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北京地区的苹果树,多是1958年前后发展起来的,现已进入盛果期。但存在产量不高和大、小年现象,不能满足市场的需要。为此,我们于1974年在白家疃进行了苹果的高产、稳产栽培及有关指标的技术试验。历经五年的研究,红星苹果年平均亩产6717.5斤,比对照园
Apple trees in Beijing, mostly developed around 1958, have now entered the flourishing period. However, the output is not high and large, small year phenomenon, can not meet the needs of the market. To this end, we conducted a high-yielding, stable-yielding cultivation of apples and technical tests on indicators in Baijiatuo in 1974. After five years of research, Red Star Apple average annual yield of 6717.5 kg, compared with the control garden