摘要
用四川典型的植烟土壤研究了钾肥种类与用量对烤烟产量和品质的影响。结果表明，在速效钾水平较低的中性紫色土上，施钾效果明显，最佳施量为Ｋ＿２Ｏ１８０ｋｇ／ｈｍ￣２，养分配比为Ｎ：Ｐ＿２Ｏ＿５：Ｋ＿２Ｏ＝１：１：１．５。而在速效钾水平较高的钙质紫色土上，烤烟的最佳施钾量为Ｋ＿２Ｏｌ２０ｋｇ／ｈｍ￣２，养分配比为Ｎ：Ｐ＿２Ｏ＿５：Ｋ＿２Ｏ＝１：１：１，并可以氯化钾部分代替硫酸钾为烤烟提供钾素。当烟叶钾氯比等于４时，氯化钾代替硫酸钾的百分比（占最佳施Ｋ＿２Ｏ量），在中性紫色土上为５６．５％，钙质紫色土上为９６．９％，可使烟叶含氯量达到０．４％～０．６％的理想范围，而对烟叶的产量及品质无显著负的影响，从而取得较好的经济效益。
Experiments were conducted to study the effects of different amounts of K2SO4and KCl on the
yield and quality of flue-cured tobacco.The results indicated that in theneutral purple soil,while
the potassium content is low,the effect of applying K2O on flue-cured tobacco was
significant.The best amount of K2O was l80 kg/hm2 and the optimumcombination was
expressed as N:p2O5:K2O=1:1:1.5.In the calcareous purple soil,while the potassium content is
high,the effect of applying K2O on flue-cured tobacco wasvery little,The better amount of K2O
was l20 kg/hm2 and the optimum combination wasexpressed as N:P2O5:K2O=1:1:l.Then KCl
could partly replace K2SO4,the yieldand output value of tobacco leaf would be increased When
the ratio of Cl and K2O was 4,the best percentage of KCl replaced for K2O was 56.5%in the
neutral purple soil and 96.88%in the calcareous soil.
出处
《西南农业大学学报（自然科学版）》
CSCD
1996年第2期174-178,共5页
Journal of Southwest Agricultural University
关键词
烟草
钾肥
产量
品质
烤烟
tobacco
potassium
fertilizrs
tobacco-yield
quality factor
