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以10~12年生纽荷尔脐橙为研究对象,研究调查了果实生长发育动态,以期为纽荷尔柑桔脐橙的栽培技术及管理措施提供理论依据。结果表明:果实生长从5月中旬花谢幼果期开始,11月中下旬以后停止生长,生长期达175~182d,果实纵横径生长量出现4~5次高峰,其中果实纵径出现4次,果实横径出现5次,都存在开始较快,然后最快,以后又较快,后接近成熟时生长缓慢,直至最后停止生长,形成一条逐渐上升的生长曲线;果实纵横经的净生长量均出现6次高峰,其生长曲线呈多S型生长曲线;纽荷尔脐橙果实成熟期在11月下旬至12月上旬,此时果实风味最好;果实成熟时,纵径为(62.61±5.33)mm,横径为(55.83±5.11)mm,果形指数为1.12,果实椭圆形,果表底色为绿色,果皮颜色为橙红色。建议在上年加强水肥管理和当年施好催芽肥的前提下,以6月下旬为最佳施肥时期,并在果梢生长旺期加强根外追肥2~3次,以缓解梢果养分竞争矛盾,又可提高果品质量。
Taking 10 ~ 12-year-old Newhall navel orange as the research object, the dynamic growth and development of the fruit were investigated to provide a theoretical basis for the cultivation techniques and management measures of Newhall citrus navel orange. The results showed that the growth of fruit began from the middle of May in Huaying young fruit stage, and stopped growing in the middle and late November. The growth period reached 175 ~ 182 days, and the vertical and horizontal growth of fruit appeared 4 ~ 5 times. The diameter appeared five times, both of them began to start fast, then fastest, then fast, and then grow slowly when approaching maturity, until finally stopped growing, forming a gradually increasing growth curve; The growth curve of the Newhall navel orange fruits had the highest S-shape growth curve at the 6th highest peak. The fruit of Newhall navel orange had the highest ripeness at the end of November to early December, and the fruit length was (62.61 ± 5.33) mm , Diameter (55.83 ± 5.11) mm, fruit shape index of 1.12, oval fruit, fruit table green color, peel color is orange-red. Proposed to strengthen the management of fertilizer and fertilizer in the previous year and good germination of fertilizer premise, in late June for the best fertilization period, and in the growing season of fruit tip to strengthen the root top-dressing 2-3 times in order to alleviate the contradiction between nutrient competition , But also improve the quality of fruit.