2个中晚熟黄绿色免套袋苹果新品种在昭通引种表现及栽培技术要点

‘中田’‘青林’是自日本引进的黄绿色中晚熟苹果新品种，‘中田’果实短圆锥形，平均单果重228.12g，果面黄色，果肉黄白色，肉质细嫩，质地松脆，酸甜适度，可溶性固形物16.92%，带皮硬度7.28kg/?，可滴定酸含量0.41%，VC含量6.86mg·100g-1；‘青林’果实近圆形，平均单果重217.34g，果面采收时绿黄色，后逐步变黄色，果肉黄白色，肉质细嫩，质地硬脆，酸甜适度，可溶性固形物16.63%，带皮硬度9.82kg/?，可滴定酸含量0.32%，VC含量6.48mg·100g-1。两个品种鲜食品质佳，果实常温条件下可保存35～40天。

Introduction performance and key cultivation techniques of two new varieties of medium ripe yellow/green and bagging-free apples in Zhaotong

‘Zhongtian’‘Qinglin’ are new mid-late ripening and yellow/green apple varieties.Introduced from Japan in 2015 by Shaanxi Haisheng Group Company and graft on M9T337, Zhaotong Chaoyue Agriculture Co.,Ltd got 2-year-old seedlings scions to Zhaotong in 2018 and planted in 2019 spring, the spacing between plants and rows was 1.0m×3.5m, 191 plants 667m2. ‘Golden Delicious’ was the control variety and the same cultivation conditions. From 2020, selected 5 rows of fruit trees in the orchard randomly and conducted surveys for 3 years consecutively.''Zhongtian'' fruitis short conical shape, average single fruit weight is 228.12g, the fruit is yellow peel, the surface is smooth, non-arris and waxy, and the fruit dots are medium large and medium dense.The fruit flesh is yellowish white, tender and crisp taste and sweet flavor,with soluble solids content of 16.92%, skin hardness of 7.28kg/?, titratable acid content of 0.41% and vitamin C content of 6.86mg·100g-1; ''Qinglin'' fruitis nearly circular shape, average single fruit weight is 217.34g, the fruit is green peel during harvesting, and gradually turns yellow peel afterwards, the surface is smooth, non-arris and waxy, and the fruit dots are medium large and medium dense.The fruit flesh is yellowish white, hard and crisp taste and sweet flavor taste and sweet flavor,with soluble solids content of 16.63%, skin hardness of 9.82kg/?, titratable acid content of 0.32% and vitamin C content of 6.48mg·100g-1. The two varieties have excellent fresh food quality, and the fruits can be stored for 35-40 days at room temperature.