4种农作物种子加热超干燥的效应研究

1材料与方法 1．1材料供试材料为2005年采收后开放贮存的4种农作物种子：豇豆、笋玉米、萝卜和油菜。种子量各为10k。试验地点为国家蔬菜系统工程技术研究中心品种资源研究室的发芽室。

Effects of Ultra-drying Treatment on Large Amounts of Four Kinds of Crop Seeds

This study was to understand the physiological changes of four kinds of crop seeds including baby corn, cowpea, radish and rapeseed, under the treatment of ultra-drying. Large amounts of seeds as experimental materials (10 kg for each material) were respectively dried to the suitable water content consistent with the ultra-dried seed criterion via heating at 50 ℃; then the physiological indices of these ultra-dried seeds such as water content, seed germination, dehydrogenase activity and SOD activity were measured. The results showed that except cowpea seeds, whose ultra-drying treatment should be controlled between two and four days, other three kinds of seeds were tolerant to high temperature and low water content. The ultra-dried seeds assumed similar or even higher activities than CKs, but showed no damage symptom. Our result proves that ultra-drying treatment via heating at 50 ℃ is safe and efficient to experimental seeds.