Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2020, Vol. 36 ›› Issue (23): 106-111.doi: 10.11924/j.issn.1000-6850.casb20190600345

Special Issue: 小麦

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Effect on Weed Occurrence and Wheat Yield: Different Herbicide Combinations

Zhang Zichang1(), Fu Yousheng2, Li Yongfeng1(), Gu Tao1, Yang Xia1, Cao Jingjing1   

  1. 1Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing 210014
    2Huaiyin Institute of Agricultural Science of Xuhuai Region in Jiangsu, Huaian Jiangsu 223001
  • Received:2019-06-27 Revised:2019-08-25 Online:2020-08-15 Published:2020-08-13
  • Contact: Li Yongfeng E-mail:zichangzhang2009@163.com;liyongfeng_2010@163.com

Abstract:

To investigate the effect of different herbicide combinations on weed occurrence and wheat yield, a field experiment was conducted from 2016 to 2017 with a high-yield wheat cultivar ‘Huaimai 43’, and five weed control treatments were set up, including manual weeding (T1), 5% pinoxaden+50% isoproteron+15% florasulam·fluroxypyr-mepthyl (T2), 4% pyroxsulam+50% isoproteron+15% florasulam·fluroxypyr-mepthyl (T3), 4% pyroxsulam+15% florasulam·fluroxypyr-mepthyl (T4), 15% clodinafop-propargyl+50 g·L florasulam (T5) and non-weeding treatment as control check (CK). The results showed that, compared with CK, the occurrence amount and dry matter of weed per unit area were significantly reduced after the application of herbicides, especially T3 and T4 showed better control effects, which was up to over 90%. The yield of wheat decreased with the increase of the amount and weight of weed. Compared with CK, wheat yield was markedly increased after weed control, and the yield increase of T1, T2 and T3 was the most, followed by T4, and T5 was the least. Moreover, physiological indexes showed that T1, T2 and T3 exhibited a higher increase in LAI, dry matter accumulation, leaf photosynthetic rate and contents of IAA, GA1+GA4, and Z+ZR in grains of wheat, while T4 and T5 showed a low increase in the above physiological indexes, which could be an important reason for the low increase in wheat yield under T4 and T5 treatments.

Key words: wheat, weed, herbicide, wheat yield, physiological response

CLC Number: