新疆3种锦鸡儿属植物种子萌发对温度和土壤水分的响应  

Response of seed germination of three Caragana species to temperature and soil moisture

作　　者：李晓梅[1] 赵晓英[1] 赵法[1] 郭名军[1] 

机构地区：[1]新疆师范大学生命科学与化学学院,新疆乌鲁木齐830054

出　　处：《草业科学》2009年第10期140-145,共6页Pratacultural Science

基　　金：国家自然科学基金资助项目(3066035);新疆维吾尔自治区高校科研计划重点项目(XKEDU2007S26);新疆师范大学珍稀濒危物种保护生物学重点实验室

摘　　要：白皮锦鸡儿Caragana leucophloea、草原锦鸡儿C.pumila和刺叶锦鸡儿C.acanthophylla均为旱生灌木,在植被恢复中具有潜在的价值。通过萌发试验,研究3种锦鸡儿种子萌发对昼夜变温和土壤水分的响应,及其萌发物候。结果表明:3种锦鸡儿种子在10/6℃、15/6℃、20/10℃、25/15℃和30/20℃昼夜变温(昼12h/夜12h)均能萌发。试验条件下,启动它们萌发的最低土壤水分含量为2.50%。白皮锦鸡儿和草原锦鸡儿种子萌发速度快,在种子成熟的当年就能萌发出苗,刺叶锦鸡儿由于部分硬实种子,直到来年还有幼苗出土。Caragana leucophloea, C. purnila and C. acanthophylla are xeric shrubs, which have potential value in vegetation restoration. Effects of alternated temperature and soil moisture on seed germination and germination phenology of 3 species were studied. Alternating temperature regimes of 10/6, 15/6, 20/10, 25/15 and 30/20℃ were used while the photoperiod condition was 12 h/12 h. The results indicated that the soil moisture to trigger the germination was 2.5% for 3 species. The germination speed of C. leucophloea and C. pumila were fast and the germination could complete at the same year of the seed maturation, and could finish the emergence. But the seedling emergence was long for C. acanthophylla because of hard seeds.

关 键 词：白皮锦鸡儿 草原锦鸡儿 刺叶锦鸡儿 种子萌发 温度 土壤水分 萌发物候 

分 类 号：S793.3[农业科学—林木遗传育种]