【摘要】 采用叶面喷施的方法,研究不同水平铜对紫花苜蓿草产量和矿质营养的影响。结果表明:喷施铜能提高紫花苜蓿草产量;施铜200 mg/kg效果最好,草产量比CK显著提高1328.15 kg/hm2(P<0.05)。喷施铜肥显著促进了紫花苜蓿对铜、锌和磷的吸收,适量则能显著促进对铁、硼、硒、钙、钼、锰和钴的吸收。喷施铜肥显著降低了紫花苜蓿钙的含量;而未显著影响铁和硼的含量;适量则能显著提高硒、磷、铜、锰和锌的含量;过量则显著降低钴和钼的含量。紫花苜蓿钙、钴、钼、铁、硼、锰的含量和吸收量随施铜量增加而降低,硒、磷的含量和吸收量随施铜量增加呈先升后降趋势,铜的含量和吸收量随施铜量增加而升高,锌的吸收量随施铜量增加呈先升后降趋势,而含量却随施铜量增加而升高。更多还原

【Abstract】 Adopting the method of spraying leaf’surface,the experiment was conducted to investigate the effect of Cu on herbage yield and mineral nutrition of alfalfa.The results showed that spraying Cu could remarkably(P<0.05) increase the herbage yield of alfalfa.Among the 3 doses,the 200 mgCu/kg was the most effective,the herbage yields markedly increased by 1328.15 kg/hm2 compared with CK;it remarkably(P<0.05) increased the absorbtion of Cu,P and Zn;the appropriate spraying of Cu could remarkably(P<0.05) increase the absorbtion of Fe,B,Se,Ca,Mn,Co and Mo and remarkably(P<0.05) reduce Ca’s content,but there was no significant impact on Fe and B’s content after spraying Cu;appropriate spraying of Cu could remarkably(P<0.05) increase Se,P,Cu,Mn and Zn’s content,but excessive spraying could remarkably(P<0.05) reduce Co and Mo’s content.Moreover Mn,Ca,Fe,Se,Co,Mo,B’s content and absorbing quantity of alfalfa decreased with the increasing application of Cu fertilizer,Se,P’s content and absorbing quantity increased first and then decreased with the increasing application of Cu fertilizer.Cu’s content and absorbing quantity of alfalfa increased with the increasing application of Cu fertilizer,Zn’s absorbing quantity increased first and then decreased with the increasing application of Cu fertilizer,and its content increased with the increasing application of Cu fertilizer.更多还原