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以棕色蛭石和灰白色蛭石取代琼脂作固相支持物的培养基，观察对马铃薯脱毒试管苗茎节切段的影响。结果表明，采用灰白色蛭石作固相支持物，试管苗生长发育迅速健壮，２周后其植株高度、叶片大小与对照（琼脂为固相支持物）无明显差异，且可进行继代繁殖，根数、根长增长迅速；３周后可利用节数达９节，对照为８．７节，为棕色蛭石作固相支持物的２．５倍；４周后，可利用节数增加缓慢，植株高已达瓶口，生长趋于稳定，与对照无差异。而以棕色蛭石为固相支持物的茎节切段苗生长发育缓慢，植株细弱，继代繁殖利用率低。
Using brown vermiculite and gray vermiculite instead of agar as the medium for the solid support, the effect on the stalk section of potato virus-free test tube was observed. The results showed that the growth and development of test-tube seedlings were rapid and robust with the gray vermiculite as the solid support. After 2 weeks, the plant height and leaf size were not significantly different from those of the control (agar solid phase support) Root number and root length increased rapidly; after 3 weeks, the number of available sections reached 9 and the control was 8.7, which was 2.5 times of that of brown vermiculite as solid support. After 4 weeks, the number of available sections increased Slow, plant height has reached the bottle, growth tends to be stable, no difference with the control. The brown vermiculite solid phase support stem section cut growth, slow plant thin, low succession reproduction.