不同施肥组合对苜蓿阴阳离子平衡的影响  

Effects of fertilizer combinations on the cation-anion balance of alfalfa

作　　者：李运起[1] 高向培 李秋凤[1] 李建国[1] 曹玉凤[1] 高艳霞[1] 唐淑霞[3] 于合兴 李月娥[4] 贾海军[1] 杨武[1] 

机构地区：[1]河北农业大学动物科技学院,河北保定071001 [2]饶阳县政务服务中心,河北饶阳053900 [3]黄骅市农业局,河北黄骅061100 [4]黄骅市畜牧局,河北黄骅061100

出　　处：《草业学报》2012年第6期117-122,共6页Acta Prataculturae Sinica

基　　金：国家科技支撑计划(2006BAD04A10);河北省重大科技创新项目(07227146Z);国家现代农业产业技术体系建设专项资金(CARS-37)资助

摘　　要：试验采用二次回归正交旋转组合设计,研究了硫酸钾、氯化铵、过磷酸钙和氧化镁对苜蓿阴阳离子平衡(CAB)的影响。结果表明,苜蓿株体中K+含量最高,变化范围为2.40%～4.01%,其次为Cl-、S2-,变化范围分别为0.84%～1.09%和0.35%～0.58%,Na+的含量最低,其变化范围为0.09%～0.22%;CAB值范围为155～501mEq/kg DM。对苜蓿CAB值有显著影响的因子为硫酸钾和氧化镁,二者和苜蓿CAB值间存在显著的负效应;氯化铵和过磷酸钙单因子对苜蓿CAB值影响不显著,但氯化铵与过磷酸钙、氯化铵与氧化镁之间的交互作用可以显著影响苜蓿CAB值。单施一种肥料可使苜蓿CAB值最低降到216.55mEq/kg DM,效果不显著,而组合施用可降到80.55mEq/kg DM。在本试验条件下,苜蓿CAB值最低的施肥组合为:硫酸钾50kg/hm2,氯化铵275kg/hm2,过磷酸钙1 000kg/hm2,氧化镁55kg/hm2。The effects of fertilizer combinations on the cation-anion balance of alfalfa were analysed using a quadratic regression orthogonal rotating combination design.The most common cation in alfalfa was K＋,which ranged from 2.40% to 4.01%,followed by Cl-（0.84%-1.09%） and S2-（0.35%-0.58%）,while the lowest was Na＋,0.09%-0.22%.The cation-anion balance ranged from 155 to 501 mEq/kg DM.The factors that had a significant negative impact on the cation-anion balance in alfalfa were potassium sulfate and magnesium oxide.Even though the effects of ammonium chloride and superphosphate on the cation-anion balance were not significant,the interactions between ammonium chloride,superphosphate,and magnesium oxide significantly affected the balance.All of the fertilizers lowered the balance to 216.55 mEq/kg DM,which was not significant.However,the combination of fertilizers lowered the balance to 80.55 mEq/kg DM.The fertilizer combination which retained the lowest balance was 50 kg/ha potassium sulfate,275 kg/ha ammonium chloride,1 000 kg/ha superphosphate,and 55 kg/ha magnesium oxide.

关 键 词：苜蓿 施肥组合 阴阳离子平衡(CAB) 

分 类 号：S541.9[农业科学—作物学]