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[Microbial activity and functional diversity in rhizosphere of cucumber under different subsurface drip irrigation scheduling]. | LitMetric

AI Article Synopsis

Article Abstract

The effects of subsurface drip irrigation scheduling on microbial activity and functional diversity in rhizosphere of cucumber in solar greenhouse were studied in this paper. The results showed that the soil microbial biomass C and N, basal respiration, metabolic quotient and values of AWCD, Shannon and McIntosh indexes were increased at first and then decreased with the increase of irrigation water amount. The values of microbial C and N, basal respiration and metabolic quotient in I2 treatments were significantly higher than those in I1 treatments at the 0.8E(p) irrigation level. The numbers of bacteria, actinomyces and nitrogen-fixing bacteria, and the activities of urease, phosphatase, sucrase, catalase and polyhenoloxidase were significantly higher in the 0.8E(p) treatment than in the other treatments. The numbers of bacteria and nitrogen-fixing bacteria, the activities of urease, phosphatase and sucrase in I2 treatments were significantly higher than in I1 treatment, the actinomyces number and activities of catalase and polyhenoloxidase had no significant difference between I1 and I2 treatments, however, the fungi number in I2 treatments were significantly lower than in I2 treaments at the 0.8E(p) irrigation level. The microbial activity and functional diversity in rhizosphere of cucumber were strengthened in the I20.8E(p) treatment, meanwhile, the soil microflora was improved and the soil enzymes activities were enhanced, therefore, the cucumber growth was promoted as well.

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