关键词: 蚯蚓粪, 微生物菌肥, 土壤化学性质, 土壤酶

Abstract:

In order to study the effects of different soil amendments on soil chemical properties and soil enzyme activities in continuous cropping tobacco cultivation, and relationship between soil enzymes and soil chemical properties, this experiment collected and analyzed the tobacco rhizosphere soil at 30 d, 50 d, 70 d and 90 d after transplantion, discussed the relationship between soil chemical properties and soil enzyme activity by combining simple correlation analysis, canonical correlation analysis and factor analysis. The results showed that wormcast and microbial fertilizer could significantly improve the soil quality in continuous cropping tobacco cultivation and increase soil nutrient contents, and soil enzyme activity. There was a strong correlation between soil chemical properties and soil enzyme activities. Results of canonical correlation analysis showed that the soil environmental factors, which had the most significant effects on soil fertility, were urease activity and content of alkali solution nitrogen. The content of nitrogen in soil for continuous cropping tobacco cultivation was the key factor affecting soil quality. The results of factor analysis showed that urease, phosphatase, alkaline hydrolysis nitrogen, catalase and available potassium 5 indexes could be used for certain extent to characterize soil fertility, which was higher load on the first principal component. Soil enzyme activities and soil chemical properties could be used commonly to evaluate the level of soil comprehensive fertility.

Key words: wormcast, microbial fertilizer, soil chemical properties, soil enzyme