摘要
采用不同药种比例、晾晒和装袋方法,研究了包衣技术对谷子种子贮藏期的水分和活力的影响.结果表明:(1)种子包衣有利于保持种子发芽率和活力,增强种子耐贮性.安全水分下,药种比1:70的种子可以安全贮藏到隔年播种,1:50～60的种子隔年播种时需适当加大播量.(2)降低种子含水分量是保持包衣种子发芽率和活力的重要保证.低于安全水分1%以上的种子发芽率保持最好,隔年可安全播种;高于安全水分的种子当年播种以及接近安全水分的包衣种子隔年播种,均需适当加大播量.(3)适当的包衣药种比、晾晒时间、晾晒厚度是控制种子含水量进而影响贮藏期间种子活力变化的主要因素.不同药种比的种子,薄层晾晒0.5～1 h或厚层晾晒2 h,均可使种子含水量稳定在安全水分以下;不晾晒的编织袋袋装种子,只有在药种比1:70、敞口1～4 h时,含水量才可稳定到安全水分以内.(4)随贮藏时间的延长,种子发芽率在降低过程中有回升现象,回升时间与播种季节相吻合.
Adopting a system of seed processing equipment,the effe ct s of seed coating on seed moisture content,germination rate and vigor during sto rage in foxtail millet were studied.The results showed that: ⑴ Seed coating wa s a better way for keeping higher seed vigor during storage than one without coa ting.The seeds treated with the 1∶70 ratio between coating agents and s eed could be stored safely until the second planting season. ⑵ It was importan t to reduce coated seeds moisture for keep higher seed vigor during storage. Th e coated seeds with the moisture content below 12% had higher germination rate a fter storing 16 months. ⑶ Suitable ratios between coating agent and seed,sprea ding time and thickness in the air were major factors for reducing seed moisture content and keeping seed vigor during storage. The moisture content of seeds a fter coating could be reduced to blow 13% through spreading coated seeds on the ground in the sun for 0.5～1 h by thin,and 2h by thick layer.The moisture content of coated seeds without spreading in the sun could be reduc ed to below 13% when seed treated with1∶70 ratio between coating agent a nd seed and opening in the air for 1～4 h.(4)The arising of germination perce ntage happened to the coated seeds at each planting season during storage,especi ally for the seeds with lower moisture content.
出处
《河北农业科学》
2005年第1期15-20,共6页
Journal of Hebei Agricultural Sciences
基金
河北省科技厅科技攻关重点项目 (95220102D) 部分研究内容
