印度的荔枝多栽培在石灰性土壤上,尤其在比哈尔邦,那里的土壤含自由碳酸钙高达40.5%。目前印度荔枝的成熟期较集中,采收期很短,只有20天,而芒果主栽品种的成熟期则要长的多(约40天)。在生产上,果农希望延长荔枝的果实采收期,这样可以避免因集中采收而使市场价格下降。荔枝采收期通常从5月的最后一周到6月中旬。此期常因干热风、日烧和裂果而严重影响荔枝的产量和品质。应用生长调节剂促使果实提前成熟已证明对某些果树品种是有效的(Singh 等,1978)。本文是研究应用生长调节剂对促进荔枝提前成熟的效 Indian litchi is grown more on calcareous soil, especially in Bihar, where the soil contains as much as 40.5% free calcium carbonate. At present, lychee is more mature in India with a short harvest period of only 20 days, while mango cultivars have a much longer maturity (about 40 days). In production, farmers want to extend the harvest of litchi fruit, so as to avoid concentrated recovery of the market price decline. The harvest of litchi is usually from the last week of May until mid-June. This period often due to dry hot air, burning and cracking fruit and seriously affect the litchi yield and quality. Application of growth regulators to promote premature fruit ripening has been shown to be effective for certain fruit tree varieties (Singh et al., 1978). This article is to study the application of growth regulators to promote premature ripening effect of litchi