Effects of regulation of C/N ratio wheat straw application on nitrogen, phosphorus and potassium uptake in tobacco | 小麦秸秆碳氧比调控施用对烟叶氮磷钾吸收的影响
2010
Duan Zongyan, Yunnan Academy of Agricultural Sciences, Kunming (China), Institute of Agricultural Resources and Environment | Wang Ruibao, Qujing Tobacco Company, Qujing (China), Tobacco Technology Research Center | Lu Yao, Yunnan Academy of Agricultural Sciences, Kunming (China), Institute of Agricultural Resources and Environment
[Objective] The aim was to study the effects of regulation C/N ratio wheat straw application on tobacco nitrogen, phosphorus, and potassium uptake. [Method] Effects of regulation C/N ratio wheat straw application on the flue-cured tobacco yield, output value, nitrogen, phosphorus and potassium content and cumulative uptake of the upper, middle and bottom leaf were studied by using the field plot experiments at Banqiao town, Qujing city, Yunnan Province during the 2008C2009 summer growing seasons. [Result] The results showed that the application of wheat straw alone or after C/N regulation, could significantly increase tobacco production, potassium content, the potassium and nitrogen accumulation amount of leaf, and was more conducive to the potassium uptake of tobacco leaf with wheat straw application after C/N regulation. Compared with non-straw application, the yield of tobacco increased by 6.59%, 3.58%, 5.98%, 8.80% with application of wheat straw alone, wheat straw and vetch, wheat straw and oilseed cake, wheat straw and urea nitrogen, the potassium content in tobacco leaf increased by 3.85%, 7.76%, 8.82%, 11.21%, respectively, the total potassium cumulative amount of leaf increased by 10.71%, 11.62%, 15.32%, 21.01% and the total nitrogen cumulative amount increased by 9.76%, 1.22%, 8.14%, 14.00%. However, the differences of tobacco leaf nitrogen content between the different treatments were not significant, the phosphorus uptake of tobacco leaf decreased. [Conclusion] The application of high C/N ratio wheat straw in flue-cured tobacco production, which should be concerned not only to adjust C/N ratio by adding nitrogen, but also considering additional phosphorus application.
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