【摘要】 [目的]防治烟草根结线虫病害，减少农药投入，探究改善烟株营养状况和提高抗病能力的措施，推动烟草栽培可持续发展。[方法]采用单因素试验设计，4个处理分别为清水对照、腐殖酸(H)、H+植物源杀线剂、H+微量元素，测定了烤烟生物量、主要农艺指标、根结线虫病级与根结指数、根系和根结形态学参数。[结果]与清水对照相比，所有处理均显著降低了烤烟根结线虫病级和根结指数、根结干重、根结数量和根结体积，显著提高了烟株茎粗、叶面积、SPAD、叶片数和株高，促进了根系生长，进而显著提高了烤烟叶干重和茎干重。[结论]增施腐殖酸营养液及其与植物源杀线剂和微量元素配施，可促进根系生长，进而提高烤烟抗病和抑病能力，是一项具有推广价值的措施，但对其抗病和抑病的机理，还有待进一步研究。更多还原

【Abstract】 [Objective]To control tobacco root knot nematode disease, reduce pesticide investment, explore how to control root knot nematodes by improving the nutritional status and disease resistance of tobacco plants to promote sustainable development of tobacco culture. [Method] A field experiment was carried out with one factor randomized design. The four treatments were respectively water control, humus acid(H), H + phytogenic nematicide and H + trace elements. The biomass of flue-cured tobacco, main agronomic indexes, disease level and root-knot index of nematodes, and morphological parameters of root and root-knot were measured. [Result] Compared with the control of clear water, all three treatments significantly reduced the disease grade and root-knot index, dry weight, number and volume of root-knot, while significantly increased the dry weight of leaf and stem due to the improvement of root growth, stem diameter, leaf area, SPAD, leaf number and plant height. [Conclusion] Therefore, our results highlighted that application of humus acid and its combination of phytogenic nematicide and trace element is a useful measure for sustainable tobacco production in the practice which can enhance the ability of flue-cured tobacco against disease resistance and inhibition of tobacco root nematode. However, the mechanism of its disease resistance and inhibition remain to be further studied.更多还原