5 种外源活性物质促进烤烟增产提质的机制研究.

【Objective】The present paper aimed to screen out the most applicable and effective exogenous active substances of the tobacco root regulation. 【Method】The effect of the five exogenous active substances with plots experiments were evaluated.【Result】The application of both the mixture of compound sodium Nitrophenolate and Sodium alginate, and FZB42 microbial inoculum resulted in greater plants growth in the stages of rosette and budding during tobacco period. Compared with CK, the root character, agronomic traits, dry matter accumulation significantly improved( P < 0.05), and the yield increased by 20.8% and 28.1%, respectively. Correlation analysis showed that the total root length was significantly positively related to the tobacco leaf dry matter communication in both rosette(R2= 0.90, P < 0.01) and budding( R2= 0.94, P < 0.01) periods. 【Conclusion】The root regulation measures stimulated the highest root length throughout the tobacco growing period, which resulted in a significantly higher yield. FZB42 microbial inoculum could be used as a preferred root regulation measures in Yuxi tobacco-growing areas. [ABSTRACT FROM AUTHOR]