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在测定陇东黄土高塬苹果树叶片全氮含量、百叶干重、苹果园土壤养分含量和苹果树根系分布范围的基础上确定了土壤养分供应量 ,根据干周法和栽植密度确定了丰产、优质苹果园的计划产量及计划施肥量 ,并提出了该地区苹果园合理施肥建议
The nutrient supply of soil was determined on the basis of determining the total nitrogen content of apple leaves, the dry weight of blinds, the soil nutrient content of apple orchard and the distribution range of apple tree roots in Longdong Loess Plateau. According to dry cycle and planting density, Planned output of high-quality apple orchards and planned amount of fertilizer, and put forward suggestions for the rational fertilization of apple orchards in the area