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中国农学通报 ›› 2020, Vol. 36 ›› Issue (29): 15-24.doi: 10.11924/j.issn.1000-6850.casb20190800546

所属专题: 小麦 农业气象

• 农学·农业基础科学 • 上一篇    下一篇

干旱胁迫下半干旱雨养区春小麦光响应曲线的拟合

杨阳1(), 马绎皓2, 王润元1, 齐月1, 张凯1   

  1. 1中国气象局兰州干旱气象研究所/甘肃省干旱气候变化与减灾重点实验室/中国气象局干旱气候变化与减灾重点开放实验室,兰州 730020
    2皋兰县气象局,甘肃皋兰 730200
  • 收稿日期:2019-08-16 修回日期:2020-03-19 出版日期:2020-10-15 发布日期:2020-10-16
  • 作者简介:杨阳,女,1992年出生,内蒙古锡林郭勒人,硕士,研究方向:农业气象。通信地址:730020 甘肃省兰州市城关区东岗东路2070号 中国气象局兰州干旱气象研究所,E-mail:yangyy120300@163.com,1251530512@qq.com
  • 基金资助:
    公益性行业(气象)科研专项(重大专项)“我国北方关键区域干旱致灾过程特征和机理的研究”(GYHY201506001-2);自然科学基金面上项目“半干旱区作物干旱致灾过程特征及其若干阈值研究”(41275118)

Simulation of Light Response Curve of Spring Wheat in Semi-arid Rainfed Area Under Drought Stress

Yang Yang1(), Ma Yihao2, Wang Runyuan1, Qi Yue1, Zhang Kai1   

  1. 1Lanzhou Institute of Arid Meteorological, China Meteorological Administration, Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province, Key Open Laboratory of Arid Climate Change and Disaster Reduction of CMA, Lanzhou 730020
    2 Gaolan County Meteorological Bureau, Gaolan Gansu 730200
  • Received:2019-08-16 Revised:2020-03-19 Online:2020-10-15 Published:2020-10-16

摘要:

为揭示半干旱雨养区干旱胁迫对春小麦光响应模型的适应性,通过对4种光响应曲线模型的分析比较,探讨干旱胁迫对春小麦光响应模型的适用性。结果表明:持续干旱胁迫明显降低春小麦叶片的净光合速率,而生育后期的复水使得T1、T2处理出现了超补偿效应。各模型下的光响应参数拟合结果显示,最大净光合速率在指数模型的模拟效果最好,光补偿点在直角双曲线修正模型中拟合效果最好,暗呼吸速率在指数模型的拟合效果最好。4种模型中直角双曲线修正模型模拟效果最好。综上所述,干旱胁迫明显降低春小麦叶片的光合能力,降低小麦叶肉细胞的光合活性,而胁迫后期的复水使得T1、T2处理小麦叶片的光合能力得以恢复,出现了超补偿效应。

关键词: 春小麦, 光响应曲线, 光响应模型, 干旱胁迫, 半干旱雨养区

Abstract:

To reveal the adaptability of drought stress in semi-arid rainfed areas to spring wheat light response model, through the analysis and comparison of four kinds of light response curve models, the applicability of drought stress to the spring wheat light response model was discussed. The results showed that continuous drought stress significantly reduced the net photosynthetic rate of spring wheat leaves, and the rehydration in the late stage of reproductive growth caused the over-compensation effect of T1 and T2 treatment. The fitting results of the light response parameters under each model showed that the maximum net photosynthetic rate had the best simulation effect in the exponential model, the light compensation point had the best fitting effect in the right angle hyperbolic correction model, and the dark breathing rate had the best fitting effect in the exponential model. The right angle hyperbolic correction model in the four models had the best simulation results. In summary, drought stress significantly reduced the photosynthetic capacity of spring wheat leaves and decreased the photosynthetic activity of wheat mesophyll cells, however, the hydration in the late stage of stress caused the photosynthetic capacity of T1 and T2 treated wheat leaves to recover, and the overcompensation effect appeared.

Key words: spring wheat, light response curve, light response model, drought stress, semi-arid rainfed area

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