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| DOI：10.13522/j.cnki.ggps.20190069 |
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| Effects of Fertigation Method and Fertilizer Amount on the Growth, N, P, K Utilization, and Yield of Flue-cured Tobacco |
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XUE Rujun, GAO Tian, MA Erdeng, JIN Yan, ZHAO Zhengxiong
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1.College of Tobacco Science, Yunnan Agricultural University, Kunming 650201, China;2.Yunnan Academy of Tobacco Agricultural Sciences, Kunming 650031, China
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| Abstract: |
| 【Objective】Find suitable fertigation method and fertilizer amount in the tobacco production.【Method】A field experiment was carried out to study the effects of two fertigation methods (drip fertigation and pour fertigation) and two N application amount (100% of recommended dose of N and 80% of recommended dose of N) on the growth, N, P, K utilization, and yield of flue-cured tobacco in 2017. 【Result】There was no significant effect of fertigation method on the N accumulation and N uptake efficiency (P＞0.05), the influence of fertigation method on the P accumulation and P uptake efficiency, K accumulation and K uptake efficiency were significant (P＜0.05) and very significant (P＜0.01), respectively. The effects of fertigation method on the maximum leaf width and leaf area at the vigorous stage of tobacco and on the tobacco yield and production value were very significant (P＜0.01) and significant (P＜0.05), respectively. The P accumulation and P uptake efficiency increased by 21.1%~21.2% and 20.9%~43.0%, K accumulation and K uptake efficiency decreased by 15.1%~19.6% and 47.5%~49.1%, respectively, the maximum leaf width and leaf area decreased by 17.4%~22.4% and 22.1%~24.4%, respectively, tobacco yield and production value decreased by 12.7%~16.2% and 7.7%~20.2%, respectively, in the treatment of pour fertigation, compared with that of the treatment of drip fertigation. The effect of N application amount on the N accumulation was significant (P＜0.05)，while the influence of N application amount on the accumulation of P, K, the agronomic traits, yield and production value of tobacco were not significant (P＞0.05).【Conclusion】The absorption of P was promoted, while the N and K accumulationwas restrained, in the pour fertigation treatment, compared with that of drip fertigation treatment. The absorption and utilization of N, P and K was promoted in the treatment of drip fertigation with N decrease, which was beneficial to the formation of tobacco production and quality, and also good for nutrient saving in the tobacco production. In short, drip fertigation with N decrease was a much reasonable fertigation method for the drought resisting production in the experiment area. |
| Key words: drip fertigation; N, P, K; agronomic traits; yield |
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