东陵区设施土壤有机质、pH值的剖面特征研究

对东陵区前竞赛镇和李相镇保护地土壤pH值、有机质含量进行分析。结果表明：与对照比较,保护地土壤酸化比较普遍,土壤酸化的程度正在扩大。从剖面上看,保护地土壤酸化是整个土体一起酸化。个别土壤酸化比较严重,pH值低于蔬菜作物所能适应的临界点,已经威胁到作物的正常生长。随着种植年限的增加,pH值逐渐降低,酸化问题变得越来越严峻。东陵区保护地土壤有机质含量明显高于露地对照土壤,且随着种植年限的延长呈增加趋势。由于长期大量施用单一种类有机肥（鸡粪）,土壤有机质含量增加,但有机质所起到的环境作用越来越低。

Study on Profile Character of pH and the Organic Matters in the Facility Cultivation Soils in Dongling Area

This paper studies the pH value and the organic matters in the facility cultivation soils collected from Qianjingsai and Lixiang in Dongling area.The results of the study indicate that compared with the control group,protected soil acidification is quite common,soil acidification degree is expanding.From profile,protected soil acidification is the whole soil acidification.Individual soil acidification is serious,ph value is lower than the critical point of vegetable crops can adapt.This has posted a threat ...