论文部分内容阅读
近些年来新发展的果树以苹果数量最大,面积最广。但在栽培中新生幼树发生抽条现象较多,据1985—1988年四年观察,我省各地区均有发生,轻则一年生枝尖端干枯,重则所有枝条全部抽死,一直到根颈。1987年冬到1988年春各地抽条最多。一、二年生的幼树抽条最重,三年生树次之,以后随树龄的增加抽条现象逐渐减轻。但如果管理不当,即
In recent years, the newly developed fruit trees have the largest number of apples and the largest area. However, in the cultivation of newborn sapling phenomenon occurs more, according to the 1985-1988 four-year observation, all regions in our province have occurred, ranging from the tip of the annual dry branches, heavy all the branches all die, all the way to the root of the neck . From the winter of 1987 to the spring of 1988, the strokes were the most. One or two-year-old saplings strongest, followed by three-year-old trees, with the increase of the age of the spikes gradually reduced. But if not properly managed, that is