<正>从杉木遗传测定林中选择36株杉木优良个体进行组培快繁技术研究，在对36株杉木优良个体进行诱导、继代培养的基础上，筛选出5个优良无性系建立了相应的组培快繁技术体系。诱导培养基：l/2MS+6-BA（0.3～0.8nag/1，）+蔗糖（3%）；继代增殖培养基：1/2MS+6-BA（0.5～0.7mg/L）+IBA（0.1～0?3mg/L）+蔗糖（3%）；生根培养基：1/4改良MS+IBA（0.5～1.0mg/L）/NAA（0.5～1.0mg/1，）/ABT1#（1.0～1?5mg/L）+蘸糖（1.5%）；组培苗移栽基质中，m（黄心土）：m（细沙）=9：1.采用该技术体系的杉木组培苗生根率可达90%。移栽成活率可达96%。

Superabsorbent polymers (SAP) were made from carboxymethyI cellulose (CMC), acrylic acid (AA), acrylamide (AM). and [2- (methylacryloyloxy) ethyl]trimethylammonium chloride (DMC.) through graft copolymerization’. The factors affecting the water-absorbent capacity of SAPs, such as monomers ratio, CMC dosage, content of initiator and crosslinking agent, and neutralization degree of AA, were investigated and discussed in detail. The optimal conditions were found to be as follows: m(AA):m(AM):m(DMC)=1.86: 1.00 : 0. 31; neutralization degree of AA, 75%; CMC dosage, 5%; initiator content, 2. 5%; crosslinking agent content, 0. 1%, reaction temperature, 60 ℃; reaction time, 45 rain. Amphoteric SAPs, with the absorbent capacity of 1 503 times their own weight in distilled water and 165 times in 0.9% salt solution under optimized synthesis condition, were obtained.