摘要
选择具有代表性的水田和山坡2个类型土壤种植的已结果的‘沙糖桔’果园,采集叶片、树体和果实样品,测定其不同生育期的元素含量,分析2种种植类型的‘沙糖桔’营养元素含量季节性动态变化和各元素需求比例,提出适合当地‘沙糖桔’生长所需的营养元素施肥配方。结果表明:(1)P在开花期需求最高,K在开花期至幼果期需求最高;Ca和Cu在开花期最低,之后逐渐升高,成熟期达到最高;而Mg、Zn、Fe、Mn、B需求量均为开花期稍低,但是各生育期需求较为稳定。(2)水田种植的沙糖桔树体中大量元素N、P、K和中量元素Ca、Mg含量普遍高于山坡种植的;前者微量元素Cu、Zn、B含量低于后者,而微量元素Fe、Mn含量有相反的趋势。(3)根据多个果园的数据分析,生产1t的‘沙糖桔’果,需N1.242kg、P0.138kg、K1.366kg、Ca0.476kg、Mg0.126kg、Fe0.72g、Mn0.97g、Cu2.47g、Zn1.58g、B1.34g;根据肥料利用率和柑桔类果树的氮磷钾施肥比例,推算生产1‘t沙糖桔’时全年应施N12.95～15.11kg,P2O57.77～9.1kg,K2O12.95～15.11kg。
To study nutrition characteristic and directions of fruit-bearing tree of Citrus reticu]ata ＇ Shatangju＇ in Yunan, Guangdong. The two types of the citrus orchard grew on paddy fields and hillside soil were selected to determine the element content of leaves, trunk and fruit samples collected in the different growth stages, to analyze the seasonal dynamics and the proportion of each element demand, to put forward the suitable nutrient directions for the growth of Citrus. The results showed that： （1） the highest demand for P for all growth stages was in the flowering stage; K demand was the highest between in the flowering stage; Ca and Cu demand was the lowest in flowering period, increased graduall stage and in the young fruit y after the flowering period, and, the highest in the maturity period; Mg, Zn, Fe, Mn, B demand were slightly lower in flowering period compared with the other growth stages, but was relatively stable demand for all growth stages. （2） The content of N, P, K, and of Ca, Mg element in the trunk of Citrus. In the paddy soil was generally higher than those in the hillside soil; the content of Cu, Zn, B in the former was less than those in the latter, while the Fe, Mn content was the opposite trend. （3） According to the data analysis of multiple orchards, 1 ton of ＇Shatangju＇ fruit produced need to N 1.242 kg, P 0.138 kg, K 1.366 kg, Ca 0.476 kg, Mg 0.126 kg, Fe 0.72 g, Mn 0.97 g, Cu2.47 g, Zn 1.58 g, B 1.34 g; According to fertilizer utilization and the proportion of NPK fertilizer, N 12.95-15.11 kg, P2057.77-9.1 kg, K20 12.95-15.11 kg should be applied throughout the year if the yield of 1 ton of citrus was obtained.
出处
《中国农学通报》
CSCD
2012年第19期279-285,共7页
Chinese Agricultural Science Bulletin
基金
广东省院战略合作项目"珠江三角洲土壤质量与农产品安全关键技术应用"(2011B090300052)
广东省科技计划项目"沙糖桔农业地质和保持原产地品质的营养调控研究"(2007B020500002-10)
关键词
'沙糖桔’
水田和山地
营养配方
动态变化
比例关系
Citrus reticulata ＇Shatangju＇
paddy and hillside soil
seasonal dynamics
proportion
nutrition directions.
