不同施镁量对烤烟K326生长和产质量的影响

[目的]探索姚安县优质烟叶生产最佳镁肥施用量。[方法]研究镁的不同施用量对烤烟生长发育及产质量的影响。试验设置镁肥4个不同施用量:不施镁肥(T_1)和施用150 kg/hm~2(T2)、300 kg/hm~2(T3)、450 kg/hm~2(T_4),并对各处理烤烟生长发育及农艺性状进行比较分析。[结果]与不施镁肥处理相比,随施镁量的增加,株高、叶长、叶宽和茎围随之增加;在0~450 kg/hm~2施镁范围内,施镁对烤烟具有显著的增产、增值的效应,其中烤烟的产量和产值均以450 kg/hm~2处理最高,其与T_1、T_2、T_3处理间的差异达到极显著水平;烟叶化学成分含量以450 kg/hm~2处理最接近优质烟叶的含量范围且其各成分协调性也最好。[结论]烤烟生产过程中,可施用适量的镁肥,以提高烤烟的产质量。

Effects of Magnesium on Growth and Yield and Quality of Flue-cured Tobacco K326

[Objective]To explore optimum dosage of magnesium fertilizer for quality tobacco production in Yaoan County. [Method]The experi-ment was studied on the influence of tobacco growth and the quality in different concentrations of magnesium fertilizer. This test set four treatments of magnesium fertilizer dosage:0 kg/hm2 ( T1 ) ,150 kg/hm2 ( T2 ) ,300 kg/hm2 ( T3 ) ,450 kg/hm2 ( T4 ) ,growth and agronomic traits of flue-cured tobacco was analyzed. [Result]Compared with control,the plant height,leaf length,leaf width and stem girth increased with magnesium fertilizer dosage increasing. In the dosage range of 0 kg/hm2 to 450 kg/hm2 ,the magnesium fertilizer treatment can significantly increase production and output value of flue-cured tobacco. Production and output value of flue-cured tobacco were of the highest at the 450 kg/hm2 of treatment ,the differences among 450 kg/hm2 of treatment and T1 ,T2 and T3 was extremely significant. The content of chemical components of tobacco leaf which applying 450 kg/hm2 magnesium fertilizer was mostly closed to the range of quality tobacco leaf,and it had the best coordination of components. [Conclusion]In the processing of planting flue-cured tobacco,applying situation magnesium fertilizer can improve yield and quality.