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当前位置: 首页 > 文章 > 棉花盛铃期不同器官氮磷化学计量特征及异速关系 棉花学报 2022 (1) 60-68
Position: Home > Articles > The stoichiometry and allometric relationship of nitrogen and phosphorus in different cotton organs at full-boll stage Cotton Science 2022 (1) 60-68

棉花盛铃期不同器官氮磷化学计量特征及异速关系

作  者：
李世梅;李自良;冯旭飞;向导;杨明凤;张旺锋;张亚黎
单  位：
石河子大学农学院/新疆生产建设兵团绿洲生态农业重点实验室;新疆乌兰乌苏农业气象试验站/乌兰乌苏国家综合气象观测专项试验外场
关键词：
棉花;器官;氮磷化学计量特征;异速指数
摘  要：
【目的】研究棉花器官水平氮（Nitrogen, N）、磷（Phosphorus, P）化学计量特征及其异速关系，为实现棉花协调生长和资源高效利用奠定理论基础。【方法】选取13个棉花材料（8个陆地棉和5个海岛棉）为研究对象，在盛铃期测定不同器官（根、茎、叶和棉铃）的N和P含量，分析各器官N、P化学计量特征及N-P异速关系的差异。【结果】叶和棉铃的N、P含量显著高于茎和根；棉铃的氮磷质量比（N∶P）最低。生殖器官（棉铃）与营养器官（根、茎和叶）N∶P化学计量调控存在差异，营养器官N∶P与P含量呈显著负相关，而生殖器官N∶P与N含量呈显著正相关。不同器官的N-P异速关系存在差异，叶与根中N-P含量呈异速积累，P含量积累速率快于N含量；茎与棉铃中N-P含量呈等速积累。与海岛棉比，陆地棉叶P含量显著较高，N∶P显著较低。陆地棉叶N∶P与P含量呈极显著负相关关系，海岛棉叶N∶P与N、P含量均呈显著负相关关系。陆地棉根、茎和叶的N-P异速指数低于海岛棉，异速常数略高于或与海岛棉相似。【结论】棉花各器官N、P化学计量特征受器官功能分化的影响，N∶P化学计量调控机制与N-P异速关系存在器官特异性。
译  名：
The stoichiometry and allometric relationship of nitrogen and phosphorus in different cotton organs at full-boll stage
作  者：
Li Shimei;Li Ziliang;Feng Xufei;Xiang Dao;Yang Mingfeng;Zhang Wangfeng;Zhang Yali;College of Agriculture, Shihezi University/The Key Laboratory of Oasis Ecology-Agriculture, Xinjiang Production and Construction Corps;Wulanwusu Agro-Meteorological Experiment Station of Xinjiang/Wulanwusu National Comprehensive Meteorological Observation Special Test Field;
关键词：
cotton;;organs;;nitrogen and phosphorus stoichiometry;;allometric exponent
摘  要：
[Objective] The stoichiometry and allometric relationship of nitrogen(N) and phosphorus(P) at organ level of cotton were studied, to lay a theoretical foundation for coordinated cotton growth and efficient utilization of resources. [Methods]The thirteen cultivated cotton varieties(eight G. hirsutum and five G. barbadense) were selected as the research materials. The contents of N and P in different organs(root, stem, leaf and boll) at full-boll stage were measured, to compare the stoichiometry and allometric relationship of N and P. [Results] N and P contents in leaf and boll were significantly higher than those in stem and root, respectively. The N:P of boll was the lowest. There were differences in N:P stoichiometric regulation between reproductive organ(boll) and vegetative organs(root, stem and leaf). The N:P was negatively correlated with the P content in vegetative organs, but it was positively related to N content in reproductive organ. The N-P allometric relationship differed in different organs. Allometric scaling relationship between N-P was observed in leaf and root, and the accumulation rate of P content was faster than that of N content, and isometric scaling relationship was found in stem and boll. Compared with G.barbadense, P content in G. hirsutum leaf was significantly higher, while N:P was significantly lower. The N:P was extremely significantly negatively related to P content in leaf of G. hirsutum, and N:P was significantly negatively related to both N and P content in leaf of G. barbadense. The N-P allometric scaling of root, stem and leaf of G. hirsutum was lower than those of G.barbadense, while the allometric constant was slightly higher or similar to that of G.barbadense. [Conclusion] The stoichiometric characteristics of N and P in cotton are affected by organ functional differentiation. The relationship between the regulation mechanism of N:P stoichiometry and N-P allometric relationship are organ specific.

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