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在1989年,公众对果农用 B_9大量取代化学试剂表示强烈不满。这就导致大量果农去寻找一种替代 B_9的措施,来减少树的生长量和采前落果,改进果实着色的品质。利用机械进行根系修剪是一些果农考虑采用的方法。1982年以来在俄亥俄农业研究和试验中心和1988年以来在缅因大学,对根系修剪作了比较详细的研究。对结果树的影响:概括地说,对结果苹果树进行根系修剪,能减少树的总生长量。由于整个季节内生长被抑制,所以地上部修剪时间被缩短。根系修剪对座果没有影响,所以净
In 1989, the public expressed strong dissatisfaction with the large amount of chemical reagents that B_9 replaced by fruit growers. This led to a large number of farmers to find an alternative B_9 measures to reduce the amount of trees and fruit drop before harvest, improve the quality of fruit coloring. The use of mechanical root pruning is some of the methods that fruit growers are considering. Since 1982, at the Ohio Agricultural Research and Experiment Center and at the University of Maine since 1988, a more detailed study of root pruning has been conducted. Effect on the result tree: In summary, root pruning of the resulting apple tree reduces the total tree growth. As the growth is suppressed throughout the season, so the above-ground pruning time is shortened. Root pruning has no effect on the fruit, so net