漂浮育苗不同基质对烤烟苗生长的影响
关键词:
- 河砂 /
- 河泥沙 /
- 山沙 /
- 烤烟 /
- 漂浮育苗
摘要: 为降低不可再生资源草炭的开采，采用漂浮育苗方式，研究河砂、河泥沙、山沙和常规基质共4种基质对烤烟烟苗生长的影响。结果表明，河砂、河泥沙和常规基质出苗率都高于90％，螺旋根发生率小于2％；河砂、常规基质利于根系生长，烟苗一级侧根数、二级侧根数和根系体积表现最佳的为河砂基质；河泥沙和常规基质在播种40 d后烟苗硝酸还原酶（ N R）活性高于河砂和山沙基质；地上、地下部干鲜质量以常规基质和河砂基质较大；河砂和山沙基质烟苗根系活力较高。常规基质的烟苗素质优于其他3种，同时也表明河砂基质具有较好的烟苗素质，而河泥沙基质的烟苗素质相对较差。
On Effects of Different Matrix on Flue-Cured Tobacco Growth in Floating System
Keywords:
- 河砂 /
- 河泥沙 /
- 山沙 /
- 烤烟 /
- 漂浮育苗
Abstract: In order to reduce the exploitation of peat in non‐renewable resources ,based on floating‐seedling system mode ,researched relations on grow th of flue‐curedtobacco seedlings and four substrates (River sand ,riversediment ,MountainSandand conventionalnursery substrate) .The studies show thatriver sand , river sediment andconventionalmatrixemergence ratearehigher than 90% ,thehelicalrootincidenceisless than 2% ;river sand ,conventionalmatrixconducive to rootgrowth ,thetobacco seedlingsanumber of lateral roots , twolateral root numberandroot volumeperformancebestriver sandmatrix ;river sediment and conventional matrix sowed 40d the tobacco seedlings NR activity are higher than the river sand and mountain sand ;ground and underground fresh and dry weight on the conventional the seedling matrix and river sand ma‐trix were weight larger ;river sand and mountain matrix quality tobacco seedling roots strong vitality ex‐hibit higher .The conventional tobacco seedlings nursery substrate qualities is superior to the other three , w hile river sand matrix also show s that the quality of the good tobacco seedlings ,the relatively poor quali‐ty of river sediment matrix of tobacco seedlings .
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