不同处理对北方嵩草种子萌发的影响  

Effect of different treatments on seed germination of Kobresia bellardii

作　　者：李巧峡[1] 李凯[1] 丁文龙[1] 张浩勇[1] 高洁琼[1] 赵庆芳[1] 

机构地区：[1]西北师范大学生命科学学院,甘肃兰州730070

出　　处：《草业科学》2009年第8期112-117,共6页Pratacultural Science

基　　金：甘肃省中青年基金项目(3YS061-A25-030);西北师范大学校青年基金(NWNU-QN-05-40)

摘　　要：用3种不同质量浓度的化学试剂（NaOH、GA和CaCl2）分别处理北方嵩草Kobresia bellardii种子，将其置于5、10、15、20和25℃恒温条件下进行光照培养。结果表明，温度和3种化学试荆及化学试剂的不同质量浓度显著影响种子的萌发率、萌发指数及幼苗高度（P〈0．001）。且温度对种子的萌发影响更大。北方嵩草种子在10～25℃奈件下萌发，适当质量浓度的3种化学试剂对种子的萌发均有一定的促进作用。在低温下，较高质量浓度的化学试剂处理的种子其萌发率和萌发指数较高；而在较高温度下，较低质量浓度的化学试剂处理的种子其萌发率和萌发指数较高。在20和25℃，对照组及用3种化学试剂处理的种子其萌发率和萌发指数较高，幼苗生长较快。其中在25℃，用5g／L CaCI2处理种子其萌发率最高，可达84％；在20℃，用20g／LNaOH处理种子其萌发速率最快，萌发指数最高，为5．26。The study on the seed germination of Kobresia bellardii under different temperature （5, 10, 15, 20 and 25 ℃） and different concentration of three chemical solutions （NaOH, GA and CaCl2） was conducted. The result indicated that the temperature and three chemicals and concentration had significant effect on seed germination rate, germination index and shoot length （P〈0. 001）. Moreover, the temperature contributed more to the seed germination than the chemicals. The germination temperature range was from 10 to 25 ℃, but the growth of shoot, germination rate and germination index were higher at 20 and 25 ℃ than those at 10 and 15℃. The higher chemical concentration promoted the seed germination rate and germination index at lower temperature, however, the lower chemical concentration was favorable to the seeds germination at higher temperature. Under 25 ℃, the best treatment was to soak the seeds in CaCl2 solution with a concentration of 5 g/L, the germination rate was highest and could reach 84%. At 20℃, to deal with the seeds in NaOH solution with a concentration of 20 g/L, the highest germination index （5.26） could be reached.

关 键 词：北方嵩草 温度 化学试剂 种子萌发率 萌发指数 

分 类 号：S548[农业科学—作物学]