【摘要】 以木霉菌、北虫草废弃培养基、古龙酸母液为材料制备生物有机肥,将其以低(7.5 t·hm^-2)、中(15 t·hm^-2)、高(30 t·hm^-2)3种用量施于未连作以及连作3、7、11 a的设施黄瓜土壤中,测定生物有机肥对连作土壤的改良效果。结果显示,在相同生物有机肥用量下,土壤细菌、放线菌、木霉菌数量,土壤蔗糖酶、脲酶、磷酸酶、过氧化氢酶活性,土壤质量隶属度,以及黄瓜产量和品质指标（维生素C、可溶性糖含量）随连作年限的延长整体表现为先升高后降低,土壤真菌、尖孢镰刀菌数量则随着连作年限延长呈现不断增加的趋势。相同连作年限下,土壤微生物数量、酶活性、黄瓜产量和品质整体随生物有机肥用量的增加而提高。本研究表明,该生物有机肥能够改善连作土壤的生态质量以及作物的产量和品质,用量越高对连作年限越久土壤的改良效果越好。更多还原

【Abstract】 In the present study, bio-organic fertilizer was made from trichoderma, abandoned north Chinese caterpillar fungus medium and gulomic acid residue after evaporation. The low(7.5 t·hm^-2), medium(15 t·hm^-2), high(30 t·hm^-2) dosage bio-organic fertilizer was applied in non-continuous cropping soil and protected cucumber continuous soil of 3, 7, 11 years, respectively, and soil microbial population, enzymes activities and amelioration effect were determined. The results showed that the quantity of soil bacteria, actinomycetes, trichoderma, activities of soil invertase, phosphatase, urease, catalase, soil quality membership value, and the yield and contents of vitamin C and soluble sugar of cucumber were enhanced at first and then decreased with the increasing continuous cropping years under the same application rate of bio-organic fertilizers. However, the quantities of soil fungi and Fusarium oxysporum were increased with the increasing continuous cropping years. Under the same continuous cropping years, the quantity of soil microbes, activities of soil enzyme, yield and quality of cucumber were enhanced with the increasing application rate of bio-organic fertilizer. This bio-organic fertilizer could ameliorate ecological quality of continuous cropping soil, yield and quality of cucumber, and its amelioration effect on soils with was enhanced with higher application rate on soils with longer continuous cropping years.更多还原