尽早为大面积植树造林提供良种,是当务之急。我们从1975年起做了营建日本落叶松改接种子园试验。改接种子园是利用原有的适龄日本落叶松幼林,按建园要求选定幼树,作培养对象,用优良母树上的接穗嫁接,然后将其余非培养对象逐步伐除而培育成功的种子园。这种方法能加快建园速度,提高结实品质,降低建园成本。由于我们初次进 As soon as possible to provide large-scale afforestation seed, is a top priority. We started from 1975 to build a Japanese larch replant seed garden test. Replaced seed garden is the use of the original age-appropriate young Larix kaempferi, according to the requirements of the construction of young saplings selected for cultivation of objects, with good mother tree scion grafting, and then gradually remove the remaining non-cultivated objects and cultivate successful seed garden. This method can speed up the construction of parks, improve the quality and reduce the cost of building gardens. As we first entered