利用木薯废水作为钾源生产卷心菜

J. Torres, D. M. S. Vieira, Antônio C. Barreto, H. C. D. O. Charlo, A. Loss, R. T. Thuler, R. Camargo, E. Lemes
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摘要

摘要 木薯废水(CWW)是一种天然生物肥料,作为钾源已成功应用于长周期作物,但在短周期作物中仍需进行更好的评估。本研究旨在评估 CWW 作为钾源对卷心菜生长、产量和理化质量的影响。研究在温室中进行,采用 5 × 2 + 1 的随机区组设计,共设四个重复。作为钾的唯一来源,对五种 CWW 剂量进行了评估:0、60、120、180 和 240 千克/公顷 K2O;两种施用形式:1-播种时施用总剂量:2-播种时施用 50%的剂量+50%的剂量进行表层施肥,以及一种额外的处理:100%矿物肥料,K2O剂量为120千克/公顷,以氯化钾为来源。对莴苣的叶片数(NL)、株高(PH)、鲜重(FM)、干重(DM)、水分(MO)、灰分(ASH)、纤维(FB)、脂质(LIP)、蛋白质(PTN)和碳水化合物(CHO)含量进行了评估。仅施用 CWW 肥料时,莴苣的所有农艺属性值均低于矿质肥料。与施用矿物质肥料相比,只施用 CWW 肥料的莴苣(根据施肥总量或分次施肥及剂量而定)的 ASH、FB、LIP、PTN 和 CHO 含量较高,分别达到 4.05%、3.97%、1.75%、7.11% 和 3.63%。在莴苣栽培中,CWW 可作为一种补充钾源,因为仅使用 CWW 并不能取代传统的矿质肥料。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Curly lettuce production using cassava wastewater as a potassium source
ABSTRACT Cassava wastewater (CWW) is a natural biofertilizer successfully tested as a source of K in long-cycle crops; however, it still needs to be better evaluated in short-cycle crops. This study aimed to evaluate the use of CWW as a source of K in the growth, yield, and physicochemical quality of curly lettuce. The study was conducted in a greenhouse, in a randomized block design arranged in a 5 × 2 + 1 factorial scheme, with four replicates. Five CWW doses were evaluated as an exclusive source of K: 0, 60, 120, 180, and 240 kg ha-1 of K2O; two forms of application: 1-total dose at planting: 2-application of 50% of the dose at planting + 50% of the dose in topdressing, and an additional treatment: 100% mineral fertilization at 120 kg ha-1 of K2O dose, using KCl as the source. The number of leaves (NL), plant height (PH), fresh mass (FM), dry mass (DM), moisture (MO), ashes (ASH), fibers (FB), lipids (LIP), proteins (PTN), and carbohydrates (CHO) contents were evaluated. All agronomic attributes of lettuce showed lower values when fertilized only with CWW than mineral fertilization. Lettuce fertilized only with CWW, depending on total or split application and dose, showed higher ASH, FB, LIP, PTN, and CHO contents reaching 4.05, 3.97, 1.75, 7.11, and 3.63%, respectively, compared to mineral fertilization. The CWW can potentially be used as a complementary K source in lettuce cultivation, as its exclusive use does not replace traditional mineral fertilization.
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