论文部分内容阅读
我国自七十年代初掀起的果树密植栽培高潮以来,其规模、范围与进展情况都是前所未有的。经过多年的生产、研究实践,其效果究竟如何?有那些值得肯定的经验?还存在什么问题?其前景怎样?该是有个初步总结和看法的时候了。为此,我们带着这些问题,从6月12日至7月12日先后到河北、山东、辽宁等苹果主产区,进行了乔砧苹果密植的调查。得到了各有关单位领导及同行们的热情支持与协助,提供了宝贵的经验和资料。现将调查结果简结如下。一、渤海湾产区乔砧苹果密植概况自七十年代初以来,渤海湾产区的苹果乔砧密植栽培得到了很大发展。据初步统
Since the climax of planting densely populated fruit trees in our country in the early 1970s, the scale, scope and progress have been unprecedented. After years of production, research and practice, the effect of what exactly? Have those who can be affirmed experience? What are the problems? What is the future? There is a preliminary summary and view of the time. To this end, we take these issues, from June 12 to July 12 successively went to Hebei, Shandong, Liaoning and other main producing areas of Apple conducted an investigation of Qiao an apple close planting. It has received the enthusiastic support and assistance from the leaders and colleagues of relevant units and provided valuable experience and information. The survey results are summarized below. First, the Bohai Bay area ancestral ancestral Apple dense planting Overview Since the early 1970s, the Bohai Bay area apple acacia planting has been greatly developed. According to the preliminary system