连续施用土壤调理剂对茄子品质及土壤性状的影响

通过连续施用土壤调理剂硅钙钾镁肥对茄子品质和土壤性状的影响研究,了解土壤调理剂硅钙钾镁肥的合理用量,为科学施用提供理论依据。结果表明,施用硅钙钾镁肥能提高茄子产量,提高茄子Vc含量。随硅钙钾镁肥用量的增加,茄子本身的Ca、Mg含量总体上变化趋势并不明显。随着硅钙钾镁肥用量的增加,土壤pH、有效磷、速效钾、交换性钙和交换性镁含量不断增高,用量在1 500kg·hm~(-2)显著高于对照处理;而硅钙钾镁肥的施用对土壤有机质和碱解氮含量影响无显著性差异。考虑到成本因素,土壤调理剂硅钙钾镁肥以750~1 125kg·hm~(-2)的用量对茄子的增产效果和品质最好。

Effects of Continuous Application of a Soil Conditioner on Eggplant Cultivation and Soil Property

Soil conditioners are frequently applied to remedy acidified soils.The silicon-calcium-potassiummagnesium (Si-Ca-K-Mg) fertilizer is a new product in the category.Effects of continuous application of the fertilizer on the quality of the eggplants grown on the soil as well as the properties of the soil were studied.The results showed that the application increased the yield and Vc content of the vegetable,but no significant effect on Ca or Mg with the increased amounts of the fertilization.On the other hand,the application of increasing Si-Ca-K-Mg fertilizer increased the pH,available P,available K,exchangeable Ca and exchangeable Mg in the soil,and peaked when fertilizer 1 500 kg · hm-2 was used.Meanwhile,the organic matters and alkali soluble N did not differ from those in control.Taking both yield and quality of eggplants as well as cost of fertilization into consideration,an Si-Ca-K-Mg fertilizer application rate ranging from 750 kg · hm-2 to 1 125 kg · hm-2 was recommended.