Effects of Nitrogen Fertilization on Dry Matter Accumulation and Yield Components of Following Wheat Which Planted after Maize Peanut Intercropping
MENG Weiwei1, ZHANG Zheng1, XU Jie1, NAN Zhenwu1, LIU Lingyan1, GAO Huaxin1, GUO Feng2, WAN Shubo2
1. Institute of Crop, Shandong Academy of Agricultural Sciences, Key Laboratory of Crop Genetic Improvement and Ecological Physiology of Shandong Province, National Engineering Laboratory for Wheat and Maize, Ji'nan 250100, China;
2. Shandong Academy of Agricultural Sciences, Biotechnology Research Center, Key Laboratory of Crop Genetic Improvement and Ecological Physiology of Shandong Province, Ji'nan 250100, China
Abstract：In order to study the suitable, stable and efficient nitrogen fertilizer management for following wheat after maize peanut intercropping, the effects of nitrogen fertilization on yield and yield structure, accumulation and distribution of dry matter and nitrogen use efficiency of following wheat after maize peanut intercropping were studied. Jimai 22 was used as experimental material. With traditional nitrogen application (225.0 kg/ha)as control, different nitrogen and nitrogen reduction treatments were set up respectively. The results indicated that there were no significant differences in the dry matter accumulation, total nitrogen accumulation, pre-anthesis dry matter translocation amount, post-anthesis dry matter accumulation amount and grain yield among the treatment increased the amount of nitrogen fertilizer, two increased nitrogen treatments, decreased 10% treatment and the control. The dry matter accumulation after jointing, total nitrogen accumulation, pre-anthesis dry matter translocation amount, post-anthesis dry matter accumulation amount and grain yield were significantly reduced by 30% nitrogen reduction. The study also found that the spike number per hectare decreased with the decreased of nitrogen fertilizer in the range of increase or decrease 30%. There was no significant difference in the number of hectare per hectare treated with nitrogen reduction 10%, which was significantly higher than that of nitrogen reduction over 20%. Nitrogen application had no significant effect on grain number per ear and thousand kernel weights. The nitrogen partial factor productivity (NPFP)of following wheat after maize peanut intercropping was significantly improved by reduction of nitrogen. Under the conditions of this experiment, there was no significant difference on dry matter accumulation and yield of wheat, but the nitrogen partial productivity was sharply increased when the nitrogen fertilization was reduced from 225.0 kg/ha to 202.5 kg/ha. That the amount of nitrogen fertilizer reduced from 225.0 kg/ha to 202.5 kg/ha was beneficial to the efficient and safe production of following wheat after maize peanut intercropping.
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2018, Vol. 33 
