| This article has been：Browse 2028Times Download 2231Times |
scan it! |
|
|
| DOI：doi：10.13522/j.cnki.ggps.20180460 |
|
| The Effect of Water-nitrogen Coupling on Growth, Yield and Quality of Flue-cured Tobacco |
|
TANG Hong, WANG Jianwei, LI Xiangyang, ZENG Zhangquan, LIU Lunpei, LIU Libo, YAN Hongguang
(1.School of Life and Health Science, Kaili University, Kaili 556011, China;
|
|
1.School of Life and Health Science, Kaili University, Kaili 556011, China; 2. Hengshan Research Station of Forest Ecosystem, Hunan Academy of Forestry, Changsha 410004, China)
|
| Abstract: |
| 【Objective】The purpose of this paper is to experimentally elucidate the response of growth, yield and quality of flue-cured tobacco to different fertigation schedules. 【Method】The experiment was conducted in field, and we compared four irrigation rates: no irrigation (W0), 0.5 L per plant (W1), 1.0 L per plant (W1) and 2.0 L per plant (W3), and two nitrogen applications: 90 kg/hm2(N1) and 120 kg/hm2(N2). In each treatment, we measured the growth, yield and leaf quality of the tobacco.【Result】Compared with W0N2, W3N2 increased plant height, maximum leaf area, leaf area, stem girth, internodal length and root volume by 13.22%, 13.77%, 14.36%, 10.91%, 10.63% and 19.95%, respectively. Compared with W3N1, W3N2 increased plant height, maximum leaf area, leaf area, stem girth, internodal length, root volume and yield by 5.39%, 7.27%, 7.43%, 7.45%, 0.74% and 23.84% and 2.06% respectively. Total sugar, reduced sugar, total nitrogen and potassium content in all grade tobacco leaf were positively correlated to irrigation amount, contrasting to alkaloid, protein and chlorine content in tobacco leaf that decreased as the irrigation amount increased. Irrigation amount and nitrogen application interactively impacted chemical components of the tobacco leaf, and all treatments improved visual and tasting quality of all grade leaf, compared to the control.【Conclusion】Irrigating 1.0~2.0 L per plant coupled with 120 kg/hm2 of nitrogen application gave the best yield and tobacco leaf quality in less fertile soils in Qiandongnan prefecture of Guizhou province. This could be disseminated to other areas to provide guidance for rational use of water and fertilizer resources and in the meantime improving tobacco quality. |
| Key words: water-nitrogen coupling; flue-cured tobacco; growth; yield; quality |
|
|
