Effects of Two Kinds of Trichoderma Preparations on the Growth of Flue-cured Tobacco
In order to actively respond to the protection action of Erhai and alleviate a series of problems caused by the long-term large-scale use of chemical pesticides.[Method]The effects of biological pesticides (Trichoderma preparations) were used to explore the effects of Trichoderma of Dongfangnongyun (T1),Trichoderma harzianum of Youwomei (T2) and water treatment (CK) on the survival rate of flue-cured tobacco transplanting,agronomic traits in different periods,biological yield,economic characters,chemical composition of tobacco leaves after roasting,and the prevention and control effect of black shin disease in Wanqiao Town,Dali City.[Result]The results showed that the sur-vival rate of transplanting of each treatment was 100％,but the growth of tobacco seedlings T1>T2>CK,and the maximum plant height of tobac-co seedlings treated with T1 was 18.6 cm,and compared with CK,the two Trichoderma preparations had different degrees of growth promotion effect on the agronomic traits of flue-cured tobacco at different growth stages.T1 and T2 in the clumping stage significantly increased plant height and maximum leaf area by 8.53％,37.41％,2.38％ and 14.73％,respectively.T1 and T2 increased stem circumference and maximum leaf area by 8.68％,30.78％,0.68％ and 23.99％,respectively.The maximum leaf area of T1 and T2 during the baking period increased significantly, which increased by 33.36％ and 13.95％ compared with CK,respectively.Under the condition of equal fertilization,the economic traits and bio-logical yield of tobacco leaves after roasting increased with the application of Trichoderma preparation,and the dry weights of T1 and T2 tobacco leaves after treatment were 256.4 and 229.0 g,respectively,which were 55.4 and 28.0 g higher than CK,respectively,and the yield of T1 and T2 treatments could increase by 534.58 and 207.30 kg/hm2 ,respectively,and their output values were 8102.15 and 3621.34 yuan/hm2 ,respec-tively.The contents of total sugar and reducing sugar in the middle of T1 and T2 flue-cured tobacco were higher,the ratio of chlorine and sugar to alkali was lower,and the chemical composition of tobacco was more coordinated.Compared with CK,the application of Trichoderma milderella preparations could reduce the incidence and disease index of black shin disease,T1 and T2 had obvious effects on the incidence and disease in-dex,the incidence and disease index of T1 and T2 reached 4.00％,1.85,3.33％ and 1.93,respectively,and the control effect reached 53.27％and 51.40％,respectively.[Conclusion]The application of Trichoderma preparations had a certain role in promoting the growth and development of flue-cured tobacco and could prevent and control black shin disease,reduce the occurrence of black shin disease and improve the quality of flue-cured tobacco and the taste of tobacco leaves.
万方数据
维普
