Abstract: To search for the effect of different fertilizations on the microenvironment of greenhouse soil,four kinds of long-term fertilization treatments were set up, i.e. no fertilizer (CK),chicken manure +straw fertilization (M+S),chicken manure+urea fertilization (M+U) and chicken manure+urea+straw fertilization (M+U+S), and dynamic changes of the greenhouse soil nutrients and enzyme activities throughout the growth stages of tomato were studied.Results revealed that the highest activities of invertase and cellulase appeared in the first-fruit stage, while those of urease and acid phosphatase happened in the full-fruit stage, and the fruit-harvest stage witnessed the highest amount of soil organic matter (OM). Both the soil salt concentration and the pH value were significantly reduced after the practice of straw return with high ratio of carbon/nitrogen (C/N), while the contents of soil total nitrogen (TN), OM, available P (AP), available K (AK),and alkalified N(AN) were significantly enhanced by 8.92%-40.71%, 9.54%-18.52%, 23.65%-27.87%, 13.53%-58.81% and 13.20%-18.25%, respectively; and the activity units of invertase, cellulase, urease and acid phosphatase were significantly increased by 13.95-17.93, 79.35-103.56, 11.50-15.73 and 4.30-8.00.Compared with CK treatment, input of nitrogen-based fertilizer significantly increased the level of soil secondary salinization, and reduced the soil pH and the urease activity in M+U treatment.Application of organic manure significantly increased the content of TN, OM, AP, AK and AN, and enhanced the activities of invertase, cellulase and acid phosphatase. Besides, it was positively correlated between the activities of invertase, cellulose, acid phosphatase and the contents of TN, OM, AP, AK and AN, and between urease and TN.However, there was no obvious correlation between hydrogen peroxidase and all soil nutrients.

Key words: Facility agriculture, Soil enzyme, Dynamics

CLC Number: 

• S158