| 冬小麦不同生长类型群体超高产的中期栽培调控 |
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| 引用本文： | 许轲,张洪程,戴其根,霍中洋,桂玉清,邵世志,王志和,李春喜.冬小麦不同生长类型群体超高产的中期栽培调控[J].作物学报,2002,28(6):760-766. |
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| 作者姓名： | 许轲 张洪程 戴其根 霍中洋 桂玉清 邵世志 王志和 李春喜 |
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| 作者单位： | 扬州大学农学院,江苏扬州,225009 |
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| 基金项目： | 国家“九五”重中之重科技攻关招标项目 ( 95 -0 0 1-0 2 -0 2 )，农业部、江苏省共建作物栽培生理重点开放实验室资助项目 |
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| 摘 要： | 以黄淮冬麦区种植面积较大的普通小麦半冬性品种温麦6号(穗数型)、徐州25(中间型)为试验材料, 采用不同措施于拔节前形成群体规模和特征有较大差异且有代表性的大、中、小三类群体, 拔节后(即中期)对各类群体进行4种不同施氮量处理, 重点研究不同类型群体中期施氮肥的调控效应. 结果如下: 不同类型群体在中期因苗合理施氮可达
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| 关 键 词： | 小麦 中期 群体类型 调控 |
| 收稿时间： | 2001-09-10 |
| 修稿时间： | 2001年9月10日 |
Cultivation Regulation of Super-high-yield for Different Plant Population of Winter Wheat in Middle Growth Period |
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| Xu Ke,Zhang Hongcheng,Dai Qigen,Huo Zhongyang,Gui Yuqing,Shao Shizhi,Wang Zhihe,Li Chunxi.Cultivation Regulation of Super-high-yield for Different Plant Population of Winter Wheat in Middle Growth Period[J].Acta Agronomica Sinica,2002,28(6):760-766. |
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| Authors: | Xu Ke Zhang Hongcheng Dai Qigen Huo Zhongyang Gui Yuqing Shao Shizhi Wang Zhihe Li Chunxi |
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| Abstract: | Effects of four rates of nitrogen in middle growth period (from internode elongation to heading stages) on three representative plant populations, i.e. large (high density) and middle and small (low density) populations, were studied with two winter wheat cultivars Xuzhou25 and Wenmai6. The results indicated that the different populations could reach or approach super-high-yield (600 kg/667m 2) via reasonable nitrogen top dressing during the middle growth period. The regulation was not easy for the large population and it must be controlled, especial its growth scale in the late growth period. On basis of controlling LAI (source), the optimum capacity of sink and the higher ratio of grain to leaf area were main objectives. The middle oppulation was regulated easily and safely attained high yield potentiality. The sink capacity should be expanded when LAI was increased coordinately. The small population should be promoted strongly to raise the capacity of source and sink coordinately, especial the population amount. The middle population characterized higher intensity of nitrogen uptake, moderate nitrogen accumulation, higher nitrogen productivity, ratio of grain to leaf area and resulted in the stability of high yielding. |
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| Keywords: | Wheat Middle growth period Plant population Regulation |
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