| 不同类型土壤上施用生物炭对烤烟氮钾养分积累的影响 |
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| 引用本文： | 李彩斌,张久权,何轶.不同类型土壤上施用生物炭对烤烟氮钾养分积累的影响[J].农学学报,2023,13(9):54-62. |
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| 作者姓名： | 李彩斌 张久权 何轶 |
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| 基金项目： | 贵州省烟草公司毕节市公司项目“生物炭及炭基肥的应用效果研究及安全性评价”(2018520500240059) |
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| 摘 要： | 为了探明生物炭施用量对烤烟N和K积累的影响，在贵州省毕节市何田科技园进行了盆栽试验。采用2因素（3种土壤×5种生物炭用量）全因子组合设计，完全随机排列。土壤为采自烟田0~20 cm的黄壤、黄棕壤、石灰土；生物炭用量为0%、0.1%、1%、2.5%、5%（w/w，相当于0、1.25、12.5、31.3、62.5 t/hm2大田用量）。结果表明：黄壤、石灰土、黄棕壤上施用5.0%生物炭的处理比不施生物炭的处理，烤烟每株侧根数分别增加17.0、30.7、20.3个，增加幅度分别为150.0%、137.4%、67.1%。随着生物炭用量的增加，根、茎、叶、整株氮(N)积累量增加，但达到N积累量最高点所需的生物炭施用量，各土壤间存在差异；根系和叶片钾(K)含量不断增加，最高增加量分别为47.8%和32.3%，根系增加最明显；烤烟根系、烟茎、叶片K积累量不断增加，最高分别为311.8%、87.9%、144.7%。总之，烟田土壤施用生物炭后，侧根数量显著增加，N和K的积累量显著提高。
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| 关 键 词： | 生物炭 烤烟 氮 钾 土壤类型 交互作用 |
| 收稿时间： | 2022-08-23 |
Effects of Biochar Application to Three Types of Soils on the Uptake of Nitrogen and Potassium in Flue-cured Tobacco |
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| LI Caibin,ZHANG Jiuquan,HE Yi.Effects of Biochar Application to Three Types of Soils on the Uptake of Nitrogen and Potassium in Flue-cured Tobacco[J].Journal of Agriculture,2023,13(9):54-62. |
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| Authors: | LI Caibin ZHANG Jiuquan HE Yi |
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| Abstract: | A pot experiment was conducted at Hetian S&T Research Station of Bijie in Guizhou Province, to explore the effect of biochar application rate on nitrogen (N) and potassium (K) uptake in flue-cured tobacco. A factorial design with two factors (3 types of soils × 5 biochar rates) and a completely randomized layout were used in this experiment. Soil samples of yellow soil, yellow brown soil and calcareous soil were collected from tobacco planting field (0-20 cm). The biochar application rate was 0%, 0.1%, 1%, 2.5% and 5.0% (w/w, equivalent to 0, 1.25, 12.5, 31.3, 62.5 t/hm2 of field use). The results showed that: compared with the control (no biochar application), under the biochar application rate of 5.0%, the number of lateral roots per tobacco plant in yellow soil, calcareous soil and yellow brown soil increased by 17.0, 30.7 and 20.3, respectively, 150.0%, 137.4%, and 67.1% higher than that of the control, respectively. With the increase of biochar rate, the N uptake of tobacco roots, stems, leaves and whole plant increased, but the biochar rates for the highest N uptake by tobacco plants in different types of soils were different. With the biochar rate increase, the K content of roots and leaves of tobacco increased, with the maximum increase of 47.8% and 32.3%, respectively, and the K content of roots increased most obviously. The K uptake in roots, stems and leaves of tobacco increased continuously, with the maximum increase of 311.8%, 87.9% and 144.7%, respectively. In conclusion, the application of biochar can significantly increase the number of lateral roots of tobacco plants, and raise the uptake of N and K in tobacco. |
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| Keywords: | biochar flue-cured tobacco nitrogen potassium soil type interaction |
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