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SpeightG-28系美国引进的烤烟良种,在清流县推广种植三年,与省内其他品种相比,具有上等烟率和上中等烟率高、抗根茎病、耐肥、容易烘烤等特点。纵观其整个栽培过程,施肥对烟叶产量、质量的影响较为突出。一、G-28生育与施肥的关系1.生育期 G-28全生育期短,要求施足基肥,及早追肥,且以速效肥为主。若追肥偏迟,生长期植株营养不良,加重早花的发生;生长后期植株落黄不均,影响烟叶质量。因此,追肥宜早宜紧,满足植株生长的生理需要。2.对温光的敏感性 G-28品种对低温较敏感,喜光照。前期生长缓慢,中期生长迅速,旺长期明显。追肥相应以前期少,中期多。如果前期施肥偏多,则因根系偏弱吸肥不及而淋失。
SpeightG-28 is a flue-cured tobacco introduced from the United States. It has been planted in Qingliu County for three years. Compared with other varieties in the province, SpeightG-28 has the characteristics of first-rate and middle-rate, anti-rhizome, . Throughout the cultivation process, fertilization on the yield and quality of tobacco is more prominent. First, the relationship between G-28 fertility and fertilization 1. Growth period G-28 full-term short, requiring full-footed fertilizer, early top dressing, and quick-acting fertilizer-based. If topdressing delay, vegetative growth in poor nutrition, increasing the occurrence of early flowering; late fall yellow plants fall, affecting the quality of tobacco. Therefore, the top dressing should be tight to meet the physiological needs of plant growth. 2. Sensitivity to temperature and light G-28 varieties are more sensitive to low temperatures, like light. Early growth slow, rapid growth in the medium term, Wang long-term obvious. Corresponding to the early stage less fertilizer, medium and more. If more pre-fertilization, due to weak roots and leaching fat leaching.