Studies on the breeding and forestation of broad-leaved trees

在这项研究中，在两年内进行了以下九项研究。1.对栎属植物的开花、授粉、花粉贮藏和人工授粉进行了研究。锯缘栎雌花的接受期为7-10天。锯缘栎种间杂交、皱纹栎种间杂交、锯缘栎种间杂交均获得了可育种子。2.以黄柏为试材，对其开花、人工授粉、花粉萌发、果实发育及马鞭草含量在种源和个体间的变异进行了研究。因此，选育和杂交育种是可行的。3.对锯缘栎种栽和直播造林进行了研究。结果表明，采用150~200 cm高的大规格苗木栽植是可行的，具有一定的优势。4.利用1-4年生大规格苗木进行了麻栎造林试验。结果表明，2年生100~120 cm的移栽苗最适合在大雪地区种植。IBDU地膜作业施肥促进了苗木的生长。5.11年生山杨林分坡面下部生长良好，坡面上部生长不良。在种植制度上，一行种植的生长效果最好。6.七叶树人工林12年生平均树高为3.61m，平均胸径为5.7 cm。不同种源或品系的生长情况也不同。7.20年生水曲柳人工林的平均树高为5.16~6.89m，平均胸径为3.4~6.1 cm。不同地区的增长情况有所不同。在陡坡上，所有栽植的树木都出现了树干弯曲。8.于1993年在戴森和伊鲁岑地区调查了金合欢林的结实情况和种子肥力。落粒数为229~984粒/m~2，良种率为22~55%。9.增长形式，

In this study, the following nine studies were performed during two years. 1.The flowering, pollination, pollen storage and artificial pollnation of Quercus species were studied. The recepive period of female flowers of Q.serrata was 7-10 days. Fertile seeds were obtained in interspecific crossing among Q.serrata, Q.crispula and Q.dentata. 2.Flowering, artificial pollination, pollen germination, fruit development and the variation of ververine contents aong provenances and individuals were studied using trees of Phellodenfron amurense. As a result, it was known that selection and hybridization breedings are practicable. 3.Forestation of Q.serrata by planting and direct seeding was studied. It was known that planting using large size seedlings of 150-200cm in height was practicable and it had some advantages. 4.Forestation of Q.acutissima was examined using 1-4 year old large size seedlings. It was known that 2 year old transplanted seedlings of 100-120cm in geight were most suitable for planting in heavy snow areas. The growth of planted seedlings was promoted by manuring with fertilizer of IBDU plastic operation. 5.The growth of P.amurense in 11-year-old stand was good in the lower part of slope and bad in the upper part of slope. As for planting system, the growth was best in a line planting. 6.The average tree geight and average DBH of 12-year-old man-made forest of Aesculus turbinata were 3.6lm and 5.7cm, respectively. And the growth differed according to provenances or strains. 7.The average tree height and average DBH of 20-year-old man-made forest of Fagus crenata were 5.16-6.89m and 3.4-6.1cm, respectively. The growth differed according to atrains. At the steep slope, stem butt crookedness occurred in all planted trees. 8.Fruit bearing and seed fertility in Fagus crenata forest were investigated in Daisen and Hiruzen areas in 1993. The number of mature seeds fallen was 229-984 seeds/m^2 and the percentage of sound seeds was 22-55%. 9.The growth form,