| 水磷耦合烤烟养分吸收分配规律研究 |
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| 引用本文： | 汤宏,曾掌权,李向阳,王建伟,邓洁,刘伦沛,严红光.水磷耦合烤烟养分吸收分配规律研究[J].水土保持学报,2019,33(2):294-302,316. |
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| 作者姓名： | 汤宏 曾掌权 李向阳 王建伟 邓洁 刘伦沛 严红光 |
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| 作者单位： | 1. 凯里学院大健康学院, 贵州 凯里 556011;2. 湖南衡山森林生态系统定位观测研究站湖南省林业科学院, 长沙 410004 |
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| 基金项目： | 贵州省科学技术基金项目（黔科合LH字[2014]7220）；贵州省教育厅特色重点实验室项目（黔教合KY字[2017]011） |
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| 摘 要： | 为探究烤烟适宜的水磷耦合模式及其对氮、磷、钾养分吸收积累的影响。采用田间小区试验,试验设置3种灌水水平和施磷水平,分别为低水(W_1:0.50 L/株)、中水(W_2:1.00 L/株)、高水(W_3:2.00 L/株)和低磷(P_1:32 kg/hm^2)、中磷(P_2:64 kg/hm^2)、高磷(P_3:96 kg/hm^2),研究了不同施磷量和灌水量条件下烤烟对氮磷钾养分吸收积累的影响。结果表明:施磷量相同时,灌水处理能够明显增加烟株对氮、磷、钾养分的吸收积累量,表现为:W_3P_i>W_2P_i>W_1P_i>CK_i(其中i=1或2或3);当灌水量相同时,增加施磷量也有利于烟株对氮磷钾养分的吸收积累,且在施磷水平为96 kg/hm^2时表现较好,表现为:W_iP_3>W_iP_2>W_iP_1;高磷水平下,灌水量为1.00,2.00 L/株时,W_3P_3和W_2P_3处理烟株对氮磷钾养分的吸收积累量差异不显著;烟株和根、茎、叶各器官对钾的吸收量高于氮和磷,氮、磷、钾在根、茎、叶器官中的分配顺序呈现叶>茎>根的变化规律;在烟株的不同生育期,对养分的吸收积累量和积累强度存在差异。烟株对养分的吸收积累主要在旺长期,烟叶是养分的主要吸收积累器官;施磷量为96 kg/hm^2,灌水量为1.00～2.00 L/株的水磷耦合处理在促进烟株对氮磷钾养分的吸收积累方面效果较好。烤烟施肥中要注意调整氮磷钾的施用比例和水磷耦合配比。
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| 关 键 词： | 水磷耦合 烤烟 养分 吸收 分配 |
| 收稿时间： | 2018/11/8 0:00:00 |
Studieson on Nutrients Uptake and Distribution of Flue-Cured Tobacco with Water-Phosphorus Coupling |
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| TANG Hong,ZENG Zhangquan,LI Xiangyang,WANG Jianwei,DENG Jie,LIU Lunpei,YAN Hongguang.Studieson on Nutrients Uptake and Distribution of Flue-Cured Tobacco with Water-Phosphorus Coupling[J].Journal of Soil and Water Conservation,2019,33(2):294-302,316. |
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| Authors: | TANG Hong ZENG Zhangquan LI Xiangyang WANG Jianwei DENG Jie LIU Lunpei YAN Hongguang |
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| Institution: | 1. School of Life and Health Science, Kaili University, Kaili, Guizhou 556011;2. Hengshan Research Station of Forest Ecosystem, Hunan Academy of Forestry, Changsha 410004 |
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| Abstract: | In this study, the optimal pattern for water-phosphorus coupling and its influences on Nitrogen (N), Phosphorus (P) and Potassium (K) uptake and accumulation of flue-cured tobacco were studied, which provided scientific basis for the rational use of water-fertilizer resources in Qiandongnan prefecture tobacco land, Guizhou province. Three irrigation rates:0.50 L/plant (W1), 1.00 L/plant (W2) and 2.00 L/plant (W3), and three P fertilizer application rates:32 kg/hm2 (P1), 64 kg/hm2 (P2) and 96 kg/hm2 (P3) were set in this field plot experiment. The results showed that, at the same P application rate, N, P and K uptake and accumulation of tobacco plant were significantly increased by irrigation. The order of N, P and K uptake and accumulation of each treatment was as follows:W3Pi > W2Pi > W1Pi > CKi (i=1 or 2 or 3). At the same water irrigation level, N, P and K uptake and accumulation of tobacco plant increased as P application rates increased. The P application rate of 96 kg/hm2 was beneficial for N, P and K uptake and accumulation. The order of N, P and K uptake and accumulation was as follows:WiP3 > WiP2 > WiP1. Under high P application treatment, irrigation rate of 1.00~2.00 L/plant, N, P and K uptake and accumulation were not significantly different between W3P3 and W2P3 treatment. The K uptake and accumulation of tobacco plant, leaf, stem and root were higher than N and P. The order of N, P and K distributed in root, stem and leaf was as follows:leaf > sti > root. The N, P and K uptake, accumulation and accumulation intensities of tobacco plant were different at different growth stages. Nutrients uptake and accumulation of tobacco plant occurred mainly at tobacco leaf and vigorous growth stages. The P application rate of 96 kg/hm2 and irrigation rate of 1.00~2.00 L/plant were suitable for N, P and K uptake and accumulation of tobacco plant. The optimal application rates of N, P and K fertilizers and water and phosphorus coupling should be paid attention to adjust in fertilizer application of tobacco. |
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| Keywords: | water-phosphorus coupling flue-cured tobacco nutrients uptake distribution |
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