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一、选地山海关林场系山区场,本着科研为生产服务的原则,种子园应建在林区内。但因大面积的宜林地已基本绿化;零星小块宜林地虽然不少,但到处都有散生油松,不适于建园,故选在沙河子苗圃。面积10亩,是大田地。土壤系做碱性沙壤,耕作层下部是肥力较差的火性黄沙。二、建园(一)定植砧木:在嫁接技术没有过关的前提下,为尽快建起种子园,在定砧的同时进行嫁接试验。于1974年4月进行定植。定植的方法是:带状定植,带长130米,带宽1米,带距4米,
First, the election Shanhaiguan forest farm is the mountain field, in the principle of scientific research for the production of services, seed orchard should be built in the forest. However, due to the large area of the forest has been the basic afforestation; sporadic small pieces should be a lot of forest, but scattered everywhere pine, not suitable for building parks, it was elected Shahezi nursery. An area of 10 acres, is the field. The soil is made of alkaline sandy soil, and the lower part of the tillage layer is the erotic yellow sand with poor fertility. Second, the park (a) planting rootstock: grafting technology without clearance under the premise of a seed garden as soon as possible to establish a rootstock at the same time for grafting test. Colonization in April 1974. The method of planting is: banded planting, with a length of 130 meters, a width of 1 meter, with a distance of 4 meters,