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【目的】研究杏麦间作模式下杏树根系对小麦根系分布及产量的影响。【方法】在杏麦间作模式下,采用隔断杏树根系的方法,研究杏树根系对小麦根系(长度、表面积、干重)分布、根冠比和产量的影响。【结果】水平方向上,扬花期和灌浆期小麦根长密度、根表面积密度和根质量密度,均表现为距杏树距离的增大而增加。垂直方向上,隔根处理扬花期和灌浆期三个冠区小麦根长密度、根表面积密度和根质量密度在0~20 cm土层显著低于不隔根处理;扬花期近冠区和远冠区20~40 cm,根长密度和根表面积密度隔根处理低于不隔根处理,冠下区高于不隔根处理;灌浆期三个冠区20~100 cm土层,小麦根长密度、根表面积密度和根质量密度隔根处理显著高于不隔根处理。隔根处理0~40 cm根系占总根系88.7%~91.4%,不隔根处理占95.7%~97.1%。隔根处理小麦根冠比低于不隔根处理,产量高于不隔根处理,冠下区达到显著差异。【结论】杏麦间作模式下杏树根系影响了小麦根系的生长和分布,从而对根冠间的物质分配和产量产生影响,尤其是对冠下区影响较大。间作小麦(不隔根处理)根系分布较隔根处理在土层中分布更浅。
【Objective】 The objective of this study was to investigate the effect of apricot root system on root distribution and yield of wheat under apricot intercropping. 【Method】 Under the apricot intercropping system, the effect of apricot root system on root distribution (length, surface area, dry weight), root / shoot ratio and yield of wheat was studied by cutting the root system of apricot tree. 【Result】 The results showed that in the horizontal direction, the root length density, root surface area density and root mass density at flowering and grain filling stage both increased with the increase of distance from apricot. In the vertical direction, root length density, root surface density and root mass density in three crown regions at flowering and filling stages were significantly lower than those without root separation at the flowering and filling stages; The root length density and root surface area density in the crown area were lower than those in the non-root separation treatment and those in the crown area were higher than those in the non-isolation treatment. The root length Roots density, root surface area density and root mass density were significantly higher than those without root separation. The 0-40 cm root system of root isolation accounted for 88.7% ~ 91.4% of the total root system, 95.7% ~ 97.1% of the total root system. The root-shoot ratio of wheat under rooting was lower than that without rooting, the yield was higher than that without rooting and the crown area reached a significant difference. 【Conclusion】 The apricot root system in the apricot intercropping system affected the growth and distribution of wheat root system, which affected the material distribution and yield of the root and canopy, especially the crown area. The root distribution of intercropping wheat (non-rooting treatment) was more shallowly distributed in soil than that of rooting.