紫色砂页岩在烟草漂浮育苗上的可行性研究

Study on the Feasibility of Purple Sandstone Is Applied to Breed Tobacco Seedling in Float System

通过对云南石林分布的紫色砂页岩进行初步研究表明,该页岩呈弱酸性,自然含水量3%,富含作物所需的多种营养成分和微量的有机质、腐植酸等功能性物质,且其中重金属含量均未超标。通过其与膨胀珍珠岩和多种有机肥按照一定比例进行配比,不仅可以培育出满足优质烟叶生产的适龄壮苗,而且还大大降低了育苗成本,与当前商品用红河基质相比每公顷大田可降低成本168.30元。因此,紫色砂岩是一种比较理想的基质原料,可应用于烤烟漂浮育苗。

The preliminary study on purple sandstone of Shilin area in china showed that this material has rich nutrients for crops required, and also contains a microamount of organic matters and around 3% water, it＇ s pH value is weak acid. In addition , no excessivy metals, e. g. arsenic（ As）, hydrargyrum（Hg） ere were invesitigated. Three mediums that made up the pruple sandstone, expanded perlite and different organic fertilizer with a different ratio, can nurture strong seedlings met the requirement of high - quality tobacco leaf production, also highly reduce the cost of nursery. Compared with Honghe medium, the mediums might reduce 168.30 RMB per hectare tobacco field. Therefore, the purple sandstone is an ideal ingredient for tobacco seedling medium, which proved to be feasible in floating system of seedling nurture.