栽培措施对白肋烟生长发育和产质量的影响

采用正交试验,对影响白肋烟产质量及烟碱含量的环剥与打顶、留叶、施氮量及采收方式4个栽培因素进行了研究,结果表明:采收方式是影响产量的主要因素,整株采收产量最低,全摘叶采收产量最高;氮肥用量12.5~15.5kg/667m2对产值影响最大;环剥是影响烟碱含量的主导因素,其中初花打顶后根基处环剥,能有效抑制烟株后期根系发育,烟碱含量降低。最佳栽培技术组合为留叶24片、初花打顶根基处环剥、施氮量12.5kg/667m2、全摘叶采收,其次是留叶22片、初花打顶根基处环剥、施氮量14kg/667m2、半整株采收。

Effects of Cultural Practices on Growth, Development, Yield and Quality of Burley Tobacco

The cultural factors,such as circular barking,topping,number of leaves,N application rates and(harvesting) manner were studied with orthogonal experiment in Jianshi county.The results showed that harvesting manner was a major factor affecting yield,the highest yield was obtained by priming and the lowest yield by stalk-cutting;N application rates of 12.5-15.5 kg/667m~2 was a key factor affecting output value;the root development was significantly restrained by circular stalk barking after topping at early flowering stage,and the nicotine content decreased accordingly.The best cultural practice was 24 leaves,topping at early flowering stage and circular stalk barking at root base,N application rate of 12.5 kg/667m~2 and harvesting by priming,and the better was 22 leaves,topping at early flowering stage and circular stalk barking at root base,N application rate of 14kg/667m~2 and priming before stalk-cutting harvesting.