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1试验材料与方法1.1试验地条件试验地点在哈尔滨市呼兰区大用镇沈八村,位于46°25′N、126°11′E,海拔128m,年降雨量500mm,年平均气温3.3℃,无霜期144d,年有效积温2 800℃,土质为黑土,地势平坦,肥力中等,地力均匀,土壤碱解氮160mg/kg,有效磷含量23mg/kg,速效钾含量183mg/kg,有机质含量18g/kg。1.2供试材料
1 Test Materials and Methods 1.1 Test conditions The test sites are located in Shenbai Village, Dabu Town, Hulan District, Harbin. They are located at 46 ° 25’N, 126 ° 11’E and at an elevation of 128m with an annual rainfall of 500mm and annual average temperature of 3.3 ° C , Frost-free period of 144d, annual effective accumulated temperature of 2 800 ℃, soil quality is black soil, flat terrain, medium fertility, uniform soil fertility, soil available nitrogen 160mg / kg, available phosphorus 23mg / kg, available potassium 183mg / kg, kg. 1.2 test materials