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于西瓜大棚内分别对连作2、4、8年的土壤铺设玉米秸秆生物反应堆,同时设立各自相应的对照,定期测定各处理土壤养分含量、pH值、土壤微生物数量和土壤酶活性等,以评价秸秆生物反应堆修复连作土壤、改善土壤健康状况的效应。结果表明,使用秸秆生物反应堆1年或2年之后,连作土壤有机质含量、土壤微生物数量、土壤多酚氧化酶、蔗糖酶活性等显著提高。连作8年的土壤连续2年使用秸秆生物反应堆后,土壤有机质含量达到了2.41%;土壤细菌数量为1.65×108CFU/g、放线菌为3.12×106CFU/g、真菌为0.5×105CFU/g,土壤中丛枝菌根(AM)真菌孢子密度达到57个/50mL,分别是对照的2.2、5、1.44、1.36和3.2倍;多酚氧化酶和蔗糖酶活性则分别是对照的1.25和2.13倍。表明秸秆生物反应堆处理对修复连作土壤、改善土壤健康具有一定作用。
The corn stalk bioreactor was laid in the watermelon greenhouses for 2-4 years respectively. At the same time, the corresponding control was set up, and the nutrient content, pH value, soil microbial quantity and soil enzyme activity of each treatment were measured regularly to evaluate The effect of straw bioreactor on soil remediation and soil health improvement. The results showed that the soil organic matter content, soil microbial quantity, soil polyphenol oxidase and invertase activity were significantly increased after one year or two years of using straw bio-reactor. The soil organic matter content reached 2.41% after two years of continuous cropping for two years using straw bio-reactor. The amount of soil bacteria was 1.65 × 108CFU / g, actinomyces was 3.12 × 106CFU / g, fungi was 0.5 × 105CFU / g, Arbuscular mycorrhizal (AM) fungi in soil had spore density of 57 / 50mL, which were 2.2, 5, 1.44, 1.36 and 3.2 times of that of the control respectively. Polyphenol oxidase and invertase activities were 1.25 and 2.13 times of the control, respectively . It shows that straw bioreactor treatment plays a certain role in rehabilitating continuous cropping soil and improving soil health.