花芽是梨树产量形成的主要因素，掌握花芽分化规律，是制定栽培技术的重要理论依据。关于大南果等四个新品种的花芽分化尚未见报道，为此我们于１９９８、１９９９年对大南果四个新品种进行了花芽形态分化观察，从而明确了各品种花芽分化各个时期，以便及时实行促花措施，达到 Flower buds are the main factors for pear yield formation. To master the law of flower bud differentiation is an important theoretical basis for formulating cultivation techniques. For the four new varieties of Da Nan fruit flower bud differentiation has not been reported, for which we in 1998 and 1999 on the four new varieties of Da Nan fruit flower morphological differentiation observed, so that each species of flower bud differentiation of various periods, so that In a timely manner to promote flowers to achieve