苹果苗木栽后,加强土、肥、水管理,对于培养整齐、健壮的幼树十分重要。在连年秋季改土施肥条件下,根量以20~40厘米土层中最多,其次是0~20厘米土层,其他土层根量随土层加深呈递减趋势。在未改土施肥的条件下,根量由浅到深呈递减趋势。因此,连年改土施肥可提高下层土壤肥力,对增加根量和诱导根系深扎有良好效果。 Apple seedlings planted to strengthen soil, fertilizer, water management, for the training of tidy, robust saplings is very important. Under the conditions of soil fertilization in successive autumn, the amount of roots was the largest in 20-40 cm soil layers, followed by 0-20 cm soil layers, and the other soil layers decreased with soil depth. Under the condition of no soil improvement and fertilization, the root volume decreased gradually from shallow to deep. Therefore, successive years of soil fertilization can improve the underlying soil fertility, to increase the amount of roots and induce deep roots have a good effect.