砂梨小果成因及其克服技术途径

Studies of Causes and Technical Methods of Prevention of Fruitlet Formation in Sand Pear

１９９１～１９９４年，以五三农场果园为基点，采用普查，结合田间小区设计试验和室内样品分析，研究查明砂梨小果成因。通过疏花蔬果控制负载量；整形修剪改善光照；施用钾肥促使物质运转与积累；人工授粉提高果实种子数量与质量，促使梨树稳产、果大的技术效应明显。

During the period of 1991～1994, field investigations and experiments, integrated with labortory analyses were carried out on the fruit trees of Wushan farms orchard. The causes of fruit let formation in Sand Pear (Pyrus pyrifolia Nakai) were determinded, and the following methods produced significant effects in stablizing the yield and enlarging fruit size: controlling the crop load by thinning flower and thinning fruit;improving light intensity by training and pruning;stimulating the transportation, transformation and accumulation of substances in the body of the trees by applying potassium;--increasing the quantity and quality of seeds by artificial pollination.