KClO3对龙眼产期的调控效应

以自行配制、主要有效成份为KClO3的龙眼产期调控剂进行田间试验．结果表明：催花土壤施用剂量以每平方米树冠面积180g效果最佳；不同品种龙眼对药物的敏感程度不同，以石硖、储良龙眼最为敏感，平均抽花率可达80％以上．不同季节和不同梢期施药，龙眼抽花率存在显著差别；药剂干施回泥后淋水、干施淋水后回泥和拌水淋施这3种土壤给药方式的促花效果差异不显著；反季节与正造栽培收获的龙眼相比，果实质量存在一定差异，春季收获的果实个大肉厚，外观较佳，但糖份含量等品质指标则较差．KClO3调控龙眼产期的效果明显，配合相应的树体管理和土壤水分养分调控措施，可实现龙眼产期的人工合理控制．表7参20

EFFECTS OF KClO3 ON FLOWERING AND FRUITING OF LONGAN (DIMOXARPOUS LONGANNA)

The effects of chemical regulators, a major component of KClO 3, on flowering and fruit quality of longan (Dimoxarpous longanna) in field were studied in Maoming, Guangdong, where is mainly production region of longan. The results indicted that flowering and yielding were significantly different due to different chemicals doses applied. The dose of 180 g per m 2 tree cover areas could achieve the best effect. The varieties Shixia and Chuliang were most sensitive to the chemical. For the longan of 6 to 12 years old, the similar effects of applied chemical on the induced flowering are observed, but the mature shoot was better than the shoot in early red leaf flushes. Furthermore, the effect of induced flowering by the chemical in dried season (from august to winder) was better than that in wetness season. The off-season longan fruit quality was different from the normal harvest fruit and fruit quality can be improved by harvesting in later spring and early summer. It is suggested that the treatment with the chemical regulators in early autumn plus harvesting fruit in later spring or early summer be suitable for the off-season longan fruit production in the study region. Tab 7, Ref 20