论文部分内容阅读
在对美国紫叶矮樱(Prunus×cistena)造林时,应选择高产、无病虫害的优良品种。通过实践表明:密度不同对树木的生长状况、结实及种子的质量有一定影响,密度保留株数1 500~2 350株/hm2左右为宜;美国紫叶矮樱最佳修剪方法是中、重结合,即每株母树一半的枝条采用重度修剪,培养下年的结果枝,另一半的枝条中度修剪,用来本年度结果;不同肥料种类,增产效果不同,肥效长肥增产效果较好,可提高其果实种子产量。
In afforestation of the United States Prunus × cistena, we should choose a high yield, no pests and diseases of the fine varieties. Practice shows that: the density of different trees on the growth status, seed quality and have an impact, the density of the number of plants retained 1 500 ~ 2350 / hm2 is appropriate; American Prunus davidianus best pruning method is the combination of heavy , That is, half of each mother tree branches with heavy pruning, the training of the next year branches, the other half of the moderately pruned branches for the current year results; different types of fertilizers, yield different effects of fertilizer fertilizer effect is good, can increase Its fruit seed yield.