Fruit bearing number and seed yield of Chinese chestnut increased over 20 percent with spraying treatment of TDS plant growth regulator solution (0.25, 0.5, 0.75, 1.0 percent) after revealing of male ...inflorescence. Besides spraying treatment, TDS solution can be used to inject into trunk or pour on roots of Chinese chestnut. There are obvious effect of increasing fruit bearing number and seed yield when mixture solution (TDS and isopentenyl adenine, 500 mg/kg or TDS and paclobutrazol 500 mg/kg) is used. It is conducive to TDS’s regulation to apply fertilizer in winter or in spring. The results showed that fruit bearing number and seed yield of Chinese chestnut could be raised every year, when TDS regulator was used every year. 在板栗雄花序开始出现前后,以0.25%～1.0%的TDS调节剂喷布处理,均能提高板栗结果率20%以上,但以0.5%较为合适。除了喷布处理外,TDS也适合注干和浇根处理。如在喷布时配合喷施多效唑(PP333)或异戊烯腺嘌呤(IPA)500mg/kg,表现明显的增效作用。在冬季或春季施肥也能提高TDS的增产效果。试验结果表明,每年喷施TDS,可年年获得增产。
This paper deals with the effect of TDS regulator on the photosynthetic rate, accumulation and product transport in the adult leaves on fruiting branch during the young fruit developmental period of ...Chinese chestnut and its mechanism. The results indicated that (1)the photosynthetic rate in the leaf treated with TDS regulator(1% and 0.5%)were 4.3 and 2.8 times greater than that in the untreated leaf;(2) the accumulated amount of total soluble sugar and sucrose during the day in the treated leaf(23.9% and 25.9%) were higher than those in the untreated leaf(6.8% and 15.1%);(3)the decreased amount of total soluble sugar,sucrose and starch during the night were obviously more in the treated leaf than those in the untreated leaf. The former were 15.8%,11.7% and 1.7%,while the latter were 10%,3.2% and 0.9% respectively. TDS调节剂处理对板栗(Castanea mollissima Bl.)具有提高结果率和增加产量的作用1,2,但对其促进增产的生理基础尚未得到充分阐明。前文3报道了板栗在开花前或现蕾时用TDS调节剂处理增加了叶片叶绿素含量和蔗糖含量,表明TDS调节剂的作用可能与光合作用有一定关系。
