Study of Matching Technology of Flue-cured Tobacco Film-under Transplanting

[Objective]The aim was to optimize and utilize climate resources of flue-cured tobacco in The Southeast of Guizhou Province.[Method]The film-under transplanting supporting technology researches,such as different hole depth test( the designed hole depth was 15,19,23 cm respectively),different orifice size test( the designed hole size was 10,12,14 cm respectively),different punched air hole time test( the designed punched air hole time was no punching,immediately after transplanting,and when the top leaf burst membrane or the temperature was up to 20 ℃,respectively),different bursting membrane time test( the film was burst when the distance from the top leaf to the film was 1 cm,the top leaf burst the film,the the film was burst when the distance from the heart leaf to the film was 1 cm,respectively),different fertilization test( the ratio of basic fertilizers to supplement fertilizers was 7∶3,and the supplement fertilizers were used at covering soil and uncovering film; the ratio of basic fertilizers to supplement fertilizers was 7∶3,and the supplement fertilizers were used at uncovering film only; the ratio of basic fertilizers to supplement fertilizers was 6∶4,and the supplement fertilizers were used at covering soil and uncovering film; the ratio of basic fertilizers to supplement fertilizers was 6∶4,and the supplement fertilizers were used at uncovering film only,respectively),were carried out. [Result]19 cm-hole depth was favor of tobacco seedlings growing,if the hole was too deep tobacco seedlings were harder to grow ridge surface,while if the hole was too shallow tobacco it was hard to reflect the effects of film-under transplanting; 12 cm-orifice size was suitable for tobacco seedlings coming out early and quickly,too small made the humidity in hole was bigger,while too big had worse heat preservation effect; that punched air hole after transplanting was favor of ventilation and decreasing temperature in hole,and made tobacco seedlings adopted to the external environment gradually,sped up their growth; the effects of the treatment of bursting the film when the distance from the heart leaf to the film was 1 cm was better than those of the other two treatments; the effects of the treatment of the supplement fertilizers used at covering soil and uncovering film were better than those of the other two treatments,the tobacco seedlings' growth vigor was same and quicker. [Conclusion]The study provides a theoretical support for establishing the flue-cured tobacco film-under transplanting technology system.