ABSTRACT

The study sought to investigate the internal cycling of phosphorus (P) in Clementine mandarin (Citrus reticulata Blanco “Clementine”). The biomass formation, P concentration, P uptake and accumulation of different organs (bud, flower, fruit, leaf and branches) identified as active organs and found on 1-year-old shoots on fruit trees of bearing age were periodically examined for 2 years. The biomass value was similar between both production seasons. At the beginning of shoot activity, the biomass of annual shoots had a very low rate in the total biomass (0.4%). The biomass increased from 9.7 kg/tree at the beginning of the production season to 62.8 kg/tree at harvest. The P concentrations were in the ranges of 0.11–0.22% in the branches of <1-year-old shoots throughout the 2 years, 0.07–0.15% in the branches of 1-year-old shoots, 0.17–0.31% in the leaves of <1-year-old shoots and 0.13–0.26% in the fruits of <1-year-old and 1-year-old shoots. The total P accumulation at harvest was 82 and 107 g/tree in the first and second years for <1-year-old shoots, respectively, while it was 44 and 48 g/tree for 1-year-old shoots, in the first and second years respectively. The mean daily P uptake amount was determined as 0.4 g/tree for both production years, and the highest daily P accumulation amount was between the fifteenth and twenty-eighth days for both production seasons.

摘要

该研究旨在调查柑桔柑桔 ​​( Citrus reticulata Blanco ) 中磷 (P) 的内部循环。“克莱门汀”）。在 2 年的时间里，定期检查在生育期果树上 1 年生芽上发现的不同器官（芽、花、果实、叶和树枝）的生物量形成、P 浓度、P 吸收和积累. 两个生产季节之间的生物量值相似。在枝条活动开始时，一年生枝条的生物量在总生物量中所占的比例很低（0.4%）。生物量从生产季节开始时的 9.7 公斤/树增加到收获时的 62.8 公斤/树。2年中<1年生枝条的P浓度范围为0.11-0.22%，1年生枝条的P浓度范围为0.07-0.15%，叶片中的P浓度范围为0.17-0.31% <1 年生芽和 0.13-0.26% 在 <1 年生和 1 年生芽的果实中。收获时的总磷积累量在第一年和第二年分别为 82 克和 107 克/树，对于 <1 年生的嫩枝，而对于 1 年生的嫩枝，第一年的总磷积累量分别为 44 和 48 克/树。分别是第二年。两个生产年份的日均磷吸收量确定为 0.4 g/树，两个生产季节的最高日磷积累量在第 15 天和第 28 天之间。