中文摘要：

为缓解当归连作障碍问题,在甘肃省岷县连作2年当归田,设置当归与油菜、蚕豆、大蒜、小麦和燕麦5种植物间作种植试验,以当归单作为对照,测定不同时期当归生长发育状况及产量,探讨利用作物间作缓解当归连作障碍的可行性。结果表明,在各生育时期,当归/大蒜的当归株高最高。在当归苗期和根膨大期,当归/大蒜的当归地上部干物质重比单作当归分别高31.51%和21.28%;在当归苗期、根膨大期和收获期,当归/大蒜的当归地下部干物质重比单作当归分别高25.00%,36.65%和54.75%。在苗期、根膨大期和收获期,当归/大蒜的当归根茎粗分别比单作当归提高12.26%,4.80%和24.38%。当归/燕麦对各生育期当归地上和地下部干物质具有明显抑制作用,并且其抑制作用最强。油菜、蚕豆、大蒜、小麦、燕麦与当归间作的麻口病发病率分别比当归单作降低46.05%,43.31%,25.24%,2.34%和12.82%。当归/大蒜的一等归出成率和二等归出成率比当归单作分别提高118.62%和27.82%。当归/大蒜的当归产量（1 946.53kg/hm2）比当归/油菜、当归/蚕豆、当归/小麦、当归/燕麦和当归单作分别提高67.29%,143.31%,207.57%,683.06%和34.71%。不同间作模式对当归出苗率和抽薹率产生影响,但影响不显著。当归/大蒜能提高当归产量和优等归出成率,并能适当减少当归麻口病,因此当归/大蒜对减缓当归连作障碍有一定作用。

英文摘要：

In order to alleviate or overcome obstacles of continuous mono-cropping in Angelica sinensis planting,a controlled study was conducted on 2 years continuous mono-cropping of A.sinensis planting filed in Min County,Gansu Province at 2011.The five intercropping patterns were angelica/rape,angelica/broad bean,angelica/garlic,angelica/wheat and angelica/oat,respectively,and mono-cropping angelica was concerned as a control.The growth characters and yield of A.sinensis were studied under the 6 cropping patterns.The plant height of angelica was the highest in angelica/garlic planting at all the growth stages among all treatments.At the seedling and rootstock thickening stage,increases of dry matter of angelica above ground under angelica/garlic planting were 31.51% and 21.28%,respectively,compared with mono-cropping angelica planting.At the seedling,rootstock thickening and harvesting stage,increases of dry matter of angelica underground under angelica/garlic planting were 25.00%,36.65% and 54.75%,respectively,and increases of root stem diameter of angelica under angelica/garlic planting were 12.26%,4.80% and 24.38%,respectively,compared with mono-cropping angelica planting.The dry matter of angelica above ground and underground decreased under angelica/oat planting.Compared with mono-cropping angelica planting,decreases of incidence of angelica Ditylenchus destructor were 46.05%,43.31%,25.24%,2.34% and 12.82%,respectively,under angelica/rape,angelica/broad bean,angelica/garlic,angelica/wheat and angelica/oat planting,and increases of the first-class and the second-class of angelica were 118.62% and 27.82% under angelica/garlic planting.Yields of angelica reached 1 946 kg/hm2 under angelica/garlic planting,and increases of yields of angelica under angelica/garlic planting were 67.29%,143.31%,207.57%,683.06% and 34.71%,respectively,compared with angelica/rape,angelica/broad bean,angelica/wheat,angelica/oat and mono-cropping angelica planting.Intercropping patterns had effects on the emergence rate and bolting percentage