土壤改良剂施用对设施土壤微生物数量与酶活性及青菜生长的影响

Effects of soil conditioners on the soil microbial biomass and enzyme activities and the growth of green vegetables in greenhouse

在设施大棚中分别施用不同浓度的两种土壤改良剂——松壤与木霉菌剂,研究其对土壤微生物数量与酶活性的影响。结果表明:施用松壤后,连作土壤细菌与放线菌数量显著增加,微生物总量增加,土壤真菌总数无显著变化;施用木霉菌剂后,连作土壤细菌、放线菌及真菌数量增加,微生物总量增加。两种土壤改良剂施用均提高了脲酶、中性磷酸酶、蔗糖酶、纤维素酶、过氧化氢酶活性。此外,施用两种土壤改良剂均有利于青菜植株根系生长,设施青菜的长势和产量明显提高。

Two kinds of soil conditioners（loose soil and Trichoderma） with different concentrations were applied in greenhouse to study the effect of them on the soil microbial biomass and enzyme activities.The results showed that after application of loose soil,the number of bacteria and actinomycetes increased significantly,the total microbial biomass increased,the total number of soil fungi had no significant change in continuous cropping soil;after application of Trichoderma,the number of bacteria,actinomycetes and fungi increased,and the total amount of microorganism increased in continuous cropping soil.Both soil conditioners improved the activity of urease,neutral phosphatase,invertase,cellulase and catalase.Both soil conditioners were all in favor of root growth of green vegetables,and the growth and yield significantly increased.