腐殖酸钾对豫西地区烤烟品质及土壤环境的影响

旨在通过改变腐殖酸钾的施用量,探究腐殖酸钾对豫西烤烟品质及土壤品质的影响。试验采用大田试验的方法,对烤烟不同时期的发育情况、烤后烟化学品质及土壤理化性质进行取样调查。试验结果表明:腐殖酸钾可以在一定程度上使土壤pH值降低;增加土壤中有机质含量7.56%~26.95%;土壤中的速效钾含量提高了0%~12.88%,土壤根际微环境也得到改善。在一定腐殖酸钾施入量的作用下,烤烟烟叶内的常规化学成分得到改善,烤后烟叶的还原糖、钾、总糖等常规化学成分比对照都有所提高。烤后烟的中性致香成分在一定的腐殖酸钾施用量的作用下,其大部分含量都有明显增加。腐殖酸钾可以明显提高烤烟的上等烟比例、产量、产值、均价和单叶重,腐殖酸钾最适用量为375 kg/hm~2。

Effects of Potassium Humate on Flue-cured Tobacco Quality and Soil Environment in Western Henan

Effects of potassium humate on the quality of flue-cured tobacco and soil environment in western Henan were studied by field experiments, tobacco of different growth periods, chemical quality after fluecuring and soil physical and chemical properties were analyzed. The results showed that the soil pH value reduced to a certain degree; the content of soil organic matter increased by 7.56%-26.95%; the content of available K in soil increased by 0%-12.88%, the rhizosphere environment was improved. Under a certain amount of potassium humate application, the conventional chemical components of flue-cured tobacco leaves were improved, and the contents of reducing sugar, potassium, total sugar were higher than that of CK. Under the certain application amount of potassium humate, the contents of neutral aroma components increased significantly. Potassium humate increased the first-class tobacco ratio, yield, output value, average price and single leaf weight, and the optimum amount of potassium humate was 375 kg/hm2.