湖北保康不同海拔高度生态因素对烟叶品质的影响

Effects of ecological conditions of different altitudes on quality of flue-cured tobacco in Hubei Baokang tobacco-growing regions

在湖北保康烟区不同海拔高度选取烟叶和土壤样品,分析了该区生态因素和烟叶质量特点.结果表明,保康烟区具备生产优质烟叶的基本条件,随海拔升高,年平均气温降低,无霜期及≥10℃活动积温减少,降水量和年日照时数增加;土壤具有较强的保肥能力,pH值适宜,有机质、碱解氮含量较高,速效磷、速效钾含量偏低,大部分中微量元素含量适宜,但水溶性氯、有效硼含量较低.种植过程中应及时控氮提钾,补充硼肥,高海拔地区应考虑加施氯肥.

Tobacco and soil samples were collected from different altitudes of main tobacco-growing regions in Baokang , and the ecological factors and the quality of flue-cured tobacco leaves were analyzed. The results indicated that Baokang tobacco-growing regions had basic conditions for high quality tobacco produc- tion. With altitude going up, annual average temperature, frost-free period and ≥ 10℃ active accumulated temperature decreased, and annual precipitation and sunshine duration increased. Soil in different altitudes had higher nutrients holding ability with suitable pH, higher contents of organic matter and alkaline hydrolytic nitrogen, lower contents of available phosphorus and potassium, suitable contents of mid-microelements, but contents of chlorine and available boron were lower. It suggests that controlling N, increasing B and K, supplying Cl^- in high altitude localities.