采用定位试验，研究不同栽培模式对胡麻土壤酶活性及产量变化特征的影响。结果表明，在0～20 cm耕作层，胡麻与小麦轮作、胡麻连作、胡麻与小麦间作模式下土壤蔗糖酶、脲酶、过氧化氢酶活性变化规律具有明显的相似性，蔗糖酶活性不断增加，脲酶、过氧化氢酶活性先降低后增加，碱性磷酸酶活性略有所不同；在20～40 cm亚土层，胡麻与小麦轮作、胡麻连作、胡麻与小麦间作模式下的土壤脲酶活性变化规律具有明显的相似性，其余3种酶活性变化规律发生改变，说明深层土壤酶活性受到外因的干扰增多。合理的作物种植模式可以明显影响作物的产量及产量构成，轮作制度有效的缓解了胡麻连作带来的连作危害，而间作处理在一定程度上打破了连作可能带来的负面效应，但是效果有限。

Using the method of location test， the effects of different cultivation patterns on the soil enzyme activities and yield variation characteristics of flax were studied. The results show that the changes of sucrase， urease and catalase activities under the pattern of flax-wheat crop rotation (T1)， flax continuous cropping (T2) and flax-wheat intercropping(T3) were obviously similar， the activity of sucrase was increased， the activities of urease and catalase decreased at first and then increased， and the activity of alkaline phosphatase was slightly different in 0～20 cm tillage layer. The changes of urease activity under the pattern of T1， T2 and T3 had obvious similarities， and the changes of the activities of the other three enzymes began to vary， indicating that the soil enzyme activity in deep soil was increased by the interference of external factors in 20～40 cm Sub-layer. The reasonable cropping patterns can significantly affect crop yield and yield composition， the crop rotation system effectively mitigated the continuous cropping hazards caused by continuous cropping of flax， while the intercropping treatment broke the negative effect possibly caused by continuous cropping to a certain extent， but the effect was limited， and the correlation between the two needs to be further studied.

S563.2

国家现代农业产业技术体系(GARS-17-SYZ-6)；甘肃省农业科学院中青年基金(2016GAAS53)。