平欧杂种榛林下套种牧草对树体生长的影响

Effects of intercropping forage grass with hybrid hazelnut on hazel bush growth

为研究平欧杂种榛林下套种牧草对树体生长的影响,以章古台地区沙地栽培的平欧杂种榛达维、辽榛3号和辽榛7号3个品种(系)为研究对象,采用“行间生草+清耕带覆盖”的生草方式,进行了榛树行间套种豆科牧草白三叶试验。结果表明:平欧杂种榛林下套种牧草后,叶片总叶绿素和叶绿素a含量均显著高于对照,有利于平欧杂种榛对光能的吸收、传递和转换;叶片的净光合速率和水分利用效率也高于对照,提高了叶片的光合能力和水分利用效率,促进了碳素营养的积累,提高了抗干旱能力;有效降低了不抗抽条品种辽榛7号的抽条比例;树高、地径、平均冠幅和1年生枝生长量都显著高于对照。林下套种牧草明显促进了平欧杂种榛的树体生长。

To research the effects of interplanting hybrid hazelnut with forage grass on hazel bush growth,three varieties“Dawei”,“Liaozhen No.3”and“Liaozhen No.7”were chosen as object.Trifolium repens were planted between rows of hazelnuts.Results indicated that after interplanting T.repens,the contents of total chlorophyll and chlorophyll a in leaves were significantly higher than those in the control group,which was beneficial to the absorption,transmission and conversion of light energy in the hybrid hazel trees;the net photosynthetic rate and water use efficiency of leaves were also higher than that of the control,which improved the photosynthetic capacity and water use efficiency of leaves,promoted the accumulation of carbon nutrients and improved the ability to resist drought;effectively reduced the sprout rate of“Liaozhen No.7”;tree height,ground diameter,average canopy width and 1-year shoot growth were all significantly higher than that of control group.Intercropping forage grass is beneficial to the growth of hazelnut.