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草业学报 ›› 2022, Vol. 31 ›› Issue (10): 145-153.DOI: 10.11686/cyxb2022128

• 研究论文 • 上一篇    

间作比例和调亏灌溉对春小麦/紫花苜蓿间作中春小麦灌浆期旗叶性状的影响

周涛(), 牟乐, 苏楷淇, 张筠钰, 杨惠敏()   

  1. 兰州大学草地农业生态系统国家重点实验室,兰州大学草地农业科技学院,甘肃 兰州 730020
  • 收稿日期:2022-03-25 修回日期:2022-05-05 出版日期:2022-10-20 发布日期:2022-09-14
  • 通讯作者: 杨惠敏
  • 作者简介:E-mail: huimyang@lzu.edu.cn
    周涛(1998-),男,贵州遵义人,在读硕士。E-mail: zhout20@lzu.edu.cn
  • 基金资助:
    国家自然科学基金(32171679);国家现代农业产业技术体系-青藏高原牧草栽培(CARS-34)

Effects of intercropping ratio and regulated deficit irrigation on flag leaf traits of spring wheat at the grain filling stage in spring wheat-alfalfa intercropping

Tao ZHOU(), Le MU, Kai-qi SU, Jun-yu ZHANG, Hui-min YANG()   

  1. State Key Laboratory of Grassland Agro-Ecosystems,College of Pastoral Agriculture Science and Technology,Lanzhou University,Lanzhou 730020,China
  • Received:2022-03-25 Revised:2022-05-05 Online:2022-10-20 Published:2022-09-14
  • Contact: Hui-min YANG

摘要:

探讨不同间作比例下调亏灌溉对春小麦灌浆期旗叶性状的影响,进一步阐明豆科/禾本科间作优势,可为构建河西走廊地区适宜的粮草种植模式提供参考。设置春小麦单播(SW)、春小麦∶紫花苜蓿12∶4(12W4A)和8∶4(8W4A)的带状间作以及灌溉量为450(I450)、360(I360)、270(I270)和180 mm(I180)的水分梯度,通过测定灌浆期旗叶性状指标来分析间作下调亏灌溉对春小麦旗叶性状的影响。结果表明:1) 随灌溉量降低,春小麦旗叶的叶面积呈先增大后减小的趋势,在I360下达到最大值;而比叶重、叶氮浓度和叶绿素含量呈上升趋势,叶长宽比和叶干物质含量无明显变化。2) 总体上,春小麦旗叶面积表现为8W4A>12W4A,比叶重、叶氮浓度和叶绿素含量为12W4A>8W4A。12W4A的冠层结构下春小麦群体生长空间比例适宜,有利于旗叶光合同化作用的发挥。

关键词: 春小麦, 紫花苜蓿, 间作比例, 调亏灌溉, 旗叶, 叶性状

Abstract:

In order to elucidate the advantages of legume-grass intercropping and provide reference data for development of appropriate grain and forage production practice in the Hexi Corridor area of China, this research investigated the effects of intercropping ratio and regulated deficit irrigation on flag leaf traits of spring wheat (Triticum aestivum) at the grain filling stage. Two spring wheat-alfalfa (Medicago sativa) strip intercropping configurations were evaluated: 12 rows of spring wheat and 4 rows of alfalfa (12W4A) per strip and 8 rows of spring wheat and 4 rows of alfalfa (8W4A) per strip. Sole spring wheat was used as control. There were four irrigation treatments: 450 (I450), 360 (I360), 270 (I270) and 180 mm (I180). Flag leaf traits were measured at the grain filling stage to define the effects of intercropping ratio and regulated deficit irrigation on the flag leaf morphology and physiology of spring wheat. It was found that: 1) With the successive decreases in irrigation amount, flag leaf area of spring wheat tended to initially increase and then decrease, reaching a maximum at I360. The specific leaf weight, leaf nitrogen concentration and chlorophyll content showed an upward trend, while leaf length∶width and leaf dry matter content did not change significantly. 2) In general, flag leaf area of spring wheat ranked 8W4A>12W4A; Specific leaf weight, leaf nitrogen concentration and chlorophyll content ranked 12W4A>8W4A. The canopy structure under 12W4A provided a suitable spatial ratio for the growth of spring wheat plants, and was conducive to the photosynthetic assimilation of flag leaves.

Key words: spring wheat (Triticum aestivum), alfalfa (Medicago sativa), intercropping ratio, regulated deficit irrigation, flag leaf, leaf trait