Abstract:
‘Yanfu 6’/M26/Malus robusta in Weibei area were used as experimental materials, four different water control methods were used, which were CK(full irrigation 75%θf at both early fruit growth stage and middle fruit growth stage, θf is the field water holding capacity),W1(slight deficit irrigation 50%θf at both early fruit growth stage and middle fruit growth stage),W2(slight deficit irrigation 50%θf at early fruit growth stage and full irrigation 75%θf at middle fruit growth stage),W3(75%θf was fully irrigated in the early stage of fruit growth and 50%θf was slightly deficient in the middle stage of fruit growth).The effects of different water control methods on apple yield, quality and water use efficiency were analyzed, in order to provide reference for water-saving and efficient utilization of apple in this area, the mechanism of water control was explored.The results showed that compared with CK,soluble solids content, fruit surface chroma L
* and a
* and irrigation water use efficiency of the other three water-controlled treatments were increased, while yield, water consumption and water use efficiency were decreased significantly.The overall trend of WUE of different controlled water was CK>W2>W3>W1,while the IWUE of W2 was significantly higher than that of CK,which increased by 22.2%.In this experiment, the comprehensive satisfaction of apple fruit quality and water use efficiency under four kinds of water control methods was comprehensively compared.In conclusion, the comprehensive satisfaction of W2 treatment was the highest, and the order from high to low was W2,CK,W3 and W1.