不同处理方法对美国截叶胡枝子种子发芽的影响  

Effect of the Different Treatments on the Germination Rate of Lespedeza cunecta

作　　者：拉旦[1] 欧阳克蕙[2] 王堃[3] 

机构地区：[1]青海省草原总站,青海西宁810001 [2]江西农业大学动物科学技术学院,江西南昌330045 [3]中国农业大学草地研究所,北京100094

出　　处：《四川草原》2006年第4期14-16,共3页Journal of Sichuan Grassland

摘　　要：美国截叶胡枝子的硬实率很高,发芽率只有17.3%。经过种子预处理,如采用不同温度下浸种、98%浓硫酸浸泡、机械破皮和机械破皮结合热水浸种等处理,结果表明,机械破皮后用60℃热水浸种处理的效果最好,发芽势和发芽率分别达到64.0%和74.3%;其次是机械破皮,平均发芽率达到50%;浓硫酸浸种可以显著提高种子发芽势,浓硫酸浸种5min效果最好,发芽率达到44.7%;热水浸种的处理效果不佳,最好的90℃热水浸种处理发芽率也仅有26.7%。The rate of hard coated seeds of Lespedeza cunecta is very high, so the germination rate is only 17.3%. In order to overcome the traits, several different ways of treatig hard coated seed were studied, such as dipping seeds in water in different temperatures, in the 98% H2SO4 solution in different time, and destroying the seed-coat by machine then dipping in water. The results showed that the most effective method was the way of destroying the seed- coat by machine then dipping in water of 60℃, the potential germination and the rate of germination respectively were 64.5%, 74.3%.And the second effective method was the way of destroying the seed-coat by machine, average rate of germination was 50%. By means of dipping in 98% H2SO4 solution germination rate of 44.7%. But the effect of dipping in hot water was lasting 5 min appeared not significant. significant improvement in

关 键 词：美国截叶胡枝子 种子发芽势 种子发芽率 种子预处理 

分 类 号：S541.5[农业科学—作物学]