烤烟烟叶的氮、钾含量与土壤氮、钾含量的相互关系及其平衡研究

Study on the relationship of N, K and the N-K ratio between soil and leaf of flue-cured tobacco

通过对烤烟中期中部烟叶与土壤的大田调查,研究氮、钾含量及其平衡的相互关系,结果表明:(1)烟叶含氮量与土壤全氮、土壤碱解氮含量之间呈显著正相关,当土壤含氮量过高时,烟叶含氮量与土壤含氮量(全氮或碱解氮)的规律性不明显;(2)烟叶含钾量与土壤全钾、土壤速效钾含量呈显著的正相关;(3)烟叶氮/钾比与土壤全氮/全钾比、土壤碱解氮/速效钾比和土壤全钾含量呈显著的相关性。

The relationship of N, K contents and the N/K ratio between soils and leaves of fluecured tobacco was studied under field conditions. Results showed that (1) There were positive correlation between the N contents in tobacco leaves and totalN, available N in soil, but when the N contents in soils is too excessive to present significant correlation between N contents of tobacco leaves and soils N contents. (2) K contents in tobacco leaves were significantly positive correlation with totalK contents and available K contents in soils, respectively. (3) N/K ratio in tobacco leaves was significantly positive correlation with total N/K ratio, ratio of available N to available K, total K in soils, respectively. 