Study On Stem Flow Characteristics And Irrigation Schedule Of Malus Pumila Under Well Type Water Saving Irrigation

This experiment takes Malus pumila"red love"in Aksu area of Xinjiang as the research object,through the determination of the relationship between stem flow characteristics,stem flow changes and meteorological factors and fruit yield and quality,to determine the most reasonable irrigation amount in the three well irrigation treatments,and finally formulate a reasonable irrigation system,so as to provide scientific guidance for fruit farmers,increase fruit yield and quality,and improve fruit quality High income of fruit farmers.The main conclusions are as follows:(1)From June to September,the daily average value of stem flow of Malus pumila"red love"showed a pattern of"Ji"shape,which was higher in the day and lower in the night.The value of stem flow rate of Malus pumila showed the order of July>June>August>September;with the increase of irrigation amount,the start-up time and peak time of each treatment were advanced,and the decline time was delayed.(2)The change of stem velocity rate in sunny days of Malus pumila"red love"shows the change rule of single peak"several"shape,and the change law of multi peak curve in cloudy day;the stem flow rate of Malus pumila in sunny and cloudy days is consistent with the change of solar radiation.(3)During the growth period,solar radiation,temperature and relative humidity were the key meteorological factors affecting the stem flow of Malus pumila"red love",and the stem flow was significantly positively correlated with solar radiation and temperature,and negatively correlated with relative humidity.(4)The soil water content of 30 cm and 50 cm soil layer is the key soil factor of Malus pumila"red love"stem flow.(5)The daily cumulative amount,daily water consumption and monthly water consumption of the stem velocity rate of Malus pumila in different months were W3>W2>W1,and the daily cumulative amount,daily water consumption and monthly water consumption in different months were from July to June>August>September.The irrigation method of W3 treatment was the most scientific and reasonable.(6)The irrigation system of simplified Malus pumila orchard in Aksu area is as follows:During the whole growth period,there are 11 times of irrigation,including 2 times of flood irrigation and 9 times of well type water-saving irrigation.The annual irrigation quota is 426m~3/mu.