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(二)采取集约化的综合管理措施,实现稳产高产美国为促进苹果的高产稳产所采取的主要栽培技术措施是:1.采取多种途径,努力发展矮化密植栽培大力发展矮密栽培是美国苹果增产的重要途径和发展方向。长期生产实践证明:在一定范围内,降低树冠高度,缩小树冠枝展,增加单位面积的株数,对提高产量,增进品质起很大作用,并能提高工效和经济收益。诚然,在建园过程中密度越大,投资越高,但
(B) to take intensive integrated management measures to achieve stable and high yield The United States to promote high and stable production of apples to take the main cultivation techniques and measures are: 1. To take a variety of ways, efforts to develop dwarf and close planting vigorous development of low-density cultivation is the United States The Important Way and Development Direction of Apple Increasing Production. Long-term production practice has proved that: within a certain range, reducing the height of the canopy, reducing crown branch exhibition, increasing the number of units per unit area, to improve production and improve quality play a significant role, and can improve ergonomics and economic benefits. It is true that the greater the density during the construction of the park, the higher the investment