Analysis of cooperation effect of water and fertilizer on wheat and pea in dryland based on APSIM model

Abstract

Abstract: In order to explore the influence mechanism and regulation of the cooperation effect of water and fertilizer on yields of crops, APSIM (agricultural production system simulator) model and multiple regressions were used to explore the cooperation effect of water and fertilizer on yields of rotation system with wheat (Triticum aestivum) and pea (Pisum sativum) in loess hilly region of China. The parameters of APSIM model were firstly modified and then verified according to the data collected from field experiment. APSIM model was used to simulate yields of rotation system with wheat and pea within 30 years. The results showed that APSIM model can be used to simulate yields of rotation system with wheat and pea. The order of effect on yields of rotation system with wheat and pea is precipitation of growing stage (denote X₂)>precipitation of fallow period (denote X₃)>nitrogen fertilizer application (denote X₁). There was a diminishing return of nitrogen fertilizer application on yield of wheat. The optimum nitrogen rate was 65.0 kg/ha and 17.9 kg/ha, respectively. The order of cooperation effect on rotation system with wheat and pea is X₂X₃>>X₁X₃>X₁X₂. Cooperation effect of precipitation of growth stage and precipitation of fallow period was higher than others cooperation effect. Precipitation has a higher effect on crops yields than fertilizer application. At same time, cooperation of precipitation and fertilizer had a high effect on crops yields.

CLC Number:

LI Guang, HUANG Gao-bao, WANG Qi, LUO Zhu-zhu. Analysis of cooperation effect of water and fertilizer on wheat and pea in dryland based on APSIM model[J]. Acta Prataculturae Sinica, 2011, 20(5): 151-159.

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