Abstract: To analyses the effects of water deficit in different stages on the variation tendency of soil biological characteristics (soil invertase,urease,soil microbial biomass carbon,soil organic carbon)and the fruit yield and quality of greenhouse grape under delayed cultivation,the experiment was carried out at Zhangye Irrigation Experiment Station in Gansu Province in 2013-2015.The results showed:water deficit treatment during germination and shoot growth stage could improve soil invertase activity.There was no difference in water deficit treatment in flowering period compared with CK treatment.The treatment of water deficit at the fruit expanding stage and the coloring maturity stage could inhibit the activity of soil invertase.The germination period was the most suitable period to improve the activity of soil invertase by water deficit.The treatment of water deficit at the germination stage and at the color maturity stage could inhibit the activity of soil urease.The water deficit treatment from the shoot growth stage to the fruit expanding stage could improve the soil urease activity in the corresponding growth stage.For the soil microbial entropy,the treatment of water deficit at the growth stage of new shoots had a significant effect on it.According to the results of correlation analysis and canonical correlation analysis,the soil invertase activity increased with the increased of fruit yield,while the content of soil microbial biomass carbon decreased significantly.The content of titratable acid increased significantly when soil urease activity increased.

Key words: Water deficit, Facilities delayed cultivation of grapes, Soil biological characteristics, Soil microbial entropy, Canonical correlation analysis

CLC Number: 

• S154