Abstract:

In order to improve the excavated soil and apply microbiological fertilizer in degraded soil restoration, based on indoor experiment, soil nutrient, enzyme activity and microbial biomass affected by patented product AB (activation bacterium) biological-organic fertilizer were studied. The results showed that, compared with CK, the application of the biological-organic fertilizer increased soil microorganisms significantly, and raised the soil nutrient content and microbial biomass C, N content, increased soil enzyme activities significantly. The number of N-fixing bacteria, P-releasing bacteria, K-releasing bacteria of AB biological-organic fertilizer treatment increased by 4-6 times, 4-7 times and 5-8 times respectively compared with the CK. The content of total N, available N, P and K increased by 0.6-0.8 times, 0.8-1.4 times, 2.5-3.2 times and 0.3-0.9 times respectively compared with the CK. The activity of urease, neutral phosphatase and invertase increased by 0.4-0.5 times, 1.7-2.1 times, 0.4-0.7 times respectively compared with the CK. The content of organic matter, microbial biomass C, N increased by 1.1-2.0 times, 0.8-1.7 times and 3.1-7.6 times respectively compared with the CK. At the same time, with the time prolonging, this indicator in CK had no significant changes.