1. 水稻土烟区烤烟不同种植体系对根际 土壤特性及烟叶产质量的影响.
- Author
-
杨宗云, 李顺, 诸泽明, 徐卫学, 秦春丽, 杨加标, 李微杰, 杨树明, and 张素华
- Subjects
- *
SOIL permeability , *SOIL porosity , *SOIL structure , *SOIL density , *SOIL fertility , *POTASSIUM - Abstract
[Objective) The purpose of the paper was to select the best planting mode suitable for improving the soil quality of tobacco-planting paddy soil, as well as the quality and efficiency of tobacco leaves, and effectively integrating flue-cured tobacco with diversified industries in Yunnan province. [Method] Using the flue-cured tobacco variety Yunyan 87 as material, a 3-year field experiment was conducted on paddy soil, and five treatments were set up: Flue-cured tobacco continuous cropping (TI, CK), 2-year alfalfa rotation-1-year flue-cured tobacco rotation (T2), 1-year alfalfa rotation-2-year flue-cured tobacco rotation (T3), flue-cured tobacco intercropping corn (T4), flue-cured to-bacco morchel rotation (T5), to explore the effects of planting patterns on soil physicochemical characteristics, soil microbial quantity, yield and quality of flue-cured tobacco. [Result] Compared with T1 (CK), soil bulk density decreased by 2.47% to 21.77% after rotation and in- tercropping, and soil porosity, cation exchange capacity, contents of organic matter, hydrolyzed nitrogen, available phosphorus and available potassium increased significantly, and soil water soluble chlorine had no significant change. Moreover, it could increase the content of large and medium particle size aggregates and improve the soil structure and stability. The number of fungi, bacteria and actinomyces in rotation and intercropping rhizosphere soil were significantly increased by 61.82%-176.4%, 13.0%-49.73% and 25.38% 130.05%, re- spectively. Meantime, the microbial biomass carbon, nitrogen and carbon nitrogen ratio increased by 13.81% 60.38%, 9.96% 52. 40% and 3.51% -5.48%, respectively. The leaf area, proportion of high-grade, yield and output value of tobacco were significantly increased, and output value of T2 and T5 was the highest, which were significantly increased by 43. 28% and 50.22% compared with T1 (CK), respectively. Compared with T1 (CK), the contents of total sugar, reducing sugar and oxides potassium in T2, T3, T4 and 15 were significantly increased by 13.96%-56.51%, 7.46% -27.91% and 40.76% 52.72%. The contents of total nitrogen and nicotine in tobacco leaf decreased by 4.13% 11.00% and 3.39% -16.41%. [Conclusion] The use of flue-cured tobacco-alfalfa' and flue-cured tobacco-morchella' rotation mode can improve soil fertility, soil permeability, aggregate structure and soil microbial community abundance, which is beneficial to increase tobacco yield and output value, and improve the coordination of tobacco chemical composition. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF