莴苣(Lactuca sativa L.)的反应不同灌溉制度下复垦沙质土壤植物对生物刺激物的反应

B. Rashwan, Reham Elsaied
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引用次数: 0

摘要

该研究于2020/2021年和2021/2022年连续两个季节的冬季在埃及El- Minia省西部地区开垦的沙质土壤的私人农场进行。为研究不同灌溉方式、生物刺激素及其相互作用对生菜生长、产量和化学成分的影响,采用分畦设计,以灌溉处理为主(100%作物蒸散量、80%等和60%等),生物刺激素(对照、腐植酸钾(K-H)、生物肥料(EM)和K-H + EM混合)分配在小畦。结果表明,在大多数情况下,100%和80% ETc之间的影响显著高于60% ETc,而100%和80% ETc之间的影响不显著。此外,与对照相比,施用生物刺激素减少了水分亏缺的负面影响。钾肥和EM联合处理对植物生长和产量的所有估计参数均有显著提高。此外,增加生菜叶片中矿物质、蛋白质和碳水化合物的含量。与对照相比,硝态氮和脯氨酸在两个季节分别显著降低(23.20%、0.18.38%和18.18%、14.33%)。需水量越少,灌溉用水效率越高(60%等)。两种生物刺激素的结合使灌溉用水效率第一季度显著提高58.60%,第二季显著提高59.14%。土壤速效氮、磷、钾在施用生物刺激剂后再单独施用显著增加。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Response of Lettuce (Lactuca sativa L.) Plant to Bio-stimulants Under Various Irrigation Regimes in Reclaimed Sandy Soil
he study conducted at private farm in reclaimed sandy soils in the western district of, El- Minia Governorate, Egypt during winter of two successive seasons of 2020/2021, 2021/2022. To investigate the influences of different irrigation regimes, bio-stimulants and their interaction on lettuce growth, yield and chemical composition, A split-plot design was used, the main plot was irrigation treatments (100% of crop evapotranspiration, 80% ETc and 60% ETc), while the bio-stimulants (control, potassium humate (K-H), biofertilizers (EM) and mixture from K-H plus EM) were assigned in sub-plot. The results showed that in most aspects there was a significant affect between 100% or 80% ETc compared to 60% ETc but insignificant between 100% ETc and 80% ETc in both seasons. Moreover, soil application of the biostimulants reduced the negative impact of water deficit compared to control. Combined K-H and EM caused significant increase in all estimated parameters for plant growth and yield. In addition, increase mineral contents, protein and carbohydrate contents in lettuce leaves. In opposite, it causing significant decrease by (23.20, .18.38 and 18.18, 14.33%) for nitrate and proline through both seasons respectively, compared with control. Furthermore, the highest irrigation water use efficiency was recorded with decreasing the required amount of water (60% ETc). Integration both bio-stimulants caused significant increase in irrigation water use efficiency by 58.60 %in the first season and were 59.14% in the second season. Available N, P and K in soil significantly increase with application of mixture of bio-stimulants followed by sole application of K-H.
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