灌溉环境中的谷物高粱和晚熟帕尔默苋对高粱密度和氮含量的反应

IF 1 4区 农林科学 Q3 AGRONOMY
I. Cuvaca, E. Borgato, Randall Currie, Anserd Foster, K. Roozeboom, Jack Fry, Pat Geier, M. Jugulam
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引用次数: 0

摘要

帕尔默苋的发芽和萌发发生在整个生长季节;然而,人们对晚发帕尔默苋对堪萨斯州主要作物高粱的影响知之甚少。田间研究于 2016 年和 2017 年进行,目的是测量谷物高粱和晚发性帕尔默苋对高粱种群密度和氮肥施用量的反应。处理包括作为主小区的无杂草高粱和杂草高粱,作为子小区的三种高粱种群密度,以及作为子小区处理的三种氮肥施用率,采用随机完全区组设计,并进行了分割-分割-分割小区安排。杂草高粱仅包括晚发的帕尔默苋。2016 年和 2017 年,无杂草高粱的产量分别比有杂草高粱高出 68% 和 45%。在高粱种群密度较高(29.64万株/公顷)的情况下,施用112千克/公顷的氮并不能提高高粱的产量,也不能降低帕尔默苋的数量和高度,但却能增加高粱的头数和高度,并使帕尔默苋的生物量减少65%。总之,我们的研究结果表明,虽然在灌溉环境中结合高粱种群密度(296 400 株/公顷-1)和氮肥施用量(224 千克/公顷-1),有机会保持高粱谷物产量并在一定程度上控制帕尔默苋,但晚发的帕尔默苋仍会造成显著减产(>55%)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Grain Sorghum and Late-emerging Palmer amaranth Response to Sorghum Density and Nitrogen Rate in an Irrigated Environment
Palmer amaranth germination and emergence occur throughout the growing season; however, little is known about the impact of late-emerging Palmer amaranth on sorghum, a major crop in Kansas. Field studies were conducted in 2016 and 2017, to measure grain sorghum and late-emerging Palmer amaranth’s response to sorghum population density and nitrogen rate. Treatments comprised weed-free and weedy sorghum as main plots, three sorghum population densities as sub-plots, and three nitrogen rates as sub-sub-plot treatments laid in a randomized complete block design with a split-split-plot arrangement. Weedy sorghum consisted of late-emerging Palmer amaranth only. Weed-free sorghum out-yielded its weedy counterpart by 68 and 45% in 2016 and 2017, respectively. At high sorghum population density (296,400 plants ha-1), applying 112 kg N ha-1 did not improve sorghum grain yield or decrease Palmer amaranth number and height but increased sorghum head number and height, and reduced Palmer amaranth biomass by 65%. Altogether, our findings suggest that while there is an opportunity to maintain grain sorghum yield and achieve some Palmer amaranth control with the integration of high sorghum population density (296,400 plants ha-1) and nitrogen rate (224 kg ha-1) in an irrigated environment, late emerging Palmer amaranth can still cause significant yield reduction (>55%).
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来源期刊
CiteScore
1.90
自引率
8.30%
发文量
91
审稿时长
1 months
期刊介绍: Published since 1957, the Canadian Journal of Plant Science is a bimonthly journal that contains new research on all aspects of plant science relevant to continental climate agriculture, including plant production and management (grain, forage, industrial, and alternative crops), horticulture (fruit, vegetable, ornamental, greenhouse, and alternative crops), and pest management (entomology, plant pathology, and weed science). Cross-disciplinary research in the application of technology, plant breeding, genetics, physiology, biotechnology, microbiology, soil management, economics, meteorology, post-harvest biology, and plant production systems is also published. Research that makes a significant contribution to the advancement of knowledge of crop, horticulture, and weed sciences (e.g., drought or stress resistance), but not directly applicable to the environmental regions of Canadian agriculture, may also be considered. The Journal also publishes reviews, letters to the editor, the abstracts of technical papers presented at the meetings of the sponsoring societies, and occasionally conference proceedings.
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