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Chinese Journal of Applied Ecology ›› 2021, Vol. 32 ›› Issue (4): 1307-1316.doi: 10.13287/j.1001-9332.202104.019

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Effects of deep ploughing during the fallow period and soil moisture-based furrow sowing on water and nitrogen utilization of dryland wheat.

ZHAO Jie, LIN Wen, SUN Min*, REN Ai-xia, TONG Jin, LI Hao, WANG Xin-wei, GAO Zhi-qiang   

  1. College of Agriculture, Shanxi Agricultural University, Jinzhong 030801, Shanxi, China
  • Received:2020-11-17 Accepted:2021-02-02 Published:2021-10-25
  • Contact: *E-mail: sm_sunmin@126.com
  • Supported by:
    Modern Agriculture Industry Technology System Construction Project (CARS-03-01-24), The National Natural Science Foundation of China (31771727), Sanjin Scholar Support Special Fund, the Key Innovation Cultivation Team of “1331 Project” in Shanxi Province, Project of Key Laboratory of Crop Ecology and Dry Cultivation Physiology of Shanxi Province (201705D111007) and the Key Innovation Team Project of Wheat Dry Cultivation in Shanxi Province (201605D131041).

Abstract: To understand the effects of deep ploughing during the fallow period and soil moisture-based furrow sowing on the utilization of water and nitrogen in dryland wheat, a field experiment following split-plot design was carried out from 2016 to 2018 in Wenxi County of Shanxi Province, with deep ploughing during the fallow period and no-tillage as main plots and soil moisture-based furrow sowing and drilling sowing as sub-plots. The results showed that, compared with no-tillage treatment, deep ploughing during the fallow period significantly increased soil water storage efficiency (by 38.3%-42.2%), soil water consumption (by 9.2%-13.2%), and nitrogen accumulation in each growth period, which in turn increased the yield by 7.1%-12.0%, annual water use efficiency by 5.5%-14.0%, nitrogen fertilizer absorption efficiency by 4.4%-10.3%, and nitrogen fertilizer partial productivity by 7.1%-12.0%. Compared with the treatment of drilling sowing, the soil moisture-based furrow sowing increased the total water consumption during the growth period (by 2.0%-4.8%) and nitrogen accumulation in each growth period, increased the yield by 6.8%-12.4%, water use efficiency during the growth period by 4.5%-7.2%, nitrogen absorption efficiency by 4.4%-10.3%, nitrogen partial productivity by 6.9%-12.4%. In conclusion, deep ploughing during the fallow period and soil moisture-based furrow sowing in dryland wheat could promote the storage and utilization of natural precipitation, increase plant nitrogen accumulation, and facilitate high wheat yield.

Key words: dryland wheat, deep ploughing, soil moisture-based furrow sowing, yield, water and fertilizer use efficiency