硼对烤烟生长及烟叶、烟种产质量影响的研究

Effect of Boron on Growth,Yield and Quality of Leaves and Seeds of Flue-cured Tobacco

在中国烟草永州良种繁育基地，连续两年在烤烟田和留种田进行硼索叶面喷施试验。结果表明，喷施一定浓度的硼砂能够促进烤烟生长，烟叶的产质量也随之得到提高，产量、产值、上等烟率提高幅度分别为2．51％～4．36％，4．88％～8．46％，25．06％～31．78％。喷施硼砂后，留种团烤烟种子的产质量也得到了显著提高，产量、千粒重提高幅度分别为17．95％～22．44％，6．49％～10．39％。本试验条件下，适宜的硼砂喷施浓度为0．3％～0．4％。

Experiments of boron sprayed on leaves were conducted in flue-cured production and breeding fields in Yongzhou Base of Fine Seeds Breeding of China Tobacco in successive two years. The results showed that the growth, yield and quality of flue-cured tobacco leaves were improved by borax sprayed on leaves in a certain concentration. The range of increasing of yield, production value and superior leaf proportion were 2.51%-4.36%, 4.88%-8.46% and 25.06% -31.78%, respectively. Yield and quality of flue-cure tobacco seeds were improved significantly by boron sprayed on leaves, and the range of increasing of yield and thousand seed weight were 17. 95%-22.44% and 6.49%-10. 39% respectively. Under conditions in this study, the optimum concentration of borax was 0. 3%-0. 4%.