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在大力推广沙兰杨的同时,为丰富我县优良品种,1977年冬,我所从江苏省引进了八个意大利杨树新品种.经过苗木繁育,1979年春进行了造林试验.一、试验地条件及造林管理技术:试验地设于洛宁县林科所院内.海拔380米,地势平坦.土壤为褐色粘土,PH值7左右.土层深厚,较肥沃,有水灌溉.气候特点是:冬季寒冷,春季干旱,夏季炎热多雨.全年平均气温13.7℃,年绝对最高气温42℃,绝对最低气温-21.3℃.年降水量727.5-954.7毫米,多集中在7、8、9三个月.
While vigorously promoting the Sallaeo Yang, in order to enrich the fine varieties in our county, I introduced eight new Italian poplar varieties from Jiangsu Province in the winter of 1977. After seedling breeding, the afforestation experiment was conducted in the spring of 1979. First, the experimental conditions and Afforestation Management Techniques: The experimental site is located in the Lin-nuo Institute of Luoning County, with an elevation of 380 meters and a flat terrain. The soil is brown clay with a PH value of about 7. The soil layer is deep and fertile with water irrigation. The spring drought, the summer hot and rainy.The annual average temperature of 13.7 ℃, the absolute maximum temperature of 42 ℃, the absolute minimum temperature of -21.3 ℃ .Annual precipitation of 727.5-954.7 mm, mostly concentrated in 7,8,9 three months.