几种缓释钾肥对烤烟钾含量及产量产值的影响_刘金

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1、2014-06，35（3）中国烟草科学ChineseTobaccoScience17几种缓释钾肥对烤烟钾含量及产量产值的影响121*211刘金，李进平，涂书新，陈振国，彭孟祥，魏文娟（1.华中农业大学资源与环境学院，武汉430070；2.湖北省烟草科研所，武汉430030）摘要：采用农艺技术措施提高烤烟钾素含量是提高烤烟烟叶品质和产值的重要途径。通过缓释钾肥钾养分释放试验及大田肥效试验，研究了包膜硝酸钾、腐殖酸氯化钾、包膜腐殖酸氯化钾等缓释肥料的钾营养释放特征，以及对烤烟钾含量和产量、产值的影响。结果表明，标准条件下，上述3种缓释钾肥28d钾养分累

2、积释放率分别为67.2%、100%和87.5%，缓释能力以包膜硝酸钾肥最好。与常规钾肥相比，大田缓释钾肥处理的土壤速效钾含量在烤烟生长后期并未降低且有增加趋势，施用缓释钾肥提高烟叶钾含量13%～39%，烤烟产量6%～32%，产值7%～32%。缓释钾肥对提高烤烟钾含量及产量产值有重要作用，可以在生产上推广应用。关键词：缓释钾肥；释放特征；烤烟；钾含量；产值中图分类号：S572.06文章编号：1007-5119（2014）03-0017-06DOI：10.13496/j.issn.1007-5119.2014.03.004EffectofSlowly-r

3、eleasedPotassiumFertilizersonPotassiumContentandYieldofFlue-curedTobacco121*211LIUJin,LIJinping,TUShuxin,CHENZhenguo,PENGMengxiang,WEIWenjuan(1.CollegeofResourceandEnvironment,HuazhongAgriculturalUniversity,Wuhan430070,China;2.TobaccoScienceInstituteofHubeiProvince,Wuhan430030,

4、China)Abstract:AgronomicmeasurescanbeadaptedtoincreaseplantKcontent,whichisoneofimportantstrategiestoimprovethequalityandoutputvalueofflue-curedtobacco.ExperimentsonKreleaseandfieldcropresponseofslowly-releasedKfertilizers,i.e.,PVCoatedpotassiumnitrate,Humicmattercoatedpotassiu

5、mchloride,andPVandhumiccoatedpotassiumchloride,wereconductedtoinvestigatetheKreleasecharacteristicsandtheireffectsonyieldandoutputvalueoftobacco.TheresultsshowedthattheaccumulativesolubilityratesofKofthreeslowly-releasedKfertilizersin28daysunderstandardconditionswere67.2%,100%a

6、nd87.5%,respectively,ofwhichtheperformanceofPVcoatedpotassiumnitratewasthebest.ThecontentofsoilavailableKincreasedatlategrowthstageofplanttreatedwiththeslowlyreleasedfertilizers.Comparedwiththecontrol(commonKfertilizer),applicationofslowly-releasedpotassiumincreasedleafKcontent

7、by13%-39%,yieldby7%-32%,andproductionvalueby7%-32%.Inconclusion,theslowly-releasedpotassiumfertilizerstestedhavepositiveeffectsonincreasingKcontentandoutputvalueoftobacco,andhashighpotentialintobaccoproduction.Keywords:slowlyreleasedpotassiumfertilizer;nutrientrelease;flue-cure

8、dtobacco;potassiumcontent;outputvalue[1]烟草钾含量一般为2%～4%，