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引进美国东部黑核桃家系10个在鲁中丘陵区进行栽培对比试验。观测调查了各家系造林成活率、保存率、生长量、干形、分枝特性、开花结实特性等,统计分析了4年生和5年生各家系树高、胸径和冠幅生长量及差异,结果说明引进的10个家系均为优良家系。计算了树高和胸径的遗传力,结果是黑核桃2个生长性状均有中等以上的遗传力。描述了各家系果实的形状、大小和重量。
The introduction of the eastern United States black walnut family of 10 in the hilly areas in the cultivation contrast test. The survival rate, conservation rate, growth rate, dryness, branching characteristics and flowering and fruiting characteristics of each family were observed and observed. The growth and differences in tree height, DBH and crown width between four-year and five-year old families were statistically analyzed , The results show that the introduction of 10 families are good families. The heritability of tree height and DBH was calculated. The results showed that the two growth traits of black walnut had more than moderate heritability. Described the shape, size and weight of the fruits of each family.