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人们对烤烟的要求首先是优质,其次才是丰产。近几年来烤烟种植面积扩大,产量增加很多,而质量却有所下降。本文根据省内13个重点县的烤烟生产资料及56个站的气象资料,从农业气候角度评价发展烤烟生产的有利和不利条件,对形成优质烤烟的气候因素作初步探讨,并提出烤烟的适宜种植范围,为本省提出的“稳定面积,主攻质量”调整烤烟种植计划,提供气候依据。一、栽培优质烤烟的气候条件我省烤烟主要分布在海拔800—1500米的中部、北部和西北部各县,烤烟产量占全省的90%以上。我省优质烤烟产区,除土壤适宜外,气候条件是一个重要因素。1、气候温和:烤烟是喜温作物,低于10℃和高于35℃都对生长不利。大田生长期要求日平均气温≥10℃,积温2300—2600℃,成熟期气温20—28℃,低于20℃时,则生长不良;温度高于30℃,特别是超过35℃时,干物质的消
The demand of people for flue-cured tobacco is, first and foremost, high-quality and secondly, high yield. In recent years, the planting area of flue-cured tobacco has been expanded, output has increased a lot, and the quality has declined. Based on the data of tobacco production in 13 key counties and the meteorological data of 56 stations in this province, this paper evaluates the favorable and unfavorable conditions for the development of tobacco production from the perspective of agricultural climate, and makes a preliminary discussion on the climatic factors for the formation of high quality flue-cured tobacco. Planting range, proposed for the province’s “stable area, the main quality” to adjust the planting plan of flue-cured tobacco to provide climate basis. First, the cultivation of high-quality flue-cured tobacco climate conditions Flue-cured tobacco in our province mainly in the 800-1500 meters above sea level in the central, northern and northwestern counties, tobacco production accounted for more than 90% of the province. High quality flue-cured tobacco production areas in our province, in addition to suitable soil, the climatic conditions is an important factor. 1, mild climate: flue-cured tobacco is a warm crop, less than 10 ℃ and higher than 35 ℃ are unfavorable to growth. During the field growth period, the daily average temperature is ≥10 ℃, the accumulated temperature is 2300-2600 ℃, and the mature temperature is 20-28 ℃. When the temperature is lower than 20 ℃, the growth is poor. When the temperature is higher than 30 ℃, especially over 35 ℃, the dry matter The elimination of