Acta Agriculturae Zhejiangensis ›› 2025, Vol. 37 ›› Issue (9): 1849-1859.DOI: 10.3969/j.issn.1004-1524.20250037

• Crop Science • Previous Articles     Next Articles

Effects of water-fertilizer coupling regimes on maize yield and water and fertilizer use efficiency under mulched drip irrigation in Jingdian irrigation district of China

YAN Peizhong1(), CHEN Liang2,3, ZHANG Shengyin4, LIU Bin1,3,*()   

  1. 1 Gansu Jingtaichuan Irrigation Water Resources Utilization Center, Jingtai 730400, Gansu, China
    2 Gansu Academy of Agri-Engineering Technology, Wuwei 733006, Gansu, China
    3 College of Horticulture, Gansu Agricultural University, Lanzhou 730070, China
    4 Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730099, China
  • Received:2025-01-10 Online:2025-09-25 Published:2025-10-15
  • Contact: LIU Bin

Abstract:

The development of modern agricultural water-saving technology is an effective way to solve the water shortage and improve the efficiency of water resources in the arid regions of northwest China. In order to study the effect of water-fertilizer coupling of drip irrigation under sub-membrane drip irrigation on the growth and yield of maize in Jingdian irrigation area and to find out a suitable regime, a plot experiment was conducted. The local drip irrigation amount and fertilizer application rate were used as control (CK), and 3 soil water matric potentials [-10 kPa (W1), -20 kPa (W2), -30 kPa (W3)] and 3 fertilizer applicatin rates [85% (F1), 75% (F2) and 65% (F3) of the control] were set. It was shown that W2F2 treatment exhibited the best performance under the experiment conditions. Under this treatment, the weight of aboveground dry matter of maize was significantly (p<0.05) increased by 13.7%, 9.0% than that of CK at the booting, filling period, respectively, the yield was 18.23 t·hm-2, and the economic income was 42 548 yuan·hm-2, which was 4.9% higher than that of CK. Besides, the water use efficiency and partial factor productivity of fertilizers under W2F2 treatment were increased by 12.5% and 36.3%, respectively, as compared with the CK, and W2F2 treatment had no significant adverse effect on soil salt content. Compared with the CK, W2F2 treatment could save water and fertilizer usage by 24.7% and 25.0%, respectively. Specifically, the water-fertilizer coupling regime of W2F2 treatment was as follows: 8 times of irrigation during the whole growth period, irrigation quota of 2 880 m3·hm-2, and input of N 157.5 kg·hm-2, P2O5 82.5 kg·hm-2 and K2O 82.5 kg·hm-2 with a ratio of 20%, 30%, 30%, 20% at seedling, jointing, booting and filling period, respectively.

Key words: mulched drip irrigation, water-fertilizer coupling, maize, water use efficiency, partial factor productivity of fertilizer

CLC Number: