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Chinese Agricultural Science Bulletin ›› 2023, Vol. 39 ›› Issue (15): 14-21.doi: 10.11924/j.issn.1000-6850.casb2022-0505

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Water and Nitrogen Management Under Water-limited Wheat Cultivation: Effects on Yield, Water Use Efficiency and Nitrogen Use Efficiency

WEN Guochang1(), LI Baojun1,2(), YANG Pu1, LIU Qingfang1,2, HE Weizhao1, JIA Jianbin1   

  1. 1 Handan Academy of Agricultural Sciences, Handan, Hebei 056001
    2 The Key Laboratoryof Crop Hybrid Advantage Research and Utilization of Hebei Province, Handan, Hebei 056001
  • Received:2022-06-27 Revised:2022-10-27 Online:2023-05-25 Published:2023-05-22

Abstract:

In order to explore the effect of water and nitrogen management on wheat yield, water use efficiency and nitrogen use efficiency in medium and low-yield fields in southern Hebei under water limitation, the wheat variety ‘Han 6172’ was used as experimental material, and the effects of the irrigation periods in spring (W1: irrigation at the standing stage, W2: irrigation at the jointing stage) and the base-topdressing ratio of nitrogen fertilizer (N0 0:0, N1 3:7, N2 5:5, N3 7:3) on wheat yield, water use efficiency and nitrogen use efficiency were studied. The results showed that the irrigation period had significant impact on wheat yield, water use efficiency and nitrogen use efficiency. Compared with those of treatment W2, the wheat yield, irrigation productivity and nitrogen fertilizer partial productivity of treatment W1 were increased by 3.5%-18.7%, 2.1%-7.0%, and 2.8%-7.5%, respectively, and significant increase was observed when the proportion of basal application of nitrogen fertilizer was low. The base-topdressing ratio of nitrogen fertilizer had significant impact on wheat yield, water use efficiency and nitrogen use efficiency. Compared with those of treatment N1, the wheat yield, grain nitrogen uptake, straw nitrogen uptake, plant nitrogen uptake, nitrogen apparent use efficiency and nitrogen partial productivity of treatment N3 were significantly increased by 5.7%-9.7%, 5.0%-8.4%, 6.7%-6.8%, 5.5%-24.5%, 6.8%-24.8%, and 5.7%-9.7%, respectively. The wheat yield, grain nitrogen uptake, straw nitrogen uptake, plant nitrogen uptake, nitrogen apparent utilization efficiency and nitrogen partial productivity of treatment N3 were higher than those of treatment N2, but the differences were not significant. Under this test conditions, the irrigation productivity of treatment W1N3 was the highest, reaching 4.8 kg/m3, and the wheat yield was the highest, reaching 7242.0 kg/hm2. To sum up, under the premise of water-saving and stable yield, W1N3 (irrigation at standing stage, the base-topdressing ratio of nitrogen fertilizer as 7:3) can be used as the practice reference for water and nitrogen management under water-limited wheat cultivation in medium and low-yield fields in southern Hebei.

Key words: wheat, irrigation at the standing stage, irrigation at the jointing stage, the base-topdressing ratio of nitrogen fertilizer, yield