Ingeniería Agronómica, Universidad Politécnica de Cartagena, Cartagena, Spain.
Recursos fitogenéticos, Instituto de Biotecnología Vegetal, Edificio I + D + i, Cartagena, Spain.
J Sci Food Agric. 2022 Dec;102(15):7353-7362. doi: 10.1002/jsfa.12102. Epub 2022 Jul 28.
Soil fertility is a major concern during vegetable production. Conventional versus organic fertilization has been studied in order to conserve soil properties. While some reports point out an increase in food nutritional properties, the loss of crop yield under organic conditions continues to be a problem. Thus, an experiment with broccoli in the field was carried out, comparing crop management under conventional fertilization (CF) and two soil amendment treatments: manure pellet (M) and an enriched-biochar (EB) supplemented by an organic fertilizer (AND) applied alone (M + CF; EB+AND) or in combination (M + EB + AND). Crop yield and the nutritional properties in the flowering heads (mineral content, phenolic compounds and glucosinolates (GSLs)), were determined.
Enriched-biochar and manure as a standalone amendment resulted in higher crop yield regarding CF, but not when they were applied in combination. The number of flowering heads with no-commercial characteristics was lower after enriched-biochar soil application. Finally, enriched-biochar treatment enhanced NO , PO and SO levels in the flowering heads, and some of the ion contents can be associated with mineral changes in the soil after the biochar amendment. Also, the contents of phenolic compounds and indole GSLs were higher after enriched-biochar application compared with the other treatments, GSL increase being due to the higher percentage of sulfur in the plant rather that an adequate N/S ratio.
Application of enriched-biochar amendment in the cultivation of broccoli is appropriate, since there are no losses of yield and an increase in nutritional compounds in the flowering heads. © 2022 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
土壤肥力是蔬菜生产中的一个主要关注点。为了保护土壤特性，已经对常规施肥与有机施肥进行了研究。虽然一些报告指出食物营养特性有所提高，但有机条件下作物产量的损失仍然是一个问题。因此，在田间进行了西兰花试验，比较了常规施肥（CF）下的作物管理和两种土壤改良处理：粪肥球（M）和富生物质炭（EB），并辅以有机肥（AND）单独施用（M+CF；EB+AND）或组合施用（M+EB+AND）。测定了作物产量和开花头中的营养特性（矿物质含量、酚类化合物和硫代葡萄糖苷（GSLs））。
富生物质炭和粪肥作为单独的改良剂，与 CF 相比，作物产量更高，但组合施用时则不然。富生物质炭土壤施用后，无商业特征的开花头数量减少。最后，富生物质炭处理提高了开花头中的 NO 、PO 和 SO 水平，一些离子含量可与生物炭改良后土壤中的矿物质变化相关。此外，与其他处理相比，富生物质炭处理后酚类化合物和吲哚 GSLs 的含量更高，GSL 增加是由于植物中硫的百分比较高，而不是氮/硫比适宜。
在西兰花的种植中应用富生物质炭改良剂是合适的，因为产量没有损失，而且开花头中的营养化合物增加。© 2022 作者。John Wiley & Sons Ltd 代表化学工业协会出版的《食品科学杂志》。
