摘要： Wade多元回归模型曾用于高粱和向日蔡苗情评鉴。但由于这种方法尚未经试验单独检验，所以，本研究旨在通过田间试验验怔并进一步改进该模型。结果表明，预则籽粒产量与实测籽粒产量之间非常吻合，说明山苗情不宜预测籽粒产量损失的回归分析法可靠。晚出苗植株比早出苗植株对产量的贡献小，即使在稀植条件下也是如此。断条超过2m以上显著减产。目前，正研究确定苗情是否适宜和是否需要补种的简单方法。

关键词: 向日葵, 苗情不宜, 产量, 回归模型

Abstract: Establishment of sorghum and sunflower was once evaluated, using a multiple regression technique of Wade's.Since the technique had not been independently validated, (ic!d experiments were conductcdlo verily and to further improve this regression.Results showed that there was good agreement between predicted and observed grain yield, which indicated the effectiveness of the method.Late emerging plants contributed less gram yield than early ones, even whcn they had enough space.Gaps greater than 2 meters reduced yield significantly.

Key words: Sunflower, Poor stands, Regression model