| 张伟,吕新,曹连莆.不同氮肥用量对棉花冠层结构光合作用和产量形成的影响[J].干旱地区农业研究,2005,(2):80~87 |
| 不同氮肥用量对棉花冠层结构光合作用和产量形成的影响 |
| Effects of the fertilizations at different N rates on canopy structure and yield formation of high-yield cotton in Xinjiang |
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| DOI：10.7606/j.issn.1000-7601.2005.02.17 |
| 中文关键词: 氮肥用量 棉花 冠层结构 光合作用 产量形成 |
| 英文关键词:nitrogen rates cotton canopy structure photosynthesis yield formation |
| 基金项目:国家自然科学基金资助项目(30160040) |
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| 摘要点击次数: 108 |
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| 中文摘要: |
| 讨论了北疆棉区推广棉种新陆早10号与新陆早12号在不同氮肥用量条件下冠层结构特征和光合特性的差异。试验结果表明:600～900kg/hm2氮肥用量是较为适宜的施氮水平,氮肥用量过高或过低都不利于形成理想群体冠层和获得高产。两品种相比,新陆早10号较新陆早12号对较高氮肥用量反应敏感。因此在较多氮肥用量条件下选择新陆早10号、中高氮肥用量条件下选择新陆早12号栽培种植较为适宜。叶面积指数升高,叶片平均倾斜角度减小,群体散射辐射透过系数和群体直射辐射透过系数降低,对光能的截获率增加,可以得出不同品种对不同施肥量的反应表现及理想群体冠层结构的合理指标。 |
| 英文摘要: |
| The differences between the canopy structure and photosynthetic characteristics of Xinluzao 10 and Xinluzao12, cotton varieties extended in north Xinjiang, were studied at different nitrogen rates and thus the fertilization at 600~900 kg nitrogen per hectare was obtained at the proper nitrogen rate. Comparatively, Xinluzao 10 was more sensitive to higher nitrogen rates than Xinluzao 12. And thus in cotton production, Xinluzao 10 would be adopted at higher nitrogen rates and Xinluzao 12 would be adopted at medium and high nitrogen rates. Increased leaf area indexes, decreased leaf obliquities, declined scattering and transmission coefficients of scattering and direct radiances, and elevated solar energy intercepting rates indicated that the responses to different fertilizer rates and the indexes of the optimal canopy structures of different varieties were the theoretical basis for increasing cotton yield. |
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