This invention discloses a method for
topping Yunyan 87 tobacco variety suitable for low-
latitude, high-altitude tobacco-growing areas. The method involves
transplanting tobacco plants between April 25th and May 5th, and then classifying and
topping the plants according to their growth status (early flowering, poor growth, average growth, good growth, and excellent growth). Specifically, for early flowering plants, the "flowering without leaf removal" method is used, lengthening the internode distance by 5 cm and leaving 16 leaves, with the
plant height controlled at 80-85 cm after
topping. For plants with poor, average, good, and excellent growth, 18, 20, 22, and 24 leaves are left respectively, with
plant heights controlled at 90-95 cm, 100-105 cm, 110-115 cm, and 120-125 cm. Experiments have shown that this method significantly improves tobacco yield and
economic benefits, with a substantial increase in per-acre output value and the proportion of high-quality tobacco, superior to traditional topping methods. This method effectively solves the problems of unreasonable
plant population structure and low tobacco yield and quality in low-
latitude, high-altitude tobacco-growing areas.