烤烟不同砂培基质育苗试验

采用不同粒径河砂作为复配基质,研究烤烟砂培漂浮育苗技术。结果表明:与现行漂浮育苗比较,以不同粒径河砂作为复配基质处理的出苗率、成苗率高且出苗整齐,根系发达,生长健壮,干物质积累多;生育期和螺旋根发生率与现行漂浮育苗保持一致,烟苗整体素质高于对照。100%河砂作为基质处理的螺旋根发生率高于对照,生育期推迟2～3天,较复配后漏砂率高,但烟苗整体素质与对照基本一致。综合比较以T6(2.5mm河砂珍珠岩蛭石=8 1 1)最佳。

Study on Flue-cured Tobacco Seedling Growing with Different Sand-matrix Shed

In this study,we use river sand with different particle size as the base material for compound-combin ation,and research seedling cultivation technology of flue-cured tobacco based on sand breeding and float-breeding.The result indicates that comparing with current float seeding cultivation,the technology using sand with different particle size as the base material for compound-combination can make the rate of emergence and the planting percent higher,the emerged seeding grow robust in good order and with developed root system and more dry matter;the growth period and the incidence rate of spiral root stay same with the current float-breeding,and the entire quality of seeding plant is higher than comparison.The incidence rate of spiral root with 100 percent river sand as the base material is higher than comparison,while the growth period is delayed about 2 to 3 days and the sand-missing rate is higher than that after compound-combination.But the entire quality of seeding plant keeps almost the same with the comparison.Therefore,comparing synthetically,the T6（2.5mm river sand perlite： vermiculite = 8 ：1 ：1）is the best condition.