【摘要】 在鄂中低山丘陵区，对１６年生大年结果树进行疏花疏果试验表明，每厘米主干周长负载４果，是适宜的负载量指标。按此指标疏花疏果，树体每年新生枝发生量约７０条，成花率在３２％左右，表现出花质最好，花朵坐果率高达４５％，产量变异系数小于５％。在稳定获得３９ｔ／ｈｍ２产量的同时，单果重≥１６６６ｇ的等级果率超过６５％或７０％。更多还原

【Abstract】 In hilly areas of Hubei Province, thinning of flower and fruit on sand pear (Pyrus pyrifolia ) Var. Okusankichi trees, which were 16 years old and in a fruitful year, was performed by the 4 crop load test respectively with the fruit number 2,4,6,8 of per cm trunk perimeter. The result showed that 4 fruits per cm trunk perimeter was an index of crop load that suited the needs of local conditions. Thinning flower and fruit according to the index, yearly, resulted in about 70 sprouts per tree, and flower bud formation about 32%. The quality of flowers was better and fruit set reached 45%. The coefficient of yield variation <5% and yield of 39t/hm 2 was attained consistently; meanwhile, the standard fruit ratio with fruit size no less than 166 6g was above 70%. It was pointed out that popularization of thinning flower and fruit is the most important technical way to obtain high and stable yield and excellent quality of local Okusankichi.更多还原