追施三胺复合肥显著提高马铃薯产量及品质

Topdressing Triamine ’San An’ Compound Fertilizer Significantly Increased Potato Yield and Quality

为筛选出提升马铃薯产量品质最佳的追施肥料。以栽培品种‘大西洋’为试材,设置5种追施肥料处理,测定了株高、叶绿素相对含量SPAD、产量及品质等指标,并利用主成分分析对不同处理作综合评价。结果表明,不同肥料对马铃薯产量品质均有不同程度影响,其中处理F4 (CK+三胺复合肥)的株高在成熟期增幅最高,达163.15%;且其SPAD下降平缓,降幅为22.12%;F4处理产量最高,为30 555.00 kg/hm2;品质方面,F3效果最佳,F4次之。主成分分析结果显示:F4的综合得分最高。因此,在陇中半干旱地区追施三胺复合肥可显著增加马铃薯株高、提高叶片SPAD及产量,改善块茎品质。

‘The Atlantic’was employed as experimental material and five kinds of topdressing fertilizer treatments were carried to filter the optimal topdressing fertilizer for potato yield and quality.Plant height,relative chlorophyll content SPAD,yield and quality were determined,and multiple indices were analyzed by principal component analysis(PCA)to evaluate the effects of topdressing fertilizers.The results showed that different fertilizers had different effects on potato yield and quality.Under F4(topdressing‘San An’compound fertilizer on base fertilizers),the plant height increased by 163.15%at maturity;SPAD was declined gently,with a decrease of 22.12%;and the maximum yield was 30555.00 kg/hm2.In addition,F3(topdressing high-potasium-type massive element in water-soluble fertilizer on base fertilizers)had the optimal effect for quality,followed by F4.PCA indicated that F4 had the highest score.Consequently,the plant height,SPAD,potato yield and tuber quality could be improved dramatically by the method of topdressing‘San An’compound fertilizer in the semi-arid areas of central Gansu.