肥料与密度对马铃薯'太和9号'的主要农艺性状及产量影响OA

An orthogonal experimental design was adopted to investigate the effects of nitrogen,phosphorus,and potassium application rates and planting density on the main agronomic traits and tuber yield of'Taihe 9'.The optimal cultivation combination for high yield was identified,aiming to provide a technical basis for the extension of this variety.The effects of nitrogen,phosphorus and potassium application rates on plant height,stem diameter,stem number,marketable tuber percentage,tuber number per plant,tuber yield per plant,tuber weight and yield of'Taihe 9'were not significant in nine experimental treatments tested.The density had a significant effect on stem diameter,tuber number per plant and yield of'Taihe 9',and the higher the density,the higher the yield.The highest yield combination of'Taihe 9'was A3B1C3D2,i.e.,the yield could reach 5 206 kg/667m2 when 4 600 plants/667m2 were planted,combined with 5 kg/667m2 nitrogen fertilizer,6 kg/667m2 phosphorus fertilizer and 22 kg/667m2 potassium fertilizer.