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首页> 外文期刊>Japan agricultural research quarterly >Evaluation of an Agropastoral System Introduced into Soybean Fields in Paraguay: Positive Effects on Soybean and Wheat Production:Positive Effects on Soybean and Wheat Production
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Evaluation of an Agropastoral System Introduced into Soybean Fields in Paraguay: Positive Effects on Soybean and Wheat Production:Positive Effects on Soybean and Wheat Production

机译：巴拉圭引入大豆田的农耕系统的评价：对大豆和小麦生产的积极影响：对大豆和小麦生产的积极影响

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Effects of an agropastoral system on the production of soybean and wheat were investigated by comparing, from 2003 to 2007, agropastoral plots that had been converted from 7-year pasture (guinea grass: Panicum maximum; 1996 to 2003) to crop cultivation, with control plots that had been continuously cropped over 10 years with soybean at the Japan International Cooperation Agency's Paraguay Agricultural Technology Center (CETAPAR-JICA). Soybean productivity in this area increased from 1979 until 1993, when yield peaked at 3.39 t/ha and then declined. In this study, soybean yields ranged from 1.48 to 3.56 t/ha in agropastoral plots and from 0.63 to 2.47 t/ha in control plots. In each year, the yield in the agropastoral plots was 1.1 to 2.4 times more than in the control plots. Wheat yields were also higher in agropastoral plots (1.59 to 3.17 t/ha) than in control plots (1.18 to 2.31 t/ha). In each year, yield in the agropastoral plots was 1.2 to 1.8 times more than in the control plots. Thus, soybean and wheat yields were sustained by introducing an agropastoral system. We also examined the chemical and physical properties of the soil under initial conditions in both plot types. The concentrations of phosphate, potassium and magnesium in surface soil in agropastoral plots were significantly lower than in control plots. The content of organic matter at soil depths of 0 to 60 cm in the agropastoral plots was significantly higher than in the control plots, and the physical properties of the agropastoral plot soil (gaseous phase, bulk density, and soil aggregates) were improved. We conclude that the agropastoral system positively affected all these properties.
机译：通过比较2003年至2007年从7年牧场（几内亚草：Panicum max; 1996年至2003年）转变为作物种植并有控制的农牧地，研究了农牧系统对大豆和小麦生产的影响在日本国际合作社的巴拉圭农业技术中心（CETAPAR-JICA）上，大豆连续十年种植的地块。该地区的大豆生产力从1979年到1993年有所增加，当时产量达到3.39吨/公顷的峰值，然后下降。在这项研究中，农牧区的大豆单产为1.48至3.56吨/公顷，对照区的大豆单产为0.63至2.47吨/公顷。每年，农牧区的产量是对照区的1.1至2.4倍。农牧区（1.59至3.17 t / ha）的小麦单产也高于对照区（1.18至2.31 t / ha）的小麦。每年，农牧区的产量是对照区的1.2至1.8倍。因此，通过引入农牧系统维持了大豆和小麦的单产。我们还研究了两种地块在初始条件下土壤的化学和物理性质。农牧地块表层土壤中磷酸盐，钾和镁的含量明显低于对照地块。农牧交错区土壤深度0〜60 cm的有机质含量明显高于对照样，改善了农牧交错区土壤的物理性质（气相，容重和土壤团聚体）。我们得出的结论是，农牧系统对所有这些特性都有积极影响。

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