Journal of Integrative Agriculture

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微喷灌和播后镇压对淮北平原冬小麦产量及水分利用效率的影响

  

Effects of micro-sprinkler irrigation and topsoil compaction on winter wheat grain yield and water use efficiency in the Huaibei Plain

Jinpeng Li1, Siqi Wang1, Zhongwei Li1, Kaiyi Xing1, Xuefeng Tao1, Zhimin Wang2, Yinghua Zhang2, Chunsheng Yao1#, Jincai Li1#   

  1. 1 School of Agronomy, Anhui Agricultural University, Hefei 230036, China

    2 College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China

  • About author:Jinpeng Li, E-mail: jinpeng0103@126.com; #Correspondence Chunsheng Yao, E-mail: chunsheng@ahau.edu.cn; Jincai Li, E-mail: ljc5122423@126.com
  • Supported by:

    We sincerely appreciate the funding from the Scientific Research Program of the Higher Educational Institutions in Anhui Province, China (2023AH050986), the National Key Research and Development Program of China (2023YFD2301500), the National Natural Science Foundation of China (32001474) and the Talent Introduction Project of Anhui Agricultural University (rc312212, yj2019-01).

摘要:

提高淮北平原冬小麦的产量(GY)和水分利用效率(WUE)至关重要。然而,微喷灌和播后镇压对小麦产量和水分利用效率的影响尚不清楚。因此,本研究于2021-2023年冬小麦生长季开展了为期两年的大田试验,共设置六个处理:雨养(RF)、常规灌溉(CI)和微喷灌(MI),以及三种灌溉方式下播种后镇压处理(RFCCICMIC)。试验结果表明,与CIRF相比,微喷灌显著提高了小麦GY,平均增产幅度分别为17.9%42.1%MI产量提高是由于其显著增加了穗数、穗粒数和粒重。MI处理下冬小麦花后旗叶叶绿素含量显著高于CIRF处理,RF下叶绿素含量最低。这是因为MI显著提高了旗叶花后过氧化氢酶和过氧化物酶活性,降低丙二醛含量。与RFCI相比,MI显著促进了花后干物质转运和积累及其对籽粒产量的贡献率。此外,MI显著促进了小麦根系生长,且灌浆期根系活力显著高于CIRF处理。在2021-2022年,MIRFWUE之间无显著差异,但在2022-2023年,RFWUE显著低于MI。然而,与CI相比,MIWUE显著提高,两年平均提高了15.1%17.6%。在雨养条件下,播后镇压显著提高了小麦GYWUE,这主要是由于播后镇压显著增加穗数和干物质积累量。综上所述,在淮北平原地区,雨养条件采用播后镇压可以作为一种提高小麦产量和水分利用效率的有效措施;而采用微喷灌可同时实现该地区小麦高产和水分高效利用的生产目标

Abstract:

Increasing grain yield (GY) and water use efficiency (WUE) of winter wheat in the Huaibei Plain (HP) is essential.  However, the effects of micro-sprinkler irrigation and topsoil compaction after wheat seeds sowing on the GY and WUE are unclear.  Therefore, a two-year field experiment was conducted during the 2021–2023 winter wheat growing seasons with a total six treatments: rain-fed (RF), conventional irrigation (CI) and micro-sprinkler irrigation (MI), as well as topsoil compaction after seeds sowing under three irrigation methods (RFC, CIC, and MIC).  The two years’ results indicated that MI significantly increased GY compared to CI and RF, which averagely increased by 17.9 and 42.1%, respectively.  The increase in GY of MI was due to its significant increase in the number of spikes, kernels per spike, and grain weight.  Chlorophyll concentration in flag leaves of MI after anthesis stage was maintained higher levels than CI and RF, RF was the lowest.  This was due to the dramatically enhanced catalase and peroxidase activity and lower malondialdehyde content under MI.  Compared with RF and CI, MI significantly promoted dry matter remobilization and production after anthesis as well as its contribution to GY.  In addition, MI significantly boosted root growth, and root activity during grain filling stage was remarkably enhanced than CI and RF.  In 2021–2022, there was no significant difference in WUE between MI and RF, but the WUE of RF was significantly lower than MI in 2022–2023.  However, WUE in MI was significantly improved compared to CI, that averagely increased by 15.1 and 17.6% for the two years.  Topsoil compaction significantly increased GY and WUE under rain-fed conditions due to improved spike numbers and dry matter production.  Overall, topsoil compaction is advisable for enhancing GY and WUE in rain-fed conditions, whereas micro-sprinkler irrigation can be adopted to achieve high GY and WUE simultaneously in the HP.

Key words: winter wheat , micro-sprinkler ,  , grain yield ,  , root distribution ,  , water utilization