考察了螺纹雷松藻茎的吸水特性及粉碎和挤压两种预处理方法对其吸水规律的影响. 结果表明，水在藻茎中的临界渗透距离约为2 mm，当藻粒粒度不大于临界渗透距离的2倍时，藻粒在6 h内可被浸透；挤压后藻茎中的裂缝增多增大，吸水率提高，149 MPa下浸泡6 h吸水率可达250%. 粉碎和挤压预处理后的藻茎在浸泡时被充分浸润，消化速率显著提高. 挤压后藻茎部分细胞壁被破坏，消化期的前3 h消化速率最大.
The water absorption characteristics of Lessonia trabeculata stipe and the effects of smashing and squeezing pretreatment methods on water absorption were investigated. The results showed that the critical penetration distance of water in the stipe was about 2 mm. When the size of stipe particles was twice times less than the critical penetration distance, the algal particles could be sufficiently penetrated and saturated by water in 6 h. As the crack of stipe was grown and enlarged with the increase of squeezing pressure, the water absorption rate increased to 250% at 149 MPa in 6 h. Since stipe was sufficiently soaked in water after pretreatment, the alkaline extraction speed could be remarkably raised. Especially when some cell walls were destroyed by squeezing, the extraction speed was the highest during the earlier 3 h of extraction.
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