一、基本情况:我场矮化中间砧苹果密植园是1976年春建园,共6.2亩,栽前全国深翻80厘米,整成梯田,土壤为砾质粘土.速效氮为25.5ppm,速效磷为4.5ppm,速效钾为90ppm,苗木是本场自育二年出圃矮化中间砧苹果苗,质量较差(内有省果科所部分苗子)。基砧是难咽,中间砧多数是M4和M7,有少数 First, the basic situation: I dwarf the middle of the market anvil Apple plantation is the spring of 1976 to build Park, a total of 6.2 acres, planted throughout the country deep turning 80 cm, into the terrace, soil gravel clay. Available nitrogen 25.5ppm, available phosphorus 4.5ppm, available potassium 90ppm, nursery stock is the field of self-nursery dwarfing middle stump apple seedlings, the quality is poor (there is a part of the fruit branch of the province). Basal anvil is difficult to swallow, most of the anvil is M4 and M7, a small number