论文部分内容阅读
在高肥力土壤上,研究烟草套种不同作物,筛选出适宜的套作模式,以达到降低烟草后期养分供应,解决后期烟叶贪青,促进烟叶正常成熟。试验结果表明,与烤烟单作相比,烟田套种白菜、马铃薯和黑麦草在烟草不同生育期能显著降低土壤NO3--N和NH4+-N含量;其它养分含量也都有不同程度的降低。不同套种处理对烟叶产量的影响不显著;除套莱豌豆外,套种白菜、马铃薯及黑麦草能改善烟叶化学成分的协调性,提高烟叶的评吸质量,使烟草产值比单作烟草提高13.73％-33.20％。
In high-fertility soils, we studied the intercropping of tobacco with different crops and screened suitable intercropping patterns to reduce the supply of nutrients in the late stage of tobacco so as to solve the problem of late greyness and promote the normal maturation of tobacco. The results showed that tobacco seedling cabbage, potato and ryegrass significantly reduced soil NO3 - N and NH4 + -N contents at different growth stages of tobacco. Compared with single crop, the other nutrient contents also decreased to some extent. The effects of different intercropping treatments on the yield of tobacco were insignificant. Intercropping cabbage, potato and ryegrass could improve the coordination of the chemical constituents of tobacco leaves and improve the smoking quality of tobacco leaves, and increase the tobacco output value by 13.73% -33.20%.