为给牛角瓜经营技术的研究提供参考依据,以牛角瓜为试验材料,在云南省元江县的干热河谷地区,就氮、磷、钾肥的不同用量水平对牛角瓜株高、地径、叶片数和冠幅生长等生理指标的影响情况开展了"3414"的施肥试验.结果表明:施肥处理对其株高的影响极显著;对其东西冠幅的影响,由不显著变为显著,最后变为极显著;对南北冠幅的影响,由极显著变为显著;对地径、萌蘖和叶片数的影响均不显著;对花序数的影响,由不显著变为显著,最后变为不显著.氮、磷、钾肥对牛角瓜产量的影响均达极显著水平.在目前的土壤肥力条件下,配施尿素65.22 g/株、过磷酸钙37.50 g/株、硫酸钾24.00 g/株所得牛角瓜的产量最大.%In order to provideareferenceforresearchingmanagement technologyinCalotropis gigantea, takingC. giganteaasmaterials, effects of differentapplicationlevels of N, Pand Kfertilizers on tree height,ground diameter, leaf numberand crowngrowthwereresearched by"3414"fertilizer experimentat dry-hotvalleyareas of Yuanjiang County, Yunnan Province. Theresults showed that thefertilization treatments hadvery signiifcant effects on tree height, and had no signiifcant effects onground diameter, tillersandleaf number. Effects of the treatments on crown breadth (east-west direction)werefrominsigniifcant to signiifcant,ifnally tovery signiifcant,and the effects on crown breadth (north-south direction)werefromvery signiifcant to signiifcant. The effects oninlforescenceswerefrominsigniifcant to signiifcant,ifnally toinsigniifcant. The effects of N, Pand Kfertilizers on yieldin C. gigantea hadallreachedvery signiifcantlevel. Applying 65.22g urea, 37.50g calcium superphosphateand 24.00g potassium sulfate per plant could reach themaximum yieldinC. gigantea under the currentfertility conditions.
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