文冠果苗期种源试验

以6个不同种源的文冠果种子和1~2年生苗为试验材料，对其场圃发芽率、物候期、1年生播种苗年生长规律等进行对比分析。结果表明：山东蒙山和陕西淳化县种源场圃发芽率、苗高和地径生长量均优于其他4个种源；内蒙古翁牛特旗、陕西淳化县、甘肃灵台县、青海循化县和新疆巩留县种源萌芽、展叶、开花、结果等物候期会相应提前；山东蒙山、内蒙古翁牛特旗和甘肃灵台县种源为“雨季速生型”，而陕西淳化县、新疆巩留县和青海循化县种源为“雨季缓生型”；不同种源苗高、地径的广义遗传力为0898~0966，苗高的种源方差分量为7536%、8411%，地经的种源方差分量则为72.86%、8805%。山东蒙山、陕西淳化县2个种源，苗高、地径的遗传增益平均为1653%和842%。

Provenance Test of Xanthoceras sorbifolia in Seedling Stage

The nursery seed germination, phenology, growth rhythm of one year old and two year old seedlings of 6 provenances of Xanthoceras sorbifolia were comparatively studied. The results showed that the nursery seed germination,height and basal diameter of the one year old seedlings of provenances of Mengshan in Shandong and Wengniute County in Inner Mongolia were superior to those of the other four species. Owing to the better water and heat conditions, the sprouting stage, leaf expansion stage, flowering stage and fruiting stage of the two year old seedlings from provenances of Wengniute County in Inner Mongolia, Chunhua County in Shanxi, Lingtai County in Gansu, Xunhua County in Qinghai and Kongliu County in Xinjiang advanced correspondingly. In terms of growth rhythm, the provenances of Wengniute County, Mengshan County and Lingtai County were fast growing type in rainy season, while that of Chunhua County, Kongliu County and Xunhua County were slow growing type in the rainy season. The broad sense heritability for height and basal diameter of the 6 provenances varied from 0.898 to 0.966, and the variance components of basal diameter and seedling height of the 6 provenances varied from 7536% to 84.11% and 72.86% to 88.05% individually. The average genetic gain for height and basal diameter of Mengshan County provenance and Chunhua County provenance was 16.53% and 8.42%, respectively.