This study was conducted through orthogonal regression of field experiment by taking filled flue-cured tobacco variety "Longjiang 911" as the test materials, the regression effect of model was established between Nitrogen, Phosphorus and Potassium (NPK) fertilizers and flue-cured tobacco production. The various factors and interactions were analyzed, the contribution ratios and abundance/deficiency index of soil fertility were calculated and the Northeast Flue-cured Tobacco optimal fertilization program was established. The results showed that: production increased with the increase of nitrogen; production increased and then decreased with the increase of potassium; but phosphorus effect on tobacco production was not obvious; the synergistic and antagonistic effects between nitrogen and phosphorus, nitrogen and potassium, phosphorus and potassium were shown in the lower and higher range, respectively. The optimal fertilization model for the basis of the proposed tobacco fertilizer was: pure N 40.08 - 52.49 kg/hm2, P2O536.19 - 62.19 kg/hm2, K2O 70.73 -114.41 kg/hm2.%以填充型烤烟品种“龙江911”为试验材料,通过正交回归田间试验,建立了N、P、K肥与烤烟产量的回归效应模型,并对各因子及交互作用进行了分析,计算了土壤丰缺指标及基础肥力贡献率,建立了东北烤烟的优化施肥方案.结果表明:施N量增加,产量提高；K肥增加,产量先上升后下降；P肥对产量的影响并不明显；N和P、N和K、P和K表现出协同促进作用,但是过高的肥量则表现出拮抗作用.通过对N、P、K肥与产量的施肥模型综合分析得出:在东北填充型烤烟生产区,建议烟田的基础施肥量,纯N为40.08～52.49 kg/hm2,P2O5为36.19～62.19 kg/hm2,K2O为70.73～114.41 kg/hm2.
展开▼
