关键词: 高硼土壤, 烤烟, 钾, 离子吸收

Abstract: In order to investigate the alleviation effect of potassium fertilizer on high boron toxicity, this paper took K326, a flue-cured tobacco cultivar as material, and conducted a field experiment to investigate the effect of different amounts of potassium on the dry matter, economic benefit and content of boron(B), nitrogen(N), phosphorus(P) and potassium(K) of flue-cured tobacco in high-boron soil. The results showed that high-boron soil significantly increased B content in different parts of tobacco plant, and significantly reduced total N, total P, total K content, dry matter and economic benefit. Potassium significantly increased tobaocco’s dry matter and economic benefit, inhibited the uptake of B and promoted the uptake of N, P, K under high-boron soil. Meanwhile, there was a certain correlation between B, N, P and K in the tobacco plant. K and B had a significant negative correlation and significant positive correlation between N, P and K. Under the experimental conditions, the optimum potassium application rates was 420 kg/hm2 in high-boron soil.

Key words: high-boron soil, flue-cured tobacco, potassium, ion uptake