhong Region,Shaanxi Province in the years of 1978-1983.The results showed that whea sown in the first decade of Februrary,their harvest would be in the second decade of June with a growth period of 121.6-133.8 days and the accumulated temperatures of 1620.3-1822.4℃。The main stem has 7-9 leaves on the average.The stem leaf area was 5 times over the basal leaf area.The top leaves had more polyclic leaf pulp cell structures so that the photosynthetic efficiency was much higher.There was a good corresponding relationship between the main stem leafing and the spike differentiation.The period of tillering lasted about 20 days.The maximum leaf area index reached 5.5-7.0.There was a positive correlation between the amount of dry matter accumulation and the photosynthetic potential.The economic value was 36-41％.The milking was normal but grain weight was much affected by the weather conditions in the late developing stage with sunlight in particular. |
| Key words: Spring wheat,law of growth and development,leaf,tiller,dry matter accumulation,milking,Shaanxi Province |
