氮磷钾配比对设施辣椒产量和效益的影响

Effect of Ratio of N,P and K fertilizer on Yield and Economic Benefits of Pepper in Greenhouse

通过田间试验研究了二代日光节能温室氮、磷、钾及其配合施用对辣椒产量及其经济效益的影响。结果表明,供试土壤速效磷、钾丰富,速效氮素相对贫乏,表现为设施内高投肥特征并导致土壤轻度盐渍化;三要素对株高和叶绿素含量的影响顺序为:NPK>NP>NK>PK>CK,氮素的促长效应显著;而肥料配比对辣椒茎粗的影响作用顺序为:NPK>NK>PK>NP>CK,钾素的壮苗品质作用明显。氮肥对温室辣椒的产量具有决定性影响,三要素对辣椒产量影响的顺序为氮>磷>钾;辣椒产量59%依赖于土壤供肥水平。

Field experiments were conducted to study the effect of mixed N,P,K application on yield and economic benefits of pepper in second generation greenhouse.The results showed that the tested soil was abundant of available P and K,but lack of available N.The soil was lightly salinized due to over fertilization.The effective order of fertilizers on height and chlorophyll of pepper is NPKNPNKPKCK.Pepper growth was significantly promoted by N application.The effective order of fertilizers on diameter of pepper stem is NPKNKPKNPCK.K had significantly strong pepper stem.Pepper yield was significantly affected by N.The effective order of fertilizers on pepper production is NPK.59% of pepper yield was rely on soil fertilities.The seasonal use ratio of N,P,and K is only 19.27%,4.74% and 13.38% respectively due to over fertilization.N mixed with P,N mixed with k,and N mixed with both of them can promote the ratio of output and input,as well as promote economic benefit for pepper production in greenhouse.