江沫石是火山喷发时溢出的岩浆遇冷后凝固而成的石头,多为灰白色,也有青灰色的。石体粗糙,凹凸不平,有蜂窝眼。江沫石的比重轻,浮力大,在水中不沉底。传统的底浮钓是利用塑料泡沫的浮力,辅以塑料空心发卷粘住钓饵,作为钩头,再与铅坠匹配,制成底浮钓组。这种钓组虽然浮力较大,但由于制作钩头的泡沫和发卷都是化工原料,有股刺鼻的气味,且颜色鲜艳,极容易引起大鱼的警觉。2003年夏,笔者在对传统底浮钓组研究的基础上,采用江沫石代替泡沫和发卷,制作底浮钓鲢 Jiang Mo stone volcanic eruption is overflowing when the magma after freezing solidified stone, mostly gray, but also gray-green. Rough rough, rugged, with honeycomb. Jiang foam the proportion of light, buoyant, not sinking in the water. The traditional bottom float fishing is the use of plastic foam buoyancy, supported by plastic hollow curly sticky fishing bait, as the hook head, and then match with lead, made of the end of the floating fishing group. Although this group of buoyancy buoyancy larger, but because of the production of hooks foam and curls are chemical raw materials, a pungent odor, and bright colors, it is easy to cause big fish alert. In the summer of 2003, based on the study of the traditional bottom float fishing group, the author replaced the foam and curly hair with Jiangshoushi to make the bottom float silver carp