酸性土施用肽肥对烤烟烟叶养分含量的影响

Effects of Applying Peptide Fertilizer in Acidic Soil on Nutrients Content of Flue-Cured Tobacco Leaves

认识肽肥对烤烟烟叶养分含量的影响,为肽肥在酸性烟区土壤中的应用提供依据,利用烤烟田间试验设置了CK (基施烟草专用肥)、T1 (基施肽肥900 kg/ha),T2 (基施肽肥1500 kg/ha),TH (基施肽肥加磷钾肥)和TF (基施烟草专用肥加追施肽肥) 5个处理,测定了烤烟不同生长期烟叶的氮、磷、钾、钙的含量。结果表明,土壤施用肽肥显著影响烤烟烟叶养分含量。同对照相比,TH处理增加了成熟期烟叶氮、磷、钾和钙的含量3.2%、43.6%、12.4%和20.4%,T2处理增加钙26.7%,但降低钾21.6%。施用肽肥的烟叶氮和钾含量均与生长时间呈显著的负指数和二次函数相关,钙含量与生长时间呈显著的二次函数相关。成熟期烟叶氮、钾、钙含量均显著低于打顶期。由此可见,TH处理有利于增加烤烟烟叶养分尤其是钾、钙含量,有利于改善烟叶品质;肽肥与磷钾肥配合施用在酸性烟区土壤中具有应用前景;烤烟打顶可调控烟叶养分含量。

Understanding the effects of soil application of peptide fertilizer on the nutrient content of flue-cured tobacco leaves was to provide evidence for applying peptide fertilizer in the area of acidic soil. Five treatments were designed CK (base dressing tobacco specialty fertilizer), T1 (base dressing peptide fertilizer at 900 kg/ha), T2 (base dressing peptide fertilizer at 1500 kg/ha), TH (base dressing peptide fertilizer and phosphorus-potassium fertilizer) and TF (base dressing tobacco specialty fertilizer and topdressing peptide fertilizer) in a field experiment of cultivating flue-cured tobacco, and the contents of N, P, K and Ca in tobacco leaves were determined at a different stage of flue-cured tobacco. The results showed that soil application peptide fertilizer had significant effects on the nutrient content of flue-cured tobacco leaves. Compared to CK, TH increased 3.2%, 43.6%, 12.4% and 20.4% of N, P, K and Ca content in flue-cured tobacco leaves at the maturating stage, respectively, and T2 increased 26.7% of Ca content but decreased 21.6% of K content in flue-cured tobacco leaves. The content of N and K in flue-cured tobacco leaves under applying peptide fertilizer was significantly negative exponentially correlated and significantly quadratically correlated to the growing days and the content of Ca in flue-cured tobacco leaves was significant quadratically correlated to the growing days. The content of N, K and Ca in flue-cured tobacco leaves at the maturating stage was significantly lower than that of at toping stage. In summary, TH can improve the quality of flue-cured tobacco leaves by increasing the nutrient content, especially the K and Ca content at the maturating stage. The cooperation of peptide fertilizers with P and K fertilizer would have application prospects in the area of acidic soil planting flue-cured tobacco. The nutrient contents in flue-cured tobacco can be regulated by taping.