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棉花学报 ›› 2022, Vol. 34 ›› Issue (1): 60-68.doi: 10.11963/cs20210069

• 研究简报 • 上一篇    下一篇

棉花盛铃期不同器官氮磷化学计量特征及异速关系

李世梅1(),李自良1,冯旭飞1,向导2,杨明凤2,张旺锋1,张亚黎1,*()   

  1. 1.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 石河子 832003
    2.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,新疆 乌兰乌苏 832199
  • 收稿日期:2021-12-06 出版日期:2022-01-15 发布日期:2022-05-31
  • 通讯作者: 张亚黎 E-mail:1821315614@qq.com;zhangyalicn@foxmail.com
  • 作者简介:李世梅(1995―),女,硕士研究生, 1821315614@qq.com
  • 基金资助:
    国家自然科学基金新疆联合基金(U1803234)

The stoichiometry and allometric relationship of nitrogen and phosphorus in different cotton organs at full-boll stage

Li Shimei1(),Li Ziliang1,Feng Xufei1,Xiang Dao2,Yang Mingfeng2,Zhang Wangfeng1,Zhang Yali1,*()   

  1. 1. College of Agriculture, Shihezi University/The Key Laboratory of Oasis Ecology-Agriculture, Xinjiang Production and Construction Corps, Shihezi, Xinjiang 832003, China
    2. Wulanwusu Agro-Meteorological Experiment Station of Xinjiang/Wulanwusu National Comprehensive Meteorological Observation Special Test Field, Wulanwusu, Xinjiang 832199, China
  • Received:2021-12-06 Online:2022-01-15 Published:2022-05-31
  • Contact: Zhang Yali E-mail:1821315614@qq.com;zhangyalicn@foxmail.com

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。

关键词: 棉花; 器官; 氮磷化学计量特征; 异速指数

Abstract:

[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.

Key words: cotton; organs; nitrogen and phosphorus stoichiometry; allometric exponent