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土壤水溶性盐和酶活性是土壤健康的重要指标,可以反映保护地土壤盐渍化趋势与生物学特性。对洛阳近郊李楼乡不同种植年限及不同层次的蔬菜保护地土壤水溶性盐与酶活性进行了研究,结果表明,小麦玉米轮作地和不同种植年限的保护地中土壤水溶性盐总量都在土壤表层积累;保护地土壤的水溶性总盐量在种植年限1～5 a时显著增加,随着种植年限的增加逐渐降低,但仍显著高于小麦玉米轮作地。保护地土壤中过氧化氢酶活性随着土层深度增加而增加,脲酶和蔗糖酶活性有随土层深度增加而减弱的趋势。保护地在一定年限(1～5 a和5～10 a)的蔬菜种植下,其土壤水溶性总盐量与土壤酶活性之间相关性不显著,但随着种植年限的增加,土壤总盐量与脲酶和蔗糖酶活性呈显著正相关。
Soil water-soluble salts and enzyme activities are important indicators of soil health, and can reflect the trend of soil salinization and biological characteristics of protected areas. The results showed that the total amount of water-soluble salts and enzymes in soil protected by vegetable rotation in wheat growing areas and different years of planting were all in the range of Soil surface accumulations; total soluble salt content of soil in protected areas increased significantly from 1 to 5 years of planting and gradually decreased with increasing planting years, but still significantly higher than that of wheat and corn rotation. The activities of catalase in the soils increased with soil depth increasing, and the activities of urease and sucrase decreased with soil depth increasing. Under the vegetable cultivation of protected areas for a certain period of time (1 ~ 5 a and 5 ~ 10 a), the correlation between soil water-soluble total salt and soil enzyme activity was insignificant, but with the increase of planting years, total soil salt There was a significant positive correlation between urease and invertase activity.