不同土壤类型下高粱主要杂交种出苗能力的差异分析

Variation Analysis of Seedling Emergence Capacity of Sorghum Hybrids Under Different Soil Type

不同土壤类型对高粱出苗能力的要求不同,本试验以国家高粱改良中心主要推广的杂交种为试验材料,通过对比在沙土、壤土以及粘土三类型土壤下不同覆土厚度对高粱出苗率的影响,分析了高粱主要杂交种的出苗能力差异。结果表明:辽粘3号出苗能力最弱,播种厚度不宜过深,尤其是在粘土类型土壤情况下不宜超过20 mm;辽杂15号出苗能力最强,播种时可适当加深,但也以20 mm为宜。不同土质对高粱出苗能力的影响较大,沙土宜深,以不超过25 mm为宜;粘土宜浅,以不超过20 mm为宜。

The requirement of sorghum seedling emergence capacity is varied under different type of soils.In this study,8 sorghum hybrids from national sorghum improvement center were selected as experimental material,and their emergence rate of different hybrids under different thickness of covering soil of sandy soil,fertile soil and clay soil were analyzed.The results suggested that the emergence capacity of Liaonian No.3 is the weakest,and Liaoza No.15 is the strongest,the appropriate thickness of covering soil is around 20 mm;Emergence capacity affected by the soil type.The thickness of covering soil should be less than 25 mm for sandy soil and less than 20 mm for clay soil.