中国农业科学 ›› 2018, Vol. 51 ›› Issue (18): 3455-3469.doi: 10.3864/j.issn.0578-1752.2018.18.003

• 耕作栽培·生理生化·农业信息技术 • 上一篇    下一篇

极端年型旱地麦田深松和覆盖播种水分消耗与植株氮素吸收、利用关系的研究

李念念(), 孙敏(), 高志强, 张娟, 张慧芋, 梁艳妃, 杨清山, 杨珍平, 邓妍   

  1. 山西农业大学农学院,山西太谷 030801
  • 收稿日期:2018-06-22 接受日期:2018-08-06 出版日期:2018-09-16 发布日期:2018-09-16
  • 作者简介:

    联系方式:李念念,Tel:0354-6287187;E-mail:15235470341@163.com

  • 基金资助:
    国家现代农业产业技术体系建设专项(CARS-03-01-24)、作物生态与旱作栽培生理山西省重点实验室项目(201705D111007)、小麦旱作栽培山西省重点创新团队项目(201605D131041)、黄土高原特色作物优质高效生产山西省协同创新中心项目(J241643D30)、国家自然科学基金(31771727)、山西省回国留学人员重点科研资助项目(2015-重点4)、三晋学者支持计划专项经费资助项目(J24174400)、山西省回国留学人员科研资助项目(2017-068)、晋中市科技计划(Y172007-2)

A Study on the Relationship Between Water Consumption and Nitrogen Absorption, Utilization Under Sub-Soiling During the Fallow Period Plus Mulched-Sowing in Humid and Dry Years of Dryland Wheat

NianNian LI(), Min SUN(), ZhiQiang GAO, Juan ZHANG, HuiYu ZHANG, YanFei LIANG, QingShan YANG, ZhenPing YANG, Yan DENG   

  1. College of Agriculture, Shanxi Agricultural University, Taigu 030801, Shanxi
  • Received:2018-06-22 Accepted:2018-08-06 Online:2018-09-16 Published:2018-09-16

摘要:

【目的】为明确旱地麦田土壤水分变化与植株氮素吸收利用及产量形成的关系,探索极端年型可采取的耕作蓄水、覆盖播种等应急措施。【方法】2011—2016年于山西运城闻喜县开展大田试验,选取2011—2013、2015—2016 3年降雨量极端年份,在休闲期深松和免耕2个耕作基础上,对全膜覆土穴播、膜际条播、常规条播3类播种方式进行研究,分析极端年型休闲期深松蓄水配套覆盖播种对旱地麦田水分消耗与植株氮素吸收和利用关系的影响。【结果】不同降水年型休闲期深松较免耕,覆盖播种较常规条播,播种—拔节阶段土壤耗水量及其比例降低,拔节—开花和开花—成熟两阶段土壤耗水量及其比例增加,生育期总耗水量增加;各生育阶段吸氮量增加,尤其是拔节—开花阶段吸氮比例;花前各器官氮素运转量及其对籽粒的贡献率增加;深松较免耕显著提高产量16%—30%,覆盖播种较常规条播提高产量13%—28%,同时水分利用效率提高,氮素吸收效率和氮素生产效率显著提高。不同降水年型、深松与否均影响了全膜覆土穴播和膜际条播两播种方式对麦田水分消耗、氮素吸收利用、产量、水分和养分利用效率。丰水年深松条件下,全膜覆土穴播较膜际条播生育期总耗水量增加,拔节—开花阶段吸氮量显著增加,叶片中氮素运转量对籽粒的贡献率显著提高,产量、氮素吸收效率和氮素生产效率显著提高;而欠水年和丰水年在未深松条件下,两覆盖播种间生育期总耗水量差异不显著,膜际条播较全膜覆土穴播花前各器官氮素运转量、茎秆+叶鞘氮素积累量对籽粒的贡献率和花后氮素积累量提高,产量提高、氮素吸收效率也显著提高。此外,丰水年播种—拔节0—120 cm,拔节—开花120—300 cm,开花—成熟180—300 cm土层耗水量与花前各器官氮素运转量和花后氮素积累量相关性达显著或极显著水平;欠水年,播种—拔节0—100 cm,拔节—开花120—240 cm,开花—成熟120—300 cm土层耗水量与花前各器官氮素运转量和花后氮素积累量相关性达显著或极显著水平。【结论】旱地小麦休闲期深松、生育期采用覆盖播种可增加小麦生育期耗水,促进各生育阶段植株对氮素的吸收及运转,从而提高产量、水分和养分效率。休闲期深松条件下,丰水年采用全膜覆土穴播,欠水年采用膜际条播,增产增效明显。

