不同连作年限对设施茄子土壤理化性状的影响

Effects of Different Continuous Cropping Years on Soil Physical-Chemical Properties of Eggplant in Greenhouse

为探明不同连作年限对设施茄子土壤理化性状的影响,通过分析台州地区1年、3年、12年、18年的设施茄子土壤理化性状,明确长期连作对设施茄子土壤的影响。研究表明,随着连作年限的增加土壤pH值不断降低,到连作第18年降为4.92,达到强酸性;土壤含盐量随着连作年限的延长不断增加,到第18年为0.25%,产生中度盐碱化土。由于连年长期的施肥以及茄子对各元素的吸收量不同,导致设施茄子土壤养分失调。土壤全氮和有机质含量随着连作年限的延长总体呈递增趋势,相比种植1年,连作第18年均达到显著差异,分别为0.23%和31.53 g/kg。而土壤速效钾含量则呈递减趋势,有效磷呈先增后减趋势。综上所述,设施茄子土壤理化性状随着种植年限的增加发生了改变,可为茄子在设施条件下长期种植提供参考依据。

In order to explore the effects of different continuous cropping years on soil physical-chemical properties of eggplant in greenhouse,soils of different plantation years(1,3,12,18a)in the same area were selected as study objects.The results showed that the soil pH was decreased to 4.92 in 18 years,with increase of continuous cropping years.Soil salt content were increased to 0.25%in 18 years,with increase of continuous cropping years.Because of the long-term fertilization and the different absorption of various elements in eggplant,the soil nutrients were out of balance.With 1 year cropping,both soil total N and organic matter were increased to 0.23%and 31.53 g/kg in 18 years.Besides,with increase of continuous cropping years,soil available K content were decreased,but soil available P content was increased than down.Our findings indicated that continuous cropping of eggplant changed soil physical-chemical properties seriously,and it will provide a reference for rational planning and cultivation of eggplant in greenhouse.