恩施烟区培育壮苗的加热技术研究初报

摘要

Different electric heating wires at bottom of seedling pool were applied to increase its temperature during tobacco seedling stage and search for method of decreasing seeding time and promote the growth of tobacco seedlings by improving the nutrient solution and the surface temperature. The results of the experiment showed that electric heating could increase the seedling pool water temperature, thus improving the growth and quality of tobacco seedlings, resulting in the time reduction of tobacco seedling. Therefore, with regard to geographical characteristics in Enshi, we suggest that electric heating wires at bottom of the seedling pool with 10 W/m2, 20 W/m2 and 40 W/m2 should be applied to seedling pools in low mountain, subalpine and alpine, respectively, so that seedlings can be transplanted timely.%通过对育苗池底施加不同功率的地热线，拟探索通过苗床加热提高漂湿育苗营养液和盘面温度满足烟苗生长发育，为恩施烟区培育适时烟草壮苗提供科学的育苗方法。研究结果表明，育苗池底铺加地热线均能提高育苗温度和烟苗的生长速度，有效缩短烟苗育苗时间，促进了烟苗生物量的积累，烟苗的整体素质有一定提高。因此，结合恩施烟区地理特征，低山、二高山和高山烟区可分别在育苗池内底部铺加10、20和40 W/M2功率地热线加热，满足烟苗生长所需的温度条件，确保烟苗适时移栽。