不同水分条件下保护性花椰菜硅积累的研究

IF 0.7 4区 农林科学 Q3 AGRICULTURE, MULTIDISCIPLINARY Pesquisa Agropecuaria Brasileira Pub Date : 2022-01-01 DOI:10.1590/s1678-3921.pab2022.v57.02392
G. S. Wenneck, R. Saath, Roberto Rezende
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引用次数: 4

摘要

摘要本研究的目的是测定不同水分置换水平和硅含量下花椰菜(Brassica oleracea var. botrytis)植株各组分硅的积累情况。试验设计为随机完全区组,设3种水分置换条件(40%、70%和100%蒸散),4种Si速率(0、50、100和150 kg ha-1), 4个重复。每日蒸散量用恒定地下水位溶渗仪测定,用滴灌系统换水。作为硅的来源,氧化硅在作物周期中被施用三次-在植物的初始,中间和最终发育阶段。在循环结束时,收集植物组织(根、茎、叶和花序)和土壤样品,用光谱法测定Si。土壤中硅含量不受水分置换的影响,只受硅酸盐施肥的影响。土壤施硅增加了植物各组成部分,尤其是根部的元素含量。水分的补充影响了花椰菜组织中硅的积累,在水分不足的条件下,硅的含量较低。
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Silicon accumulation in cauliflower grown in a protected environment with different water availability conditions
Abstract The objective of this work was to determine the accumulation of silicon in the plant components of cauliflower (Brassica oleracea var. botrytis) grown with different levels of water replacement and rates of Si. The experimental design was a randomized complete block with three water replacement conditions (40, 70, and 100% evapotranspiration), four Si rates (0, 50, 100, and 150 kg ha-1), and four replicates. Daily evapotranspiration was determined with constant water table lysimeters, with water replacement by a drip system. As a source of Si, silicon oxide was applied three times in the crop cycle - at the initial, intermediate, and final development stages of the plant. At the end of the cycle, samples of plant tissue (root, stem, leaves, and inflorescence) and soil were collected to determine Si by spectrometry. The Si content in the soil was not influenced by water replacement, only by silicate fertilization. The silicon applied to the soil increased the content of the element in the plant components, especially in the roots. Water replacement influences the accumulation of Si in cauliflower plant tissues, with lower amounts of the element under water deficit conditions.
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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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