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应用生态学报 ›› 2020, Vol. 31 ›› Issue (11): 3749-3757.doi: 10.13287/j.1001-9332.202011.029

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全膜覆土下施有机肥对春小麦旗叶碳氮比、光合特性和产量的影响

尹嘉德, 侯慧芝, 张绪成*, 王红丽, 于显枫, 方彦杰, 马一凡, 张国平, 雷康宁   

  1. 甘肃省农业科学院旱地农业研究所, 兰州 730070
  • 收稿日期:2020-06-22 接受日期:2020-09-01 出版日期:2020-11-15 发布日期:2021-06-10
  • 通讯作者: * E-mail: gszhangxuch@163.com
  • 作者简介:尹嘉德, 男, 1992年生, 硕士研究生。主要从事旱地作物资源高效利用研究。E-mail: yinjiade@qq.com
  • 基金资助:
    国家重点研发计划项目(2018YFD0200403)、国家自然科学基金项目(31560355)、甘肃省农业科学院农业科技创新专项(2017GAAS27)和甘肃省重点研发计划项目(18YF1WA092)资助

Effects of organic fertilizer application on flag leaf C/N ratio, photosynthetic characteristics and yield of spring wheat with full plastic film mulching

YIN Jia-de, HOU Hui-zhi, ZHANG Xu-cheng*, WANG Hong-li, YU Xian-feng, FANG Yan-jie, MA Yi-fan, ZHANG Guo-ping, LEI Kang-ning   

  1. Institute of Dry-land Agriculture, Gansu Academy of Agricultural Sciences, Lanzhou 730070, China
  • Received:2020-06-22 Accepted:2020-09-01 Online:2020-11-15 Published:2021-06-10
  • Contact: * E-mail: gszhangxuch@163.com
  • Supported by:
    the National Key Research and Development Program of China (2018YFD0200403), the National Natural Science Foundation of China (31560355), the Agricultural Science and Technology Innovation Project of the Gansu Academy of Agricultural Sciences (2017GAAS27), and the Key Research and Development Program of Gansu Province (18YF1WA092).

摘要: 于2016和2017年,以春小麦品种‘陇春27'为试验材料,在甘肃省中部半干旱雨养农业区设置定位试验,分析全膜覆土平作穴播(PMS)、全膜覆土平作穴播+有机肥(PMO)、裸地平作穴播(CK)3个处理春小麦抽穗至灌浆阶段土壤水分与群体冠层温度、净光合速率(Pn)、气孔导度(gs)、蒸腾速率(Tr)、旗叶C/N、旗叶全氮之间的相互关系,探讨不同处理对产量及其构成要素的影响。结果表明: 施用有机肥可提高小麦生育中后期土壤含水量,PMO抽穗至灌浆阶段0~300 cm土层土壤贮水量较PMS和CK分别提高4.6%和8.5%,群体冠层温度分别降低0.1~1.3 ℃和1.4~4.9 ℃,Pn分别提高9.3%和29.7%,gs分别提高30.9%和103.8%,Tr分别提高5.1%和55.0%,全氮含量分别提高6.6%和18.9%,C/N分别降低6.4%和22.8%。收获后,PMO较PMS和CK显著促进穗粒数和千粒重增加,籽粒产量分别提高9.1%和53.7%。抽穗至灌浆阶段旗叶Pngs与C/N呈负相关性;C/N与籽粒产量呈显著负相关。因此,半干旱区全膜覆土穴播条件下施有机肥可提高春小麦抽穗至灌浆阶段土壤含水量,促进旗叶光合作用,有利于降低生理干旱胁迫强度和旗叶氮吸收同化限制,促进穗粒数和粒重增加,使产量提升。

关键词: 全膜覆土, 有机肥, 土壤水分, 光合特性, 旗叶碳氮比

Abstract: A field experiment was conducted in the rain-fed semi-arid region of central Gansu in 2016 and 2017, with the treatments 1) hill-drop flat planting with full plastic film mulching (PMS), 2) hill-drop flat planting with full plastic film mulching plus organic fertilizers (PMO), and 3) hill-drop flat planting without soil mulching (CK). We investigated the relations among soil moisture, photosynthetic rate (Pn), stomatal conductance (gs) and transpiration rate (Tr), C/N ratio, and total nitrogen of flag leaf from the heading stage to the seed-filling stage in different treatments to probe into their effects on the yield and yield components of spring wheat variety ‘Longchun 27'. The results showed that organic fertilizer application could increase soil moisture at the middle and late growth stages of spring wheat. PMO increased soil water storage in 0-300 cm depth from the heading stage to the seed filling stage by 4.6% and 8.5%, decreased population canopy temperature by 0.1-1.3 ℃ and 1.4-4.9 ℃, increased net photosynthetic rate of flag leaf by 9.3% and 29.7%, stomatal conductance by 30.9% and 103.8%, transpiration rate by 5.1% and 55.0%, total nitrogen content by 6.6% and 18.9%, and decreased C/N ratio by 6.4% and 22.8%, respectively. Compared with PMS and CK, PMO significantly improved grain number per spike and 1000-grain weight, and increased grain yield by 9.1% and 53.7%, respectively. From the heading stage to filling stage, the Pn and gs of flag leaf had negative correlation with C/N, while C/N was negatively correlated with grain yield. Consequently, PMO could improve soil water storage and promote photosynthesis of flag leaf, reduce the intensity of physiological drought stress and the limitations of nitrogen absorption and assimilation in flag leaf from the heading stage to the seed-filling stage, and increase grain number and grain weight and consequently the yield of spring wheat in semi-arid region.

Key words: full plastic film mulching, organic fertilizer, soil moisture, photosynthetic characteristics, flag leaf C/N ratio