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对黄土高原丘陵沟壑区小叶杨（Ｐｏｐｕｌｕｓ ｓｉｍｏｎｉｉ）、沙棘（Ｈｉｐｐｏｐｈａｅ ｒｈａｍｎｏｉｄｅｓ）混交 林和小叶杨纯林生物量进行了研究，同时应用Ｍｉａｍｉ模型和Ｔｈｏｒｎｔｈｗａｉｔｅ Ｍｅｍｏｒｉａｌ模型对 林分气候生产潜力进行了分析。结果表明，小叶杨、沙棘混交林与小叶杨纯林相比，混交林能够 显著提高林分生物量和生产力，能有效地利用当地气候资源，小叶杨与沙棘混交林林分生物量 为４０．４４２ｔ／ｈｍ２，小叶杨纯林的生物量为２０．７１０ｔ／ｈｍ２，混交林是纯林的１．９５倍；小叶杨、沙 棘混交林的生产力比纯林小叶杨生产力提高了４０．９％。小叶杨、沙棘混交林是适于黄土丘陵 区发展的混交林类型。
The biomass of pure Populus simonii, Hippophae rhamnoides mixed forest and Populus simonii forest in the hilly and gully regions of the Loess Plateau was studied. The climate potential productivity of the forests was also analyzed using the Miami model and the Thornthwaite Memorial model. The results showed that the mixed forest can significantly improve stand biomass and productivity, mixed use of local climate resources, Populus simonii and sea buckthorn mixed forest stand biomass was 40.442t / Hm2, the biomass of pure Populus simonii was 20.710t / hm2 and that of mixed forest was 1.95 times of that of pure forest. The productivity of Populus simonii and Hippophae rhamnoides mixed forest was increased by 40.9% compared with that of pure Populus simonii. Populus simonii, sea buckthorn mixed forest is suitable for the development of the loess hilly region mixed forest types.