【摘要】 <正> 果树栽培上合理留果的重要意义在理论上虽早有定论,但长期以来在生产中却难以推广应用,存在着片面追求多结果,忽视果实质量的倾向。这样既影响了栽培者的收益,又阻碍了市场商品果质量的提高,直接影响了水果生产的经济收益和社会效益。更多还原

【Abstract】 The economic benefit of single tree of Hangzhoa Mili (namely kikusui which is a ev. of Pyrus pyrifolia Nakai) grafted on the stock of Pyrus ealleryana Dcnc with different number of fruit-bearing was analysed from 1984 to 1986 in Hangzhou Fruit Tree Institute. The planting density was 41 trees per mu and the production of which was about 2000kg. The result is as follows: The correlation of the number of the fruit-bearing of a single tree and the production was logarithmic curve. The correlative coefficient was 0.857 in 1984, 0.746 in 1985, the relationship between the former and the percentage of grade.A fruit was very significantly negative correlation, the coefficient was-0.907 in 1984. The corretation of the number of fruit-bearing and the vatue of production was parabola curve. According to the recent market price, the number of fruitbearing of 500—600 is good for a single tree namely 20000—24000 fruits per mu.更多还原