摘要
利用3个气候带5个产地的马尾松(PinusmassonianaLamb)种子,采取2种贮藏方法贮藏,在采种后11a里对贮藏种子逐年进行品质测定。常温开放贮藏法,种子贮藏3~4a发芽率降到2%~0%,几乎丧失生活力;而2~4℃低温密封贮藏法,可使北亚热带种子贮藏8a,中亚热带种子10a以上,南亚热带种子3~4a,此时,种子发芽率仍能保持在贮藏前发芽率的70%。可供生产上继续使用。贮藏种子必须是发育正常、完全成熟的种子,为此应在最适采种期采种。),相关极紧密(详见图2)。2.3.3 发霉率 5个产地的种子发霉率在贮藏期间均以二次抛物型曲线增高(图3)。河南桐柏,浙江淳安和永康产地的发霉率随贮藏年限的增长缓慢增高,三者的变化趋势较一致。而浙江仙居和广西宁明种子在贮藏期间发霉率则迅速增高,两者的变化趋势也较一致。不同产地种子贮藏前及贮藏第6年以前均无空粒,第7年至第11年空粒逐渐增多,其年增长率是中、北亚热带为1%~6%,南亚热带为1%~20%。2.3.4呼吸强度为了进一步说明不同产地种子的生活力,将贮藏第4年的种子进行呼吸强度测定。贮藏在低温密封条件下的种子呼吸强度:中亚热带100粒种子每小时CO2释放量为4.4?
The seeds of masson pine from five seed sources within three climate zoneswere
stored in two ways.The quality of the stored seeds was measured year by year in 11years after
seed collection.The results showed that,using the method of open storage in theair,the
germination rate of the seeds was reduced to 2%~0%after 3~4 years and the vital-ity were
forfeited entirely,while using closed storage method under low temperature of 2~4℃,the
seeds from northern subtropical zone could be stored for 8 years,middle subtropicalzone over
10 years,and southern subtropical zone 3~4 years,when their germination ratewere still over
70% of the originai germination rate,and the stored seeds could still be usedin production.The
stored seeds must be developed normally and ripen completely,and soshould be collected in
optimum seed-collecting time.
出处
《林业科学研究》
CSCD
北大核心
1994年第2期193-198,共6页
Forest Research
基金
"八五"国家攻关课题
关键词
马尾松
种子品质
贮藏
采种期
masson pine,seed quality,long-term
storage,seed-collecting time