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1999年春 ,用从日本引进的 4个砂梨品种作接穗 ,对一片 5年生劣质低产梨园实施高接换种。通过近 4年对引进梨品种的物候、生长习性、经济性状、抗性等多项指标和因子地观察、调查 ,较系统地研究了梨引进品种的适应性。结果表明 ,以丰水梨品种适应性较强 ,其次为湘南和新世纪 ,而金二十世纪适应性较差。在 5年生大砧上实施高接换种 ,第二年就开始结果 ,结果株率达 3 0 %以上 ,且有一定的经济产量 ,每 666.7 达 15 0～ 2 0 0kg,第 3、4年结果株率达 10 0 %,每 666.7 达 5 0 0～ 80 0kg ,具备良好的丰产性能。根据观察和调查结果 ,对今后梨树生产和劣质低产梨林改造提出了合理化建议
In the spring of 1999, four sand pear varieties introduced from Japan were used as scions, and a 5-year-old low-yield inferior pear plantation was put in place. Through the past four years on the introduction of pear varieties phenology, growth habits, economic traits, resistance and many other indicators and factors observed and investigated more systematically studied the adaptability of pear varieties introduced. The results showed that Fengshui pear cultivars were more adaptable, followed by Shonan and New Century, while Jin adaptability was poorer in the twentieth century. In the 5-year-old large anvil on the implementation of the high accession, the second year began the results, the results of the plant rate of 30% or more, and have a certain economic output, 666.7 up to 150 ~ 200kg, the third and fourth years The results showed that the plant rate reached 100%, reaching to 600 ~ 80 kg per 666.7, with good yield performance. Based on the observations and the survey results, reasonable suggestions are put forward for the future transformation of pear production and inferior low-yielding pear