试验地在祁县昌源河水利处的丘陵梯田果园,海拔805-852m,土层较厚,沙壤土,pH7.8-8.0,有机质含量0.6%左右,年平均降水量576.4mn。 试材均为5年生,基砧为山定子;栽植行株距为4 ×3m,树冠呈少主枝扁平小冠疏层形;果园管理水平中等。试验采取随机区组排列,单株小区,九个处理,重复四 The test ground is in the hilly terraced orchard of Qiyuan Changyuan River water conservancy. It is 805-852m above sea level with thick soil, sandy loam soil, pH7.8-8.0, organic matter content about 0.6% and annual average precipitation 576.4mn. The test materials are all 5-year-old, with the root anvil being the mountain statues. The planting line spacing is 4 × 3m. The tree crown is sparsely layered with small main branches and flat spheres. The orchard management level is medium. Randomized block test arrangement, single plot, nine treatment, repeat four