不同烤烟品种对根际pH适应能力的研究

土壤ｐＨ将直接影响到土壤中的养分状况和有效性，而根际ｐＨ又直接影响到烟草根系的生长和养分吸收，从而对烟草地上部的生长和烟叶产质量产生影响〔１〕。多年来，人们一直认为生产优质烟叶的最适土壤ｐＨ是５．５～６．５〔２〕。然而在我国却有不少生产优质烟叶的土壤...

Study on Adaptive Capacity to Rhizosphere pH in Different Flue-cured Tobacco Varieties

The experiment indicated that accommodation to rhizosphere pH of growth of different fluecured tobacco varieties had obvious difference. If we set a standard for fluecured tobacco's rhizosphere pH in the largest growing area, variety NC89 and S791 need soils with (pH6.57.5), NC82 and Chinese tobacco 90 preferred (pH7.58.5),K326 and Honghuadajinyuan preferred the soils with weak acid. The fittest pH of six fluecured tobacco varieties, absorption nitrogen was basically the same as that of six fluecured tobacco varieties. Additionally in this experiment, it also found that tobacco rhizosphere could adjust its rhizosphere pH to the fittest range either under weak base condition or under weak acid condition. This adjustment showed that ability to lower rhizosphere pH of base environment was rather stronger and ability to raise low rhizosphere pH of acid environment was rather weaker.