苹果叶面肥“高效林果宝”增产显著此肥是山东省林业厅高科技新产品。本试验在苹果树生长季节，于５月中旬，（生理落果期）８月下旬，９月中旬（果实膨大期），各喷一次２００倍的高效林果宝溶液，对增加叶绿素，提高光合率，增加产量，提高品质、增加糖度、色泽，作用明... Apple foliar “efficient forest treasure” significant increase in production This fertilizer is high-tech new products of Shandong Provincial Forestry Department. This experiment in the apple tree growing season, in mid-May, (Physiological deciduous) in late August, mid-September (fruit enlargement), each spraying a 200 times high-efficient fruit treasure solution to increase chlorophyll and increase photosynthetic rate , Increase output, improve quality, increase sugar content, color, effect ...