土壤水分对烤烟农艺性状、产量和叶绿素的影响

Effect of Soil Moisture to Agronomical Characteristics, Yield and Chlorophyll of Flue-Cured Tobacco

在烤烟的不同生育期分别进行灌水处理,并在灌水前后分别进行叶绿素和农艺性状的测定。结果表明,团棵期土壤含水量65%～75%,旺长期、现蕾期、成熟期55%～65%,最有利于烟叶生长;土壤含水量越高,越有利于株高的增长,但对根的生长不利;水分过多、过少都不利于产量的形成;团棵期土壤含水量65%～75%,旺长和现蕾期75%～85%,成熟期35%～45%时,最有利叶绿素含量的增加,可使烟叶叶绿素含量达到最高。研究还认为,5、6月正值江西汛期,降水量远远超过烤烟生产需要,对产量和品质的形成十分不利,其间要特别注意田间水分管理,及时排水排渍。

Chlorophyll and agronomical characteristics of flour-cured tobacco were measured in different growth stag before and after water irrigation, the results show that： when the soil moisture content is 65%-75% in rosette stage and 55%-65% in fast growing stage, budded stage and mature stage, it is the best to the growth of tobacco＇s leaves. The more content of the water, the higher they grow, the worse the roots are. So over or less water content is not good to the form of yield of flour-cured tobacco, about 65%-75% water content is good to chlorophyll in rosette stage and fast growing stage, and 35%-45% water content is good to chlorophyll in budded stage and mature stage.