关键词: 旱地小麦, 休闲期深松, 覆盖播种, 水分消耗, 氮素利用, 产量

Abstract:

【Objective】The objective of these experiments was to clarify the relationship among soil water variety, nitrogen utilization and yield, and to explore emergency measures of tillage and mulched-sowing technique. 【Method】Field experiments were carried out from 2011 to 2016 in Wenxi, Shanxi province, with sub-soiling (SS) or no-tillage (NT) as the main plots and three sowing methods (Film-mulched soil hole sowing, FSH; Film-mulched sowing, FM; Drill sowing, DS) as the subplots, classification of annual type according to precipitation, in order to assess the effects of mulched-sowing under sub-soiling on relationship with water consumed and accumulation absorption and utilization in dry wheat.【Result】Under difference precipitation, the water consumption amount and its ratio was declined from sowing stage to jointing stage, but the water consumption amount and its ratio from jointing stage to mature was increased, thus water consumption during growth period was increased under sub-soiling and mulched-sowing; Nitrogen accumulation at every growth stage also was increased, especially ratio of nitrogen accumulation from jointing stage to anthesis; Pre-anthesis nitrogen translocation amount in various organs and contribution of translocation to grain was increased; Grain yield was improved significantly by 16%-30% under sub-soiling and 13%-28% under mulched-sowing, water use efficiency was improved, and nitrogen uptake efficiency and nitrogen productive efficiency was improved significantly. Difference annual precipitation and sub-soiling affected water consumption, nitrogen absorption, utilization, grain yield, water use efficiency, and nitrogen use efficiency of FHS and FM. In humid year under SS, water consumption during growth was increased, nitrogen accumulation from jointing stage to anthesis stage and contribution of leaf nitrogen translocation to grain was increased significantly, and grain yield, nitrogen uptake efficiency and nitrogen productive efficiency was increased significantly under FSH, compared with FM. However, in dry year and humid under no sub-soiling, water consumption during growth was no significantly between FSH and FM, pre-anthesis nitrogen translocation amount in various organs, contribution of stem+sheath nitrogen translocation to grain, and nitrogen accumulation amount after anthesis, finally grain yield were increased, and nitrogen uptake efficiency was increased significantly improved under FM compared with FSH. In addition, in humid year, pre-anthesis nitrogen translocation amount in various organs and nitrogen accumulation amount after anthesis was more significantly correlated with 0-120 cm water consumption from sowing stage to jointing stage, 120-300 cm water consumption at jointing stage to anthesis, 180-300 cm water consumption at anthesis to mature; In dry year, pre-anthesis nitrogen translocation amount in various organs and nitrogen accumulation amount after anthesis was more significantly correlated with 0-100 cm water consumption at sowing stage to jointing stage, 120-240 cm water consumption at jointing stage to anthesis, and 120-300 cm water consumption at anthesis to mature.【Conclusion】In conclusion, sub-soiling during the fallow period, mulched-sowing was not only increased water consumption, but also beneficial to nitrogen accumulation during growth period, ultimately significant improved yield, water use efficiency, and nitrogen use efficiency. Film-mulched soil hole sowing in humid year and film-mulched sowing in dry year increased yield and efficiency of dryland wheat under sub-soiling during the fallow period.

Key words: dryland wheat, sub-soiling during the fallow period, mulched-sowing, water consumption, nitrogen utilization, yield