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对从北美引进的9个种源班克松所做的17a的试验结果表明:班克松是适合辽宁地区的一个优良速生树种,在各个生长时期的生长表现都要好于乡土速生针叶树种———樟子松。班克松不同种源之间的生长状况存在着较大差异,班克松各种源树高、胸径、材积生长在2年生苗期、造林后5年生、8年生、15年生时差异都达到极显著水平。2、8号种源班克松15年生时的生长表现最佳,它们的树高分别比9个种源平均高大4.8%、4.8%,胸径分别比9个种源平均胸径大8.2%、4.9%,材积分别比9个种源平均材积大21.1%、13.5%;而3、5号种源班克松15年生时的生长表现最差。班克松的树高、胸径、材积生长状况与纬度因子呈显著负相关,来自北美北纬46°附近的班克松种源是最适合辽宁地区引种的优良种源,而远离北纬46°及越向高纬度地区的班克松种源在该区表现较差。建议辽宁地区引进北美北纬46°附近的班克松种源,并建立起优良的班克松种子园。
The results of 17a tests conducted on 9 provenances introduced from North America showed that Bancroft was an excellent fast-growing tree suitable for Liaoning Province and its growth performance at all growth stages was better than that of native coniferous species - - Pinus sylvestris. The differences of growth status among different provenances of Magnolia bungeanum were significant. The tree height, diameter at breast height and volume were all increased at 2-year-old seedling stage, after 5 years, 8 years and 15 years after afforestation Very significant level. The growth performance of 2, 8 provenances was best when they were 15 years old, and their tree height was 4.8% and 4.8% higher than that of 9 provenances respectively. The DBH was 8.2% and 4.9% % And volume were 21.1% and 13.5% larger than the average volume of 9 provenances, respectively. However, the growth performance of Bankersulfuron # 3 and # 3 at the 15th year of life was the worst. The tree height, DBH and volume growth of Bancrong were negatively correlated with the latitude factor. The source of Bancroft pine from the north latitude of 46 ° N is the best provenance for introduction in Liaoning Province, and far away from 46 ° North latitude The Bancroft provenances in high latitudes performed poorly in this area. It is recommended that Liaoning Province introduce the provenances of Bancroft near 46 ° North Latitude in North America and set up an excellent Bankers Seeds Park.