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- Title
Effects of phosphorus fertilizer on the root system and its relationship with the aboveground part of flue-cured tobacco.
- Authors
WANG Yan-li; LIU Guo-shun; DING Song-shuang; WANG Jing; LI Yuan-bo; DONG Xiao-li
- Abstract
Using `Yuyan 10' as the material, the effects of different phosphorus fertilizer applica- tion on root characteristics of tobacco, such as root dry mass and the difference of dry matter distri- bution and mineral nutrient accumulation between its above and underground parts were investiga- ted. The results showed that the growth of flue-cured tobacco root system and the distribution of dry matter to the aboveground part were significantly promoted by phosphorus fertilizer application. The application of 30 kg P2O5·hm-2 led to the maximums of root dry mass, root volume, root activity and the minimum of root to shoot ratio. The maximum nutrient accumulation rates of root and leaf appeared 57-66 days after transplanting and 44-55 days after transplanting, respectively. Phos- phorus could not only promote the mineral nutrition absorption of tobacco and the earlier appearance of maximum nutrient accumulation, but significantly promote the nutrient accumulation of the aboveground part. But, the positive effects described above would be weakened when the amount of phosphorus fertilizer was more than 30 kg P2O5 ·hm-2. Therefore, it' s necessary to control the amount of phosphorus application to improve the quality of tobacco leaves.
- Publication
Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao, 2015, Vol 26, Issue 5, p1440
- ISSN
1001-9332
- Publication type
Article