白皮糯米糍荔枝果实生长发育与裂果的关系

Relationship Between Fruit Development and Cracking in Litchi

对白皮糯米糍荔枝（米枝）果实生长发育规律进行研究，发现其果实前期和中期发育均比较缓慢，盛花 ５５～６０ ｄ后，果实鲜重、干重、果实横径生长和果实体积增长均迅速增加，在盛花后 ７５ ｄ左右达到峰值，从而诱发严重裂果。在果实生长发育过程中，提高树体营养水平，喷施果皮增韧剂，促进幼果发育，维持果实横径生长速率的相对稳定，是预防米枝果实裂果的有效方法。

The relationship between fruit development and cracking of Litchi chinensis Sonn. (var. white peel Nuo Mi Ci) was studied. It was observed that litchi fruit grew slowly at early and middle stages, The fresh weight, for weight and volume of the fruit increased rapidly at 55-60 days after blossoming and reached the peak value at about 75 days after blossoming, which induced serious fruit cracking. Spraying peel toughening agent with organic nutrition could promote young litchi fruit growth and keeping the volume increase stably. It was an effective method to prevent litchi fruit cracking.