Research Progress of Walnut Flower Bud Morphological Differentiation

Female flower bud morphological differentiation originated within the young shoot buds. Bloom at mid-June to early July( 4-10 weeks long after the spur stop) to the next year,the whole development process takes about ten months,we can visually determine the female flower bud period from the external morphology changes of bud; Regulating the differentiation of buds early and increasing the number of young shoot festival through the cultivation measures,it can improve the quality of female flower buds. Male flower bud morphological differentiation began in daughters first young shoot bud differentiation stage after appearing in axillary bud primordia,cell formation lasted about one year from early April to mid-April next year; Male flower bud and flowering shedding consume too much nutrient of the tree,affect female flower bud and fruit development,we can use measures such as Shu-hung,fruit picking applied fertilizer in fall and fertilizer facilities available in spring and so on to reduce the impact of cultivation. Female first female flower bud varieties differentiation is early than the first male species began. Differentiation in various periods of the first female varieties are always ahead of the first male species,and hung variety male flower bud in each period ahead of the first female variety.