水培条件下烤烟间作草木樨对烟株氮磷钾含量的影响*

 通过水培试验，研究了烤烟单作、烤烟间作黄花草木樨的农业生物多样性种植措施对烤烟氮、磷、钾养分含量的影响。结果表明，与烤烟单作相比，烤烟与黄花草木樨间作使得烟叶的含氮量、含磷量和含钾量分别提高了0.28%～0.52%，0.01%～0.16%和1.1%～2.77%。黄花草木樨吸收了水体中的过多残留营养元素，使得水中的营养元素更趋于平衡。间作增加了水层中植株的根系，营养元素有效性得以提高，相对含量增加，烟株养分得以改善。

Effects of Flue-Cured Tobacco and Sweet Clover Intercropping on Leaf Nutrient Contents

The water culture was conducted to investigate the effects of flue-cured tobacco and sweet clover intercropping on nutrients content of tobacco leaves.The results were as follows: compared with tobacco monocropping, intercropping increased the nitrogen, phosphorus and potassium contents of tobacco leaves by 0.28%～0.52%, 0.01%～0.16% and 1.1%～2.77%, respectively.Sweet clover absorbed residual nutrients in water, and made the nutrients in water more balanced and reasonable.Intercropping increased the plant roots in water, raised the validity of the mineral nutrient around the roots and increased the relative nutritious element contents in water.The nutrients of plant were improved.