甜椒穴盘苗壮苗指数及其与苗期性状的相关性研究

STUDY OF PLUG SEEDLING INDEX OF SWEET PEPPER AND RELATIONSHIP BETWEEN SEEDIGN INDEX AND CHARACTERS

通过对各数量性状的相关性及比值与幼苗质量的关系分析 ,确定了少数最有代表性的数量性状指标 ,找出了适合甜椒穴盘苗的壮苗指数为 :(茎粗 /株高 +根干重 /地上部干重 )×全株干重。同时用通径和灰色关联分析两种方法对壮苗指数与相关性状的关系进行了研究 ,结果表明 :除茎粗外 ,其余性状均呈高度正相关 ;根干重和地上部干重对壮苗指数具有决定性的正向直接作用 ,茎高则具有负向直接作用 ;根干重和地上部干重与壮苗指数的关联度最大。甜椒穴盘苗壮苗应具备干物质含量高 ,根系发达 ,茎高适宜等特点。

By the analysis of the relationship about quantitative characters and the ratio between of characters and seedling quality ,a few of typical indexes were found to be suitable as seeding index :(stem diameter/shoot height + root weight/crown weight)×total weight. Meanwhile path analysis and grey relational grade analysis technique were used to study the relationship between seedling index and seedling characters .The results indicated that except for stem diameter,all characters apper possitively related with eachother,while stem height has negative direct effect .Sweet pepper seedling should have such feature as high dry matter content ,large root system and proper shoot height.