太谷县不同年限大棚土壤性质及养分含量变化特征

摘要

对晋中市太谷县不同种植年限的大棚蔬菜土壤性质及养分含量变化特征进行调查研究.结果表明,土壤酸化程度不高,但酸化趋势较为明显,且随着使用年限的增加,pH值逐渐降低,电导率逐渐升高;有机质和碱解氮含量较低,有效磷和有效钾含量过高,随大棚使用年限增长无明显规律;因每棚施肥水平差异较大,肥料搭配不合理,存在过量施肥和偏重施肥,造成养分含量不均、营养失衡.因此,提出周期性检测土壤养分含量,做到“因土施肥”,通过合理搭配施肥,平衡养分含量.%In Taigu county,Jinzhong city,the variation characteristics of soil properties and nutrient in greenhouse at different planting years were researched.The results showed that level of soil acidification was relatively low,but the trend of acidification was obvious,with the increasing of ages in services,pH reduced gradually and EC of greenhouse soil increased gradually.And the content of organic matter and available N was low,yet available P and available K was excessive,it had unconspicuous law with increased planting years.The horizontal differentiation of fertilizer was huge,unreasonable fertilize such as excessive or partial result in imbalance nutrient.The nutrient content of greenhouse soil should be text periodically and balanced fertilization base on soil,keeping nutrient balance through reasonable comprehensive fertilization.