Study on water requirement and water consumption of'Shine Muscat'grape
In order to determine the water requirement of'Shine Muscat'grape during growing season and to provide theoretical basis for water-saving irrigation,the effective rainfall was investigated and water budget was calculated in the'Shine Muscat'grape vineyards.Then,three irrigation amount treatments(1 500 m3/hm2,2 250 m 3/hm2,3 000 m3/hm2)were set up on the basis of the water budget.The influence of the different irrigation amount on the leaf water potential,canopy cover rate,leaf area index,fruit quality and water consumption characteristics of grape,the water requirement of grape was determined and the water consumption law was revealed.The results showed that no significant difference was found in soluble sugar content,soluble solids content and solid acid ratio between the 2 250 m3/hm2and 3 000 m3/hm2 irrigation amount treatments,but they were significantly higher than the treatment of 1 500 m3/hm2 irrigation,respectively.Under 2 250 m3/hm2 irrigation,the fruit quality could be maintained and the irrigation was saved.The water consumption law of grape under different irrigation amounts was fruit expanding period＞fruit maturity period＞new shoot growth period＞flowering period.The water requirement of'Shine Muscat'grape was 5 539 m3/hm2.
grape'Shine Muscat'leaf water potentialwater requirementevaporationtranspiration
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