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首页> 外文期刊>Plant and Soil >Potassium nutrition effects on seed alkaloid concentrations, yield and mineral content of lupins (Lupinus angustifolius)
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Potassium nutrition effects on seed alkaloid concentrations, yield and mineral content of lupins (Lupinus angustifolius)

机译：钾营养对羽扇豆种子生物碱浓度，产量和矿物质含量的影响

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摘要

To ensure that narrow-leafed lupin (Lupinus angustifolius L.) meets feed quality standards, the concentration of alkaloids must be kept under the maximum acceptable limit of 200 mg kg−1 DM. One of the factors that may affect seed alkaloid concentration is soil nutrient deficiency. In this paper, we report the results of glasshouse and field experiments that tested the effect of potassium (K) deficiency on seed alkaloid concentrations. In the glasshouse, seed alkaloid concentrations increased by 385, 400 and 205% under severe K deficiency in sweet varieties (Danja, Gungurru and Yorrel, respectively) of L. angustifolius. The concentration of alkaloids in Fest, the bitter variety, was always high regardless of soil K status. At all levels of applied K (0–240 mg kg−1 soil), lupanine was the predominant alkaloid in sweet varieties, whereas 13-hydroxylupanine prevailed in the bitter variety. Seed yield of all varieties increased exponentially with increasing amounts of applied K, reaching a maximum at 60 mg K kg−1 soil. In the field, application of K to deficient soils decreased seed alkaloid concentration at Badgingarra, Western Australia (WA) but not at Nyabing, WA, in 1996. In both field trials, seed yield and mineral content were not affected by the amounts of K fertiliser applied. These findings highlighted the need for adequate K fertilisation of deficient soils in WA to avoid the risk of producing low quality lupin seed with high alkaloid concentrations. K deficiency is involved in stimulating alkaloid production in sweet varieties of L. angustifolius.
机译：为确保窄叶羽扇豆（Lupinus angustifolius L.）符合饲料质量标准，必须将生物碱的浓度保持在200 mg kg-1 DM的最大可接受限度内。可能影响种子生物碱浓度的因素之一是土壤养分缺乏。在本文中，我们报告了温室和田间试验的结果，这些试验测试了钾（K）缺乏对种子生物碱浓度的影响。在温室中，在甜钾品种（分别为Danja，Gungurru和Yorrel）的L. angustifolius严重缺钾的情况下，种子生物碱浓度分别增加了385、400和205％。无论土壤钾状况如何，苦味繁多的Fest中生物碱的浓度始终很高。在所有施钾水平下（0–240 mg kg-1 土壤），甜瓜品种中的生物碱主要是卢帕宁，而苦瓜品种中的主要成分是13-羟基鲁潘宁。所有品种的种子产量都随着施钾量的增加而呈指数增长，在60 mg K kg-1 土壤中达到最大值。在田间，1996年在不足的土壤上施钾降低了西澳大利亚州Badgingarra（WA）的种子生物碱浓度，但在西澳州Nyabing却没有。施肥。这些发现强调了西澳大利亚州贫瘠土壤需要适当的钾肥施用，以避免产生高生物碱浓度的低质量羽扇豆种子的风险。缺钾参与了甜橙L. angustifolius的生物碱生产的刺激。

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