沙滩地果园慎防苹果小叶病苹果小叶病是一种缺锌生理病害。砂土、砂壤土及沙滩地含锌盐少，且易流失，不易被植株吸收利用，所建苹果园苹果小叶病发生较重。病树萌芽晚，新梢节间极短，顶端簇生小叶，萌芽后很快停长。叶片狭细短小，质硬且脆，呈浓淡不匀的黄绿色，叶缘锯... Sandy orchard to guard against Apple leaflet Apple leaflet disease is a lack of physiological zinc deficiency. Sand, sandy loam and sandy land contains less zinc, and easy to loss, not easy to be absorbed by plants, the apple orchards in the construction of apple leaflet disease heavier. Emergence of diseased trees late, the new shoots internodes very short, top tufted leaflets, sprout soon after the suspension. Short narrow blade, hard and brittle, uneven yellowish green, leaf edge sawing ...