果树生产应注意的几个技术环节赵艳华（黑龙江省农科院牡丹江农科所）近几年来，牡丹江市果树生产发展很快，全市果树面积由１９９０年的１０万亩发展到现在的２１万亩，并且今后还要以每年３～４万亩的速度发展，到本世纪末累计将达到４０万亩。随着果树生产的大发展，笔... Fruit tree production should pay attention to several technical aspects Zhao Yanhua (Heilongjiang Academy of Agricultural Sciences Mudanjiang Agricultural Institute) In recent years, fruit production in Mudanjiang City has developed rapidly, the city’s fruit tree area from 10 million mu in 1990 to the present 21 million mu In the future, it will also grow at an annual rate of 3 to 40,000 mu and will reach 40 million mu by the end of this century. With the great development of fruit tree production, pen ...