The fatty acid profile of oilseed (Brassica carinata A. Braun) has prompted interest as a renewable fuel feedstock due to the high proportions of erucic acid (C22:1) in its seed. In addition, B. carinata produces sulfur (S)-rich secondary metabolites called glucosinolates (GSLs) that protect the plant from pests and disease but it could also reduce the palatability and nutritional value of animal feed when the seed meal is used as a protein supplement. In B. carinata, it is not clear how S availability could be used to reduce total GSL content (TGC) or its possible effects on yield or oil productivity and quality. In this study, we evaluated the effects of S fertility on seed yield and components important to meal quality like TGC, crude protein content (CPC), and factors affecting oil quality including total oil content (TOC) and erucic acid content (EAC). We compared three B. carinata genotypes with varying seed TGC and one low GSL, B. napus L., grown under a semicontrolled greenhouse environment. A 2-yr study found that increasing S fertility of deficient plants increased seed yield, TGC, EAC, and CPC without significantly affecting TOC. Seed TGC can be reduced by limiting S but with some potential for yield penalties. Only ‘Avanza 641’ and ‘AAC A120’ produced seed at the 0% S rate, indicating an increased efficiency for S acquisition compared with other genotypes. This study shows that S requirements may be similar between oilseed Brassica regardless of seed GSLs, that limiting S can reduce TGC but to the detriment of seed yield, and a positive relationship between TGC to EAC, providing an opportunity for improving oil quality.

中文翻译：

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硫肥对油菜油菜籽产量和种子成分的影响

由于其种子中芥酸 (C22:1) 的比例很高，油籽 ( Brassica carinata A. Braun)的脂肪酸特征引起了人们作为可再生燃料原料的兴趣。此外，B. carinata产生富含硫 (S) 的次生代谢物，称为硫代葡萄糖苷 (GSL)，可保护植物免受病虫害，但当种子粉用作蛋白质时，它也会降低动物饲料的适口性和营养价值补充。在B. carinata，尚不清楚 S 可用性如何用于降低总 GSL 含量 (TGC) 或其对产量或油产量和质量的可能影响。在本研究中，我们评估了 S 肥力对种子产量和对膳食质量重要的成分（如 TGC、粗蛋白含量 (CPC)）以及影响油质的因素（包括总油含量 (TOC) 和芥酸含量 (EAC)）的影响。我们比较了三种具有不同种子 TGC 的B. carinata基因型和一种低 GSL、B. napusL.，在半控制的温室环境下生长。一项为期 2 年的研究发现，增加缺陷植物的 S 肥力会增加种子产量、TGC、EAC 和 CPC，但不会显着影响 TOC。可以通过限制 S 来降低种子 TGC，但可能会降低产量。只有 'Avanza 641' 和 'AAC A120' 以 0% 的 S 率产生种子，表明与其他基因型相比，S 获取效率提高。该研究表明，无论种子 GSL 如何，油籽芸苔对 S 的需求量可能相似，限制 S 可以降低 TGC 但不利于种子产量，并且 TGC 与 EAC 之间存在正相关关系，为改善油质提供了机会。