| Effect of nitrogen application on accumulation and transportation of photoassimilation and grain filling course |
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| DOI：10.7606/j.issn.1000-7601.2009.02.21 |
| Key Words: nitrogen application dry matter grain filling property accumulation and transportation |
| Author Name | Affiliation | | WU Qingli | College of Agronomy Northwest A＆F University,Yangling,Shaanxi 712100,China | | GAO Maosheng | College of forest Northwest A＆F University,Yangling,Shaanxi 712100,China | | LIAO Yuncheng | College of Agronomy Northwest A＆F University,Yangling,Shaanxi 712100,China | | WEN Xiaoxia | College of Agronomy Northwest A＆F University,Yangling,Shaanxi 712100,China |
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| Abstract: |
| Field experiment was conducted to investigate the effects of nitrogen application on accumulation and transportation of photoassimilation and characteristic of grain filling using winter wheat Xinong9814．The results indicated that the fitting nitrogen application （276kg／hm2） increased the flag leaf’s chlorophyll content and flag leaf’s net photosynthesis、the fitting nitrogen application not only enhance the transportation and transport efficiency of dry matter stored in vegetative organs before anthesis but also accelerate the dry matter stored in vegetative organs before anthesis transport to grain and increase the proportion of dry matter stored in vegetative organs before anthesis in grain enhance the speed of grain filling；On the contrary nitrogen over-application （345kg／hm2）decreased the flag leaf’s chlorophyll content and flag leaf’s net photosynthesis、restrained the transportation of dry matter stored in vegetative organs before anthesis to grain decreased the speed of grain filling and grain weight |
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