Biomass, nutrient accumulation, and weed suppression by mix of cover crops

IF 0.9 4区农林科学 Q3 AGRONOMY

Revista Caatinga Pub Date : 2023-01-01 DOI:10.1590/1983-21252023v36n403rc

Mariana A. Silva, Adriano S. Nascente, Laylla L. de M. Frasca, Anna C. Lanna, Mabio C. Lacerda, Cristiano B. da Silva

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引用次数: 0

Abstract

ABSTRACT Cover crops, isolated or mixed, provide several benefits to agricultural systems, such as nutrient cycling and weed control. The present study aimed to determine the biomass production and nutrient accumulation of a cover crop mix and its effects on weed suppression (biomass production), in the off-season, in a no-tillage area in the Cerrado region. The experimental design was in randomized blocks with six treatments and eight replications. Treatments comprised five cover crop mixes plus the control treatment (fallow). Mixes of cover crops, cultivated between grain harvests in a no-tillage system in the Cerrado region, efficiently reduced weed shoot biomass in the three evaluation periods, 30, 70, and 210 days after sowing. Additionally, it is concluded that the mixes 5 (Black oats, Buckwheat, Millet, Piatã grass, and Crotalaria ochroleuca) and 4 (C. spectabilis, Buckwheat, Pearl millet, and Crotalaria breviflora) are the best among those evaluated for Cerrado conditions because they produce more biomass in the offseason, due to the greater availability of nutrients to the soil, in addition to providing less biomass of weeds compared to fallow.

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覆盖作物混作对生物量、养分积累和杂草抑制的影响

覆盖作物，无论是单独的还是混合的，都为农业系统提供了许多好处，如养分循环和杂草控制。本研究旨在确定覆盖作物组合在塞拉多地区免耕地区的生物量产量和养分积累及其对杂草抑制(生物量生产)的影响。试验设计为随机分组，6个处理，8个重复。处理包括五种覆盖作物混合和对照处理(休耕)。在Cerrado地区的免耕系统中，覆盖作物在播种后30、70和210天的三个评估期内有效地减少了杂草生物量。此外，我们得出结论，混合5(黑燕麦、荞麦、小米、Piatã草和Crotalaria ochroleuca)和4 (C. spectabilis、荞麦、珍珠小米和Crotalaria breviflora)在塞拉多条件下是最好的，因为它们在休耕地产生更多的生物量，这是由于土壤养分的可用性更高，此外，与休耕地相比，它们提供的杂草生物量更少。

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

Revista Caatinga AGRONOMY-

CiteScore

2.10

自引率

11.10%

发文量

审稿时长

6-12 weeks

期刊介绍： A Revista Caatinga é uma publicação científica que apresenta periodicidade trimestral, publicada pela Pró-Reitoria de Pesquisa e Pós-Graduação da Universidade Federal Rural do Semi-Árido – UFERSA, desde 1976. Objetiva proporcionar à comunidade científica, publicações de alto nível nas áreas de Ciências Agrárias e Recursos Naturais, disponibilizando, integral e gratuitamente, resultados relevantes das pesquisas publicadas.