Journal of Nuclear Agricultural Sciences ›› 2022, Vol. 36 ›› Issue (1): 183-189.DOI: 10.11869/j.issn.100-8551.2022.01.0183

• Isotope Tracer Technique·Ecology and Environment·Physiology • Previous Articles     Next Articles

Effects of Straw Strip Mulching on Grain-Filling Rate and Yield of Wheat in Northwest Dryland

GAO Tiantian1,2(), CHAI Shouxi1, LI Yawei1, YANG Jiajia3, CHENG Hongbo3,*(), ZHAO Guangcai2,*()   

  1. 1College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070
    2Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081
    3College of Life Science and Technology, Gansu Agricultural University, Lanzhou, Gansu 730070
  • Received:2021-02-22 Accepted:2021-04-21 Online:2022-01-10 Published:2021-12-06
  • Contact: CHENG Hongbo, ZHAO Guangcai

秸秆带状覆盖对西北旱地小麦籽粒灌浆速率和产量的影响

高甜甜1,2(), 柴守玺1, 李亚伟1, 杨佳佳3, 程宏波3,*(), 赵广才2,*()   

  1. 1甘肃农业大学农学院,甘肃 兰州 730070
    2中国农业科学院作物科学研究所,北京 100081
    3甘肃农业大学生命与技术学院,甘肃 兰州 730070
  • 通讯作者: 程宏波,赵广才
  • 作者简介:高甜甜,女,主要从事小麦优质高产栽培研究。E-mail: gtt1368518579@126.com
  • 基金资助:
    国家自然科学基金项目(31760362);国家重点研发计划项目(2018YFD0200401);国家小麦产业体系专项(CARS-3-2-49)

Abstract:

In order to explore effect of straw strip mulching on yield increase of dryland wheat (Triticum aestivum L.), straw strip mulching (M) and open field without mulching (CK) were used to study the effect of straw strip mulching 59%(M3), 50% (M4), 40% (M5) and 37% (M6) on spikelet abortion rate, internode length and plant height, grain filling rate and yield of wheat. The results showed that the spikelet seed setting rate and plant height increased by 0.2% ~ 3.3% and 1.7% ~ 5.3% in straw strip mulching compared to CK. Except for the lower coverage of the M6, straw strip mulching significantly reduced the rate of spikelet abortion. The straw strip mulching increased the grain filling rate and prolonged the grain filling duration in the middle and late stage of wheat. Compared with CK, the straw strip mulching increased the grain filling rate at the fast and slow growth stages by 11.8% and 154.5%, respectively, and the grain weight of CK tended to be stable at 42 d after anthesis, while the straw strip mulching still increased slowly. The yield of different straw strip mulching increased by -0.8% ~ 6.2%, and M3 obtained the highest yield, which was mainly due to the significant increase in ear number. The results of this study can provide reference for the cultivation techniques of the high and stable yield of dryland wheat.

Key words: straw mulching, growth and development, wheat, grain filling, production

摘要:

为探明秸秆带状覆盖对旱地小麦(Triticum aestivum L.)增产的效果,采用秸秆带状覆盖(M)及无覆盖露地(CK)2种种植方式,其中秸秆带状覆盖设置59%(M3)、50%(M4)、40%(M5)、37%(M6)4个秸秆覆盖度,研究其对小麦小穗败育率、节间长度及株高、籽粒灌浆速率和产量的影响。结果表明,与CK相比,秸秆带状覆盖小穗结实率提高0.2%~3.3%,株高增加1.7%~5.3%;除较低覆盖度的M6外,秸秆带状覆盖模式显著降低了小穗败育率。秸秆带状覆盖提高了小麦中后期的灌浆速率,延长了灌浆持续期;秸秆带状覆盖总体较CK提高了快增期和缓增期的灌浆速率,分别提高11.8%和154.5%;花后42 d,CK粒重趋于稳定,而秸秆带状覆盖仍缓慢增加。不同秸秆带状覆盖增产幅度为-0.8%~6.2%,以M3产量提升幅度最高,其产量增加主要是由于穗数的显著提高。本研究结果可为旱地小麦高产稳产栽培技术提供参考。

关键词: 秸秆覆盖, 生长发育, 小麦, 灌浆, 产量