豫中烟区土壤速效钾与土壤因素及烟叶品质性状的关系分析

摘要

Through field trials and laboratory analysis , this paper studied the relationships of soil available potassium content with soil factors and quality traits of tobacco in middle Henan province .The results showed that the available potassium content in the soil of middle Henan province was relatively low , and ranged from 46.46 mg/kg to 248.00 mg/kg with the mean of 111.63 mg/kg and the variation coefficient of 37.43%.As for different tobacco-growing areas , Pingdingshan had higher soil available potassi-um content (120.05 mg/kg), followed by Luohe and Xuchang in order .The soil available potassium content gradually increased with the rising of terrain, and it was the highest (133.57 mg/kg) in low-mountain area.The soil available potassium content was very significantly correlated with the organic matter content (0.370**), available nitrogen content (0.242**), available phos-phorus content (0.297**) and cation exchange capacity (0.351**) in the soil, and was significantly correlated with soil particle size 0.10~0.05 mm (-0.188*) and soil particle size below 0.001 mm (0.193*).The established regressive equations descri-bing the relationships between soil available potassium content and tobacco leaf potassium content , as well as between soil available potassium content and tobacco leaf neutral aroma substance content all reached a highly significant level .%采用田间试验与室内分析相结合的方法，分析了豫中烟区土壤速效钾含量对土壤因素及烟叶品质性状的影响。结果表明：豫中烟区土壤速效钾含量平均值为111．63 mg／kg，含量较低，变幅为46．46～248 mg／kg，变异系数较大（37．43％）；对于不同植烟地区而言，平顶山土壤速效钾（120．05 mg／kg）含量较高，漯河次之，许昌较低；随着地势的升高，土壤速效钾含量逐渐升高，土壤速效钾含量以低山地区含量（133．57 mg／kg）最高；土壤速效钾含量与有机质（0．370倡倡）、有效氮（0．242倡倡）、速效磷（0．297倡倡）、阳离子交换量（0．351倡倡）呈极显著相关；与土壤粒径0．1～0．05 mm（－0．188倡）和＜0．001 mm（0．193倡）呈显著相关；土壤速效钾含量与烟叶钾含量、致香物质含量分别建立的回归方程均达到极显著水平。