应用多元回归方法(Wade等,1988;Wade,1990)曾对昆士兰中部高原的高梁和向日葵苗情进行了评鉴(Radford等,1989).结果表明,因苗情不宜可造成籽粒产量的巨大损失.这种减产现象与田间某些地块苗数不足(缺苗断条)和苗数过多(幼苗丛生)有密切关系(Wade等,1991).由于这种回归分析方法尚未经试验单独检验,所以本研究的主要目 Multiple sorghum and sunflower seedling conditions were evaluated using multiple regression methods (Wade et al., 1988; Wade, 1990) (Radford et al., 1989). The results showed that the unacceptable conditions caused great losses in grain yield This yield reduction is closely related to the shortage of seedlings (lack of seedlings broken) and the number of seedlings (seedling emergence) in some plots in the field (Wade et al., 1991). Since this regression analysis has not been tested individually , So the main purpose of this study