Influence of Organic Fertilizer Sources and Application Rates on Onion Production in Georgia, USA

IF 1 4区 农林科学 Q3 HORTICULTURE
Hanna Ibiapina de Jesus, Andre Luiz Biscaia Ribeiro da Silva, B. Dutta, K. Cassity‐Duffey, T. Coolong
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Abstract

A range of organic fertilizers are available for vegetable crops; however, there is a lack of information regarding the performance and rates of organic fertilizers commonly used in the production of Vidalia onion (Allium cepa). Two commercial organic fertilizers, a mixed source organic fertilizer [MIX (10N–0.9P–6.6K)] and a pelleted poultry litter [PPL (5N–1.8P–2.5K)], were evaluated in two soil types at application rates of 0, 100, 150, 200, 250, and 300 lb/acre nitrogen (N) to determine their impact in the production of Vidalia onions in Georgia, USA, with the objective of determining an optimal fertilizer source and application rate. Field trials were conducted in the 2019–20 and 2020–21 growing seasons in Watkinsville, GA, USA (Cecil series sandy clay loam soil) and Tifton, GA, USA (Tifton series loamy sand soil) on certified organic land. There were significant interactions among location, year, and fertilizer application rate for total marketable yield. In Watkinsville, total marketable yields of onions at different N rates ranged between 1320 and 4565 lb/acre in 2019–20, and between 9951 and 28,749 lb/acre in 2020–21. In Tifton, total marketable yields ranged from 3776 to 9264 lb/acre and 7094 to 14,066 lb/acre in the 2019–20 and 2020–21 seasons, respectively. Aboveground onion N accumulation at harvest was affected by an interaction among location, study year, and fertilizer rate. The largest plant N accumulation was in Watkinsville in 2020–21, ranging from 26 to 50.8 lb/acre N in the 0- and 300-lb/acre N treatments, respectively. In 2020, there were no differences in soil inorganic N at harvest between plots receiving the MIX (9 lb/acre N) or PPL (9.8 lb/acre N) in either location. In 2021, soil inorganic N was greater in plots receiving the MIX fertilizer (14.8 lb/acre N) compared with the PPL fertilizer (11.2 lb/acre N). Yields increased linearly with additional fertilizer; therefore, an optimal application rate for organic fertilizers was not determined.
有机肥来源和施用量对美国乔治亚州洋葱生产的影响
蔬菜作物可使用一系列有机肥料;然而,在生产葱(Allium cepa)中常用的有机肥的性能和比率方面缺乏资料。在美国乔治亚州的两种土壤类型中,评估了两种商业有机肥,混合源有机肥[MIX (10N-0.9P-6.6K)]和颗粒状家禽粪便[PPL (5N-1.8P-2.5K)],施氮量分别为0、100、150、200、250和300磅/英亩(N),以确定其对Vidalia洋葱生产的影响,目的是确定最佳肥料来源和施肥量。田间试验于2019-20和2020-21生长季在美国乔治亚州沃特金斯维尔(塞西尔系列砂质粘土壤土)和美国乔治亚州蒂夫顿(蒂夫顿系列壤土)的有机认证土地上进行。对总可售产量而言,地点、年份和施肥量之间存在显著的交互作用。在沃特金斯维尔,2019 - 2020年,不同氮肥水平下洋葱的总可售产量在1320至4565磅/英亩之间,2020-21年在9951至28749磅/英亩之间。在蒂夫顿,2019-20和2020-21季节的总市场产量分别为3776至9264磅/英亩和7094至14066磅/英亩。收获期洋葱地上部氮素积累受地点、研究年份和施肥量的交互作用影响。2020 - 2021年,沃特金斯维尔植株氮积累量最大,在0和300磅/英亩氮处理下,氮积累量分别为26 ~ 50.8磅/英亩。2020年,在混合施肥(9磅/英亩N)和PPL(9.8磅/英亩N)的地块之间,收获时土壤无机氮没有差异。2021年,施用MIX肥(14.8 lb/acre N)的地块土壤无机氮含量高于施用PPL肥(11.2 lb/acre N)的地块。因此,没有确定有机肥的最佳施用量。
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来源期刊
Horttechnology
Horttechnology 农林科学-园艺
CiteScore
2.30
自引率
10.00%
发文量
67
审稿时长
3 months
期刊介绍: HortTechnology serves as the primary outreach publication of the American Society for Horticultural Science. Its mission is to provide science-based information to professional horticulturists, practitioners, and educators; promote and encourage an interchange of ideas among scientists, educators, and professionals working in horticulture; and provide an opportunity for peer review of practical horticultural information.
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