【摘 要】
：
该研究针对日光温室土壤盐渍化日益严重的现状,以所征集到的西瓜砧木为试材,筛选适宜设施栽培的耐盐西瓜砧木,并对其耐盐机理作了探讨.研究结果表明:1.各砧木品种耐盐性差异
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该研究针对日光温室土壤盐渍化日益严重的现状,以所征集到的西瓜砧木为试材,筛选适宜设施栽培的耐盐西瓜砧木,并对其耐盐机理作了探讨.研究结果表明:1.各砧木品种耐盐性差异较大,其中三丰瓠瓜、线瓠子、北京极早熟冬瓜、一串铃小冬瓜等6个品种耐性较强,可耐受浓度为300mmol.L<-1>的NaCl;清风瓠瓜、绿宝小冬瓜、金钩南瓜王等12个品种耐盐性中等,可耐受225mmol.L<-1>的NaCl;韩育瓠子瓜、无蔓四号等耐盐力最弱,只能耐受150mmol.L<-1>的NaCl.相同盐浓度下,耐盐品种生长势明显高于盐敏感品种.2.选用耐盐级别不同的瓠瓜砧木与野生西瓜为试材研究耐盐机理.3.以三丰瓠瓜、野生西瓜作砧木,京欣二号西瓜作接穗验证瓠瓜嫁接苗的耐盐性,结果表明:三丰瓠瓜嫁接苗表现出对盐胁迫较强的耐受性,其各项生理生化指标变化趋势与砧木相同,嫁接苗生长势强.4.选用自根的京欣二号西瓜为对照,将三丰瓠瓜嫁接苗、野生西瓜嫁接苗定植于日光温室中,测定其在生产上的应用性,结果表明三丰瓠瓜嫁接苗表现出较强的生长势,株高、茎粗明显高于自根苗及野生西瓜嫁接苗,产量明显提高,单果重和总产量分别比对照高出12.8％、13.6％.5.嫁接后西瓜风味虽然有所下降,但其营养物质含量仍比较高.6.通过嫁接试验及耐盐机理研究和产品品质分析,结果表明三丰瓠瓜可作为设施西瓜栽培的耐盐砧木.
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