苹果是多年生作物.如何充分利用光合作用利用率,提高可食部分的比率,达到最大限度的高产稳产,并从中找出高产的丰产参数,是当前国内外苹果栽培研究的中心内容之一.我们认为,大面积平均亩产4,000斤以上的可视为高产园,亩产2,000～4,000斤之间的可视为中产园;亩产2,000斤以下的为低产园.丰产参数是指与年年高产有关的一些参考数值. Apple is a perennial crop.How to take full advantage of photosynthesis utilization, improve the edible part of the ratio, to achieve the maximum yield of high yield, and to find high yield and high yield parameters, is the current apple cultivation at home and abroad one of the core content of our It is considered that a large-area average yield of 4,000 kg or more can be regarded as a high-yielding garden and a yield of 2,000-4,000 kg per mu can be considered as a middle-yielding garden. A yield of less than 2,000 kg per mu is a low-yielding garden. For some reference values.