防落素类生长调节剂对甜橙结实和品质的影响

Effect of Sure-set's(PCPA,PBrPA,PIPA)on burliness and qualit of fruit of sweet orange(Citrus sinensis)

１９９０～１９９１年在榕江果树场用防落素（对氯苯氧乙酸）、增产素（对溴苯氧乙酸）和增产灵（对碘苯氧乙酸）５０ｍｇ／ｋｇ，２５ｍｇ／ｋｇ两个浓度，设６个处理，以水为对照，于盛花始期喷冰糖橙、大红甜橙树冠。结果表明，增产素的效果最好。５０ｍｇ／ｋｇ，２５ｍｇ／ｋｇ的增产素分别提高甜橙座果率３９７４％～４９６９％和２５００％～２９４７％；５０ｍｇ／ｋｇ，２５ｍｇ／ｋｇ的防落素分别提高甜橙座果率３２４５％～３７０４％，２５００％～２５１７％，差异显著或极显著。增产素提高单株产量２９２６％～４６１６％；２５ｍｇ／ｋｇ的增产素增加果实Ｖｃ的幅度在４３％～８０９％。

Sprayed Sure-set's(PCPA,PBrPA,PIPA)50 mg/kg and 25 mg/kg in top of sweet orange tree, during early stage on full bloom. The results showed that sprayed PBrPA effect was good. 50 mg/kg and 25 mg/kg can increase rate of set 39 74%～49 69%. PCPA, 50 mg/kg and 25 mg/kg can increase 32 45%～37 04%,25 00%～25.10%.PBrPA raise the per plant yield 29.26%～46 16%. 25 mg/kg PBrPA heighten Vc 4.3%～8 9% content of fruit of sweet orange.