Acai palm base temperatures and thermal time requirements in eastern Amazon

IF 0.7 4区 农林科学 Q3 AGRICULTURE, MULTIDISCIPLINARY
D. P. Sousa, Julio Cesar Vieira Frare, V. Farias, H. Nunes, Maurício Souza Martins, Ana Flavia Trindade de Lima, Lucas Belém Tavares, D. Costa, M. Lima, Cláudio José Reis de Carvalho, P. Souza
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引用次数: 0

Abstract

Abstract The objective of this work was to deter mine the base temperatures, thermal time requirements, and length of the main reproductive growth stages of acai palm (Euterpe oleracea) in the northeast of the state of Pará, in eastern Amazon, Brazil. The experiment was carried out from 2017 to 2019 in a 10 ha acai plantation, using the time-series analysis. Plant phenology was monitored weekly, and local weather conditions were monitored daily. The lower and upper base temperatures were of 12.92 and 32.46°C, respectively, for pre-flowering; 13.50 and 32.23°C for flowering; 12.14 and 32.55°C for green fruit stage; 11.64 and 32.78°C for fruit color-changing stage; and 11.23 and 32.94°C for maturation. The thermal time requirement and the average cycle length for the ideal harvest time of acai palm were 3,893.15 degree-days and 283 days, respectively. The thermal time requirement and the duration of the reproductive growth stage for acai palm are influenced by the period of the year and the variability of air temperature, which, when high, reduces the cycle of the crop, and when mild, increases it.
亚马逊东部巴西莓棕榈基底温度和热时间要求
摘要本研究的目的是确定巴西亚马逊东部帕尔州东北部巴西莓棕榈(Euterpe oleracea)的基本温度、热时间需求和主要生殖生长阶段的长度。该实验于2017年至2019年在一个10公顷的巴西莓种植园进行,采用时间序列分析。每周监测植物物候,每天监测当地天气状况。开花前底温最高为32.46℃,最低为12.92℃;13.50℃和32.23℃开花;青果期12.14℃、32.55℃;果实变色阶段为11.64℃和32.78℃;成熟温度分别为11.23℃和32.94℃。巴西莓理想采收期所需热时间为3893.15度d,平均周期长度为283 d。巴西莓的热时间需求和生殖生长阶段的持续时间受一年四季和气温变化的影响,气温高时,作物周期缩短,气温温和时,作物周期增加。
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来源期刊
Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuaria Brasileira 农林科学-农业综合
CiteScore
1.20
自引率
0.00%
发文量
45
审稿时长
9-18 weeks
期刊介绍: Pesquisa Agropecuária Brasileira – PAB – is issued monthly by Empresa Brasileira de Pesquisa Agropecuária – EMBRAPA, affiliated to Ministry of Agriculture, Livestock and Food Supply. PAB publishes original scientific-technological articles on Plant Physiology, Plant Pathology, Crop Science, Genetics, Soil Science, Food Technology and Animal Science. Its abbreviated title is Pesq. agropec. bras., and it should be used in bibliographies, footnotes, references and bibliographic strips.
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