北方地区花芽冻害对密植苹果梨幼树产量的影响

石慧芹宋宝林李成张来生智彬

The Effect of Flower Bud Chilling Injury on Apple-pear Yield of Dense Planting Youth Trees in North Region

北方农业学报 . 2003, (3): 10 -10 .