叶面硼肥对苦荞生长及产量的影响

为了明确硼肥对苦荞根系、植株生长及产量的影响,以低产苦荞品种‘六苦2081’为试验材料,采用叶面喷施的方法研究了硼肥对苦荞根际土壤营养、根系形态、地上部生长及产量的影响,同时对苦荞地上部、地下部的相关性进行了分析。结果表明:硼肥的施用能显著降低根际土壤中铵态氮和有机质的含量,显著增加速效磷、速效钾的含量以及根系总长度、根系表面积、体积和根系的平均直径。硼肥的施用能显著增加苦荞的产量,当硼肥质量浓度为24mg·L-1时,苦荞产量达最大,接近对照的2倍。相关性研究表明,‘苦荞2081’的根系长度与表面积和体积呈极显著的正相关关系,根系表面积和体积呈极显著的正相关关系,主茎节数和主茎分枝数间呈极显著的正相关关系。

Effect of Spraying Leaves with Boron Fertilizer on Growth and Yield of Tartary Buckwheat

Effects of spraying leaves with a boron fertilizer solution of varied concentrations on the growth of roots and plant as well as the productivity of a low-yield Liuku 2081 tartary buckwheat were studied.With the spraying,the contents of ammonium nutrients and organic matters in the rhizosphere soil significantly decreased,while those of available phosphorus and potassium as well as the total length,surface area,volume and mean diameter of the roots and the plant yield increased significantly.At the applied boron concentration of 24 mg · L-1,the tartary buckwheat yield peaked to nearly double that of control.Significant correlations were observed between the length and the surface area and volume of the roots,between the surface area and the volume of the roots,and between the counts of the main stems and the branches on the plant.