叶面生物刺激剂、脯氨酸和钾营养缓解盐胁迫对大蒜植株生长和产量品质有促进作用

Eman F. A. Awad-Allah, M. Attia, A. Mahdy
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引用次数: 6

摘要

在世界上许多农业地区,土壤盐分是作物生产的主要限制因素之一。除了在田间规模上采取有效的管理措施减少有效根区盐的积累外,有效利用处理措施减轻盐胁迫的影响,提高作物的耐盐性,是在这种不利条件下保证作物产量的一个有希望的解决方案。通过田间试验,研究了在中等盐渍土条件下,叶面喷施植物性生物刺激素(即加或不加3%酵母提取物)、3种水平脯氨酸(0、25和50 mM)以及配施硫酸钾、48% K2O(0、50和100 kg/次)对大蒜生长促进、叶片化学成分、球茎质量参数以及产量及其成分的影响。结果表明,叶面喷施3%酵母浸膏和50 mM脯氨酸配合适宜钾量(100 kg/次)的交互作用显著。从种植时间、总产量/采食量算起135 d后,对提高大蒜的营养生长参数(株高、单株叶数、叶片中N、P、K、S、Ca、Mg等矿物质含量)和叶片脯氨酸含量效果最好。、收获期大蒜产量品质参数。综上所述,在大蒜生长季适当施钾量的情况下,酵母浸膏和脯氨酸等抗逆性化合物可缓解盐胁迫的不利影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Salinity Stress Alleviation by Foliar Bio-Stimulant, Proline and Potassium Nutrition Promotes Growth and Yield Quality of Garlic Plant
Soil salinity is one of the major yield-limiting factors for crop production in many agricultural regions all over the world. Besides following efficient management practices at the field scale to reduce accumulation of salts in the effective root-zone, the effective use of treatments to alleviate the effects of salinity stress and improve crop salt tolerance is a promising solution to ensure crop production in such adverse conditions. A field experiment was carried out to investigate the effect of foliar spray with plant-based biostimulant (i.e. with and/or without 3% yeast extract), three levels of proline (0, 25, and 50 mM), and combined with potassium fertilizers, as potassium sulfate, 48% K2O (0, 50, and 100 kg/fed.) on growth promotion, chemical composition of garlic leaves, bulb quality parameters as well as yield and its components of garlic plant grown under moderate saline soil. Results revealed that the interaction between foliar spray with yeast extract at 3% and proline at 50 mM combined with proper K level at 100 kg/fed., was the best interaction treatment for increasing vegetative growth parameters, i.e. plant height, number of leaves per plant, and mineral contents (N, P, K, S, Ca and Mg in leaves), and proline content of garlic leaves after 135 days from planting time, total yield/fed., and garlic yield quality parameters at harvesting time. In conclusion, the detrimental effects of salinity stress can be alleviated by stress tolerance-inducing compounds, such as yeast extract and proline with proper application rate of K fertilization during the growing season of garlic crop.
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