摘要： 在控制水分、肥料的条件下，用盆栽试验研究土壤容重对玉米苗期生长的影响。结果表明，土壤容重对玉米苗期生长影响显着。随着土壤容重的变化，玉米根系及地上部都随之发生一定的变化。在一定范围内，随着土壤容重的增加，玉米的根长逐渐变短，而其直径则逐渐变粗。同时根干重及株高等均与土壤容重呈显着或极显着的线性回归关系，表现为负相关。而就地上部干重及T/R值（冠/根比值）来讲，则呈现二次曲线关系，当容重为1.30g/cm³左右时达到最大值。另外土壤容重对玉米叶片生长也有一定的影响。

关键词: 玉米, 苗期生长, 土壤容重, 土壤物理性状

Abstract: The influence of volume weight of soil on maize seedlings growth was researched under condition of controlling water and fertilizers.The results indicated that the influellce of volume weight of soil on maize seedlings growth was significant.Following soil volume weight change,maize root and its aerial part all generate corresponding change.Within a cer tain extent,the relation between maize root length and volume weight of soil appeared signifi cant linear negative correlation.The volume weight of soil was larger,length of maize root was shorter, and root diameter was bigger.Meanwhile the relation between dry weight of root, tall of plant and volume weight of soil all appeared significant linear regression,which was negative correlation.The dry weight of aerial part and the top root ratio (T/R) and vol ume weight of soil was relation of guadratic function.While volume weight of soil is near1.30g/cm³,the dry weight of aerial part gets to maximum.The volume weight infuleuces also growth of maize leaves.

Key words: Maize, Seedlings growth, Volume weight of soil, Soil physical characters

中图分类号: 

• S513.061