Evaluating the effects and benefits of cover crops in citrus orchards: a review

IF 1.1 Q3 AGRONOMY

South African Journal of Plant and Soil Pub Date : 2023-03-15 DOI:10.1080/02571862.2023.2236075

Sibongiseni Silwana, Azwimbavhi Reckson Mulidzi, Nebo Jovanovic

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Abstract

AbstractCover crops are used in sustainable agricultural practices to improve soil quality and minimise the effect of climate change, water restrictions and drought. The South African citrus industry produces and exports a diverse range of citrus fruits; however, knowledge of cover crops in citrus orchards in South Africa is limited. This review focuses mostly on evaluating cover crop selection, effects on the soil microbial community, weed control, citrus yield and fruit quality. In terms of cover crop selection, legumes seem to be preferred over non-legume cover crops. The reviewed literature reported that legume cover crops increased nitrogen by 67 to 209 kg N ha−1 through the nitrogen fixation process. Additionally, the cultivation of legume cover crops substantially improved the cost savings of nitrogen fertiliser. The fruit yield improved by 7.6 to 64%, while fruit quality improved by 2.3 to 12.4% fruit weight and 2.4 to 5.8% Bx. This demonstrates that the benefits of cover crops to South African citrus growers include improved soil quality and fruit yields and decreased costs.Keywords: fruit yieldlegumesnitrogen fixationorganic carbonorganic mattersoil microbial communitySouth Africatree shading

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柑桔园覆盖作物的效益评价综述

覆盖物作物被用于可持续农业实践，以改善土壤质量并最大限度地减少气候变化、水资源限制和干旱的影响。南非柑橘产业生产和出口各种柑橘类水果;然而，对南非柑橘果园覆盖作物的了解有限。本文主要从覆盖作物的选择、对土壤微生物群落的影响、杂草控制、柑橘产量和果实品质等方面进行综述。在覆盖作物选择方面，豆类似乎比非豆类覆盖作物更受青睐。据文献报道，豆科覆盖作物通过固氮过程增加氮素67 ~ 209 kg N ha - 1。此外，豆科覆盖作物的种植大大提高了氮肥的成本节约。果实产量提高7.6 ~ 64%，果实品质提高2.3 ~ 12.4%，单果重提高2.4 ~ 5.8%。这表明覆盖作物对南非柑橘种植者的好处包括改善土壤质量和水果产量以及降低成本。关键词:果实产量豆科植物固氮有机碳有机质土壤微生物群落南非树木遮荫

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来源期刊

South African Journal of Plant and Soil Agricultural and Biological Sciences-Plant Science

CiteScore

1.90

自引率

11.10%

发文量

期刊介绍： The Journal has a proud history of publishing quality papers in the fields of applied plant and soil sciences and has, since its inception, recorded a vast body of scientific information with particular reference to South Africa.