摘要:
通过田间试验,研究不同施硼量对烤烟经济性状和品质的影响.结果表明:不同施硼量对烤烟经济性状和品质均有显著影响.在0～60 kg/hm2的施硼量范围内,施硼对烤烟具有显著的增产、提高中上等烟比例及均价、增加产值的效应.烤烟产量和产值均以B4处理(施硼30.00 kg/hm2)为最高,其与CK及B1、B2、B3和B5处理问的差异达到显著水平;均价、上等比和上中等比以B3处理(施硼15.00 kg/hm2)为最高,其与CK间的差异达到极显著水平;烟叶化学成分含量以B3处理(施硼15 kg/hm2)最接近优质烟叶所要的含量范围且其各成分协调性也最好.因此,从烤烟产值和品质两方面综合考虑,重庆市武隆县优质烤烟合理的施硼量为15～30 kg/hm2.
Abstract:
A field experiment was carried out to study the effects of different rates of boron fertilizer (borax) on the yield and quality of flue-cured tobacco in Wulong county, Chongqing, China. Six treatments, CK (0 kg/hm2), B1(3.75 kg/hm2), B32 (7.50 kg/hm2), B3 (15 kg/hm2), B34 (30kg/hm2) and B5 (60 kg/hm2), were established to examine the effect on the economic characters and quality of tobacco leaves. The chemical component contents of to-bacco leaves and the compatibility between them were analyzed. The results showed that Treatment B34, whose bo-ron (B) rate was 30 kg/hm2 gave the highest yield and output value, and the differences between B4 and CK, B1,B2, B3 and B5 were statistically significant. Treatment B3 (15 kg/hm2) resulted in the highest average price and top-grade and mid-grade tobacco leaf rate, which differed from those of CK at a significant level. The chemical com-ponent contents of tobacco leaves of Treatment B3 was close to the requirements for high-quality tobacco, and the compatibility among different chemical components was the best of all the treatments. Hence, it can be concluded that economic characters and quality of tobacco leaves are influenced significantly by boron application. The yield,output value, rate of mid-grade leaves and average price were significantly improved as B rate increased from 0 to 60 kg/hm2. In terms of output value and quality, the optimum B rate should be 15～30 kg/hm2 for high-quality flue-cured tobacco growth in Wulong county, Chongqing, China.
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