油菜毯状育苗的基质改良Ⅰ常规育苗基质细土添加比例

Improved substrate suitable for rapeseed blanket seedling Ⅰ Addition of conventional nursery substrate fine soil

以甘蓝型双低油菜品种宁杂1818为材料,设置了常规育苗基质中不同细土添加比例处理,通过测定不同时期菜苗的农艺性状、各器官干物质积累量等,探索适合油菜毯状苗生长的常规育苗基质适宜的拌土比例。结果显示,常规育苗基质中分别加入50%和30%的过筛细土,秧苗的根颈粗、干重、子叶大小及其增速最优,移栽前毯状苗存苗率和株高分别高出其它处理10%以上。综合油菜苗素质及经济效益等因素,常规育苗基质中添加30%细土作为油菜毯状苗育苗基质最为适宜。

To optimize nursery substrate soil for rapeseed(Brassica napus L.) blanket seedling, different fine soil addition ratios in conventional seedling substrate were set and studied. Cultivar Ningza 1818 was used as material. By measuring agronomic traits and dry matter accumulation of various organs of rape seedlings at different periods, appropriate soil mixing ratio in conventional seedling substrate for blanket seedling growth was explored. Results showed that when 50% or 30% of sieved fine soil were added to the conventional seedling substrate, root neck thickness, dry weight, cotyledon size and growth rate were the best. Moreover, both survival rate and plant height were 10% higher than those of other treatments. Accounting for quality of rapeseed blanket seedling and economic benefits, the most suitable mixture by 30% fine soil in the conventional substrate was the best seedling substrate for rapeseed blanket seedling.