Effects of Water-modified Biochar and Its Extract on the Growth and Development of Flue-cured Tobacco
In order to explore the effects of water-modified biochar and its extract on the growth and quality of flue-cured tobacco,six treat-ments were set up in this study,fresh biochar(X0),water-modified biochar(WZ),water-modified biochar extract stock solution(W0),water-modified biochar extract diluted 50 times(W50),water-modified biochar extract diluted 100 times(W100),conventional fertilization(CK).The results showed that the application of water-modified biochar and different multiple extracts could promote the improvement of ag-ronomic traits,dry matter accumulation,nitrogen,phosphorus and potassium accumulation of flue-cured tobacco.In the rosette stage of flue-cured tobacco,the plant height and maximum leaf length of WZ treatment increased by 75.85%and 20.58%respectively compared with CK treatment,and the accumulation of root and leaf increased by 89.05%and 61.27%respectively compared with CK treatment.In the vigorous growth period of flue-cured tobacco,the biomass accumulation of root,stem and leaf of flue-cured tobacco in WZ treatment increased by 33.89%,41.15%and 46.50%respectively compared with CK treatment.At the squaring stage of tobacco plants,the root volume of X0 treatment was the best,which increased by 69.91%compared with the control treatment.The main root length of tobacco plants treated with WZ reached the maximum value of 54.13 cm,which was 16.84%higher than that of CK treatment,and reached a significant difference.Except for W0 treat-ment,the root activity of tobacco plants in other treatments was significantly higher than that in CK treatment.The leaf nitrogen accumulation of W100 treatment was 26.72%higher than that of X0 treatment,and the phosphorus accumulation was 118.18%higher than that of CK treatment.The potassium accumulation in root,leaf and whole plant of WZ treatment was the highest,which was significantly different from that of CK.The potassium accumulation in root and leaf increased by 37.50%and 86.09%,respectively,compared with the control group.There was no signifi-cant difference in potassium accumulation in leaves among different dilutions of extract.The direct application of water modified biochar solid and extract could promote the growth of flue-cured tobacco and improve the yield and quality.
万方数据
维普
