Effects of Different Amounts of Biochar on Soil Nutrients of Flue-cured Tobacco in West Hunan
SONG Liang
REN Tianbao
LI Min
ZHOU Yajun
YANG Yongfeng
YUN Fei
LIU Guoshun
Abstract：In order to determine the most suitable biochar dosage for flue-cured tobacco in West Hunan, a field experiment was conducted with different amounts of biochar[ T1:no fertilizer,T2:conventional fer-tilization,T3—T6:450(T3)、900(T4)、1350(T5)、1800(T6) kg/ha biochar based on conventional fer-tilization with nitrogen amount reduced by 5%,10%,15%,20%] . The results showed that on the whole, with the increase of biochar amount,the soil organic content increased,and the organic content order was T3—T6>T1,T2,the organic content was the highest at 60 d after transplanting,the organic content of T6 treatment was the highest with 37. 83 g/kg at this time,which increased by 24. 72%,22. 11% compared with T1,T2 treatments. Compared with T1 and T2 treatments,the application of biochar increased soil available nitrogen,phosphorus and potassium contents,which first increased and then decreased with the increase of biochar amount, soil available nitrogen, phosphorus contents of T3 and T4 treatments were higher,available potassium content of T5 treatment was the best,followed by T4 treatment. The pH value and the ratio of carbon to nitrogen of soil were increased with the application amount of biochar,and the pH value increased by 7 . 65%—13 . 75% and 5 . 28%—11 . 25% compared with T1 and T2 treatments respectively. In short,the application of biochar could notably improve the soil nutrients,and T4 treatment worked best to application for demonstration in the region.
Keywords：biochartobacco-planting soilratio of carbon to nitrogensoil characteristics
Publication Date：2017-01-31
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：6( 43-48 )