应用CPPU增大辽伏苹果果实的效应研究

在盛花后２周和３周，以不同浓度的ＣＰＰＵ［Ｎ－（２－ｃｈｌｏｒｏ－４－ｐｙｒｉｄｙ）－Ｎ＇－ｐｈｅｎｙｌｕｒｅａ，通用名称Ｆｏｒｃｈｌｏｒｏｆｅｎｕｒｏｎ］对辽伏苹果果实进行表面喷雾处理，结果表明：２０、４０ｍｇ·１￣（－１）ＣＰＰＵ能促进果实纵径和横径增长，并明显提高单果重、果形指数和可食率。对果实可溶性固形物和可滴定酸含量的影响则因处理时期和使用浓度而异。盛花后２周使用降低可溶性固形物含量，４０ｍｇ·１￣（－１）ＣＰＰＵ处理增大果点和提高果实畸形率。而盛花后３周果面喷布２０ｍｇ·１—（－１）ＣＰＰＵ可以增大辽伏苹果果实２０％左右，对果实品质和花芽分化无不良影响。

Effect of CPPU on the Fruit Growth of ''''Liaofu'''' Apple Cultivar

Aqueous solutions of CPPU[N-(2-chloro-4-pyridyl)-N’-phenylurea]were sprayed on ‘Liaofu’applefruit 2 and 3 weeks after full-bloom. The results revealed that CPPU at 20mg·1￣(-1) or 40mg·1￣(-1) stimulatedfruit growth both in longitudinal and latitudinal dianieter,and increased the fruit weight(in 18%-20%),thefruit L/D ratio and the fruit edible rate significantly. The influences on brix and titratable acidity varied withconcentrations and timing. CPPU at 20mg·1￣(-1) was recommended to be used by spraying on fruitlet 3 weeksafter full-bloom for apple commercial production in Hubei Province and South China.