晚秋叶面喷肥对设施杏发育前期的影响

晚秋叶面喷肥增加树体的营养积累是非常有效的办法,充足的营养供给是保证果实细胞分裂的重要条件,也为果实增大奠定了基础。晚秋叶面施氮肥影响了设施杏树花前枝条内的激素含量变化,ABA和GA在杏树的解除休眠过程中起着重要的作用,3%、5%尿素对枝条内激素的影响更有利于解除休眠和芽的生长发育。不同的尿素浓度都影响了树体枝条内花前激素的含量,显著增加了前期的新稍生长量,对果实的纵横径也有不同程度的影响。3%左右的尿素浓度更适宜于在设施内杏树晚秋追肥中应用。

Effect of Foliar Fertilization in Autumn on Fruit Development of Apricot in Protected Cultivation

Autumn foliar treatment was effective to increase the nutrition accumulation of fruit tree, opulent nutrition supplying assured the fruit cell splitting, meanwhile it was the base of fruit size increasing. Autumn nitrogen treatment influenced the hormone content in stick of apricot grown in plastic greenhouse before blooming, ABA and GA were important during the course of dormancy breaking in apricot, the urea treatment of 3% and 5% influenced the hormone content in stick which was beneficial to dormancy breaking and bud developing. Different concentration of urea all influenced the hormone content in stick before blooming, that increased the new shoot growth amount in former period as well as promoted the fruit diameter in length and breadth. To sum up, the urea concentration about 3% was more suited for autumn foliar treatment of apricot in protected cultivation.