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Acta Agron Sin ›› 2013, Vol. 39 ›› Issue (11): 2009-2015.doi: 10.3724/SP.J.1006.2013.02009


Effects of Integrated Agronomic Practices on Nitrogen Efficiency and Soil Nitrate Nitrogen of Summer Maize

JIN Li-Bin1,CUI Hai-Yan1,LI Bo1,YANG Jin-Sheng2,DONG Shu-Ting1,ZHAO Bin1,LIU Peng1,ZHANG Ji-Wang1,*   

  1. 1State Key Laboratory of Crop Biology, Agronomy College of Shandong Agricultural University, Tai’an 271018, China; 2Shandong Denghai Seeds Co. Ltd, Shandong Provincial Key Laboratory of Corn Breeding and Cultivation Technology, Laizhou 261448, China
  • Received:2013-02-04 Revised:2013-06-09 Online:2013-11-12 Published:2013-08-12
  • Contact: 张吉旺, E-mail: jwzhang@sdau.edu.cn, Tel: 0538-8245838


A field study with an integrated management experiment and a nitrogen (N) application rate test was conducted to explore the effects of integrated agronomic practices such as sowing methods, sowing time, fertilizers amount and applied date and harvest time on N efficiency and nitrate N of summer maize,. Results showed that, with increasing N application amount partial factor productivity of applied N increased and N fertilizer agricultural utilization efficiency decreased significantly; N use efficiency and N harvest index increased first and then decreased gradually, and both of them reached the maximum at a N application of 184.5 kg ha-1; the N accumulation before tasseling stage and nitrate N accumulation in 0–30 cm soil increased. That means that it is difficult to realize high N efficiency and lower soil N accumulation persistently. Under integrated management of further high yield and high efficiency treatment (Opt-2), the partial factor productivity of applied N, N fertilizer agricultural utilization efficiency, N use efficiency and N harvest index all increased significantly; the N accumulation before tasseling stage was low, but the N accumulation of plants was higher than that under farmers’ traditional cultivation and lower than that under high yield treatment at harvest time; after harvesting, the nitrate N accumulation in 0–30, 30–60, and 60–90 cm soils was lower than that under farmers’ practices. Therefore the N efficiency of summer maize was increased significantly and the N accumulation trend was reasonable in growing season and the soil nitrate N accumulation was lower after harvesting when the integrating agronomic practices are performed.

Key words: Summer maize, Integrated agronomic practices, N efficiency, Nitrate N, High yield and high efficiency

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