Humic substances: effects on potato growth and yield

IF 0.7 4区农林科学 Q4 HORTICULTURE

Horticultura Brasileira Pub Date : 2022-01-01 DOI:10.1590/s0102-0536-20220104

Ricardo Lazzarini, M.M.L Müller, Paulo Ricardo C Lazzarini, Cleto Tamanini Junior, Cinthia K de Matos, J. Kawakami

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引用次数: 0

Abstract

ABSTRACT The results from humic substances (HS) application in varied crops and conditions are controversial, and the experiments with the potato crop in Brazil are scarce. The objective of this study was to evaluate the effects of HS doses on the growth and yield of two potato cultivars. Four doses of HS were tested: 0, 5.05, 10.10, and 15.15 L ha-1, applied in the planting furrows of cvs. Agata and BRS F63 Camila, in Guarapuava-PR, in the 2015 and 2016 crop seasons, between October and February. The experiment was carried out using a randomized complete block design, in a factorial scheme (crop season x dose x cultivar), with four replications. Plant samplings were performed at tuber initiation, flowering, tuber bulking, and plant maturation growth stages. After shoot senescence, the total and commercial tuber yields were evaluated. Cultivars responded similarly to HS application, with no significant interaction between HS and cultivars, for most assessed variables. At tuber initiation, there was a negative linear effect of HS doses on leaf area index, number of formed tubers, and tuber and total plant dry weight. In the other evaluations, the effect of HS application was not observed regarding the assessed variables. Likewise, no effects were detected on the number and fresh weight of tubers in total and commercial yields. We concluded that HS application affected both cultivars similarly, hampering initial plant growth and not increasing potato yield.

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腐殖物质：对马铃薯生长和产量的影响

腐殖物质（HS）在不同作物和条件下的应用结果存在争议，而在巴西对马铃薯作物的试验也很少。本研究的目的是评估HS剂量对两个马铃薯品种生长和产量的影响。试验了四种剂量的HS：0、5.05、10.10和15.15La-1，分别在cvs的种植沟中施用。Agata和BRS F63 Camila，在瓜拉帕瓦PR，2015年和2016年作物季节，10月至2月。该实验采用随机完全区组设计，采用析因方案（作物季节x剂量x品种），进行四次重复。在块茎起始、开花、块茎膨胀和植物成熟生长阶段进行植物取样。在枝条衰老后，对块茎的总产量和商业产量进行了评估。品种对HS施用的反应相似，在大多数评估变量中，HS和品种之间没有显著的相互作用。在块茎起始时，HS剂量对叶面积指数、块茎形成数量、块茎和植株总干重呈负线性影响。在其他评估中，未观察到HS应用对评估变量的影响。同样，在总产量和商业产量中，没有检测到对块茎数量和鲜重的影响。我们得出的结论是，施用HS对两个品种的影响相似，阻碍了植物的初始生长，并没有提高马铃薯产量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Horticultura Brasileira 农林科学-园艺

CiteScore

1.40

自引率

28.60%

发文量

审稿时长

4-8 weeks

期刊介绍： The journal Horticultura Brasileira, a quarterly journal, is the Official Publication of the Sociedade de Olericultura do Brasil. Its abbreviated title is Hortic. bras., and it should be used in bibliographies, footnotes, references and bibliographic strips.