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Chinese Journal of Applied Ecology ›› 2019, Vol. 30 ›› Issue (10): 3426-3434.doi: 10.13287/j.1001-9332.201910.025

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Responses of water consumption characteristics and grain yield of maize to different nitrogen form ratios with full film mulching on double ridges and planting in furrows

CUI Zheng-jun1, GUO Li-zhuo1, GAO Yu-hong1*, LI Chun-chun1, PENG Zhi-dong1, LIU Hong-sheng2, NIU Jun-yi1   

  1. 1Gansu Provincial Key Laboratory of Arid Land Crop / College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China;
    2Huining Promotion Center of Agricultural Technology, Huining 730799, Gansu, China
  • Received:2018-11-09 Online:2019-10-20 Published:2019-10-20
  • Contact: *E-mail: gaoyh@gsau.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (31460331), the Fuxi Elitist of Gansu Agricultural University (Gaufx-02J05) and the Open Found of Gansu Provincial Key Laboratory of Aridland Crop Science Project (GSCS-2012-16).

Abstract: To optimize the effects of nitrate (NO3--N) to ammonium (NH4+-N) ratios on water consumption characteristics, grain yield and water use efficiency (WUE) of maize under full film mulching on double ridges, a field experiment was conducted at semi-arid Loess Plateau of Gansu Province, China during 2015 to 2017 cropping seasons. The treatments with different ratios of NO3--N to NH4+-N included: N1 (1:0), N2 (1:1), N3 (1:3) and N4 (3:1). The results showed that different NO3--N/NH4+-N ratios had significant impacts on soil water storage in 0-200 cm soil layer. Treatment N3 had the lowest soil water storage. Treatment N4 significantly increased total water consumption by 2.9%, 1.9% and 0.9% in 2015, and 2.3%, 1.4%, and 2.2% in 2017, compared with N1, N2 and N3 treatments, respectively. Compared with the other treatments, treatment N4 increased grain yield by 3.3%-9.9%, 3.5%-24.2% and 8.3%-36.1% and improved WUE by 1.6%-6.8%, 4.9%-21.8%, and 6.6%-32.9% in 2015, 2016 and 2017, respectively. Treatment N4 had the highest partial productivity of nitrogen fertilizer, followed by N2, N3 and N1, respectively. We recommended treatment N4 as the best nitrate and ammonium ratio to improve water use efficiency, N partial productivity, and grain yield of maize in arid and semi-arid Loess Plateau.