日光温室种植年限对土壤养分和重金属含量的影响

Effects of Planting Years on Soil Nutrients and Heavy Metals Content in Solar Greenhouse

试验研究不同种植年限日光温室土壤养分及重金属含量表明,随着日光温室种植年限的延长,土壤0~20cm土层的水溶性盐总量、有机质、全氮、碱解氮、全磷、速效磷、速效钾的含量呈逐步增加的趋势,与日光温室种植年限均呈极显著正相关。日光温室土壤中的重金属Cu、Mn、Zn、As与种植年限的相关性达到极显著,Pb与种植年限的相关性显著,Ni、Cr、Cd、Hg与种植年限的相关性不显著。

The experiment studied the nutrient content, heavy metal of the soil in sunlight greenhouse with different planting years. With prolonged cultivation in greenhouse, the content of the total amount of water-soluble salts, organic matter content, total nitrogen, alkali-hydrolyzable nitrogen, total phosphorus, available phosphorus and available potassium in the soil of 0~20cm layer showed a gradually increasing trend, and the correlation to the cultivation age was significant. The correlation between Cu, Mn, Zn, As and planting years reached the extremely significant, the correlation between Pb and planting years reached a significant level, but there is no significant correlation between Ni, Cr, Cd, Hg and planting years.