Department of Biology, College of Science, Qassim University, Burydah, 52571, Saudi Arabia.
Department of Biology, College of Science, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia.
BMC Plant Biol. 2024 Mar 15;24(1):191. doi: 10.1186/s12870-024-04863-6.
Enriching the soil with organic matter such as humic and fulvic acid to increase its content available nutrients, improves the chemical properties of the soil and increases plant growth as well as grain yield. In this study, we conducted a field experiment using humic acid (HA), fulvic acid (FA) and recommended dose (RDP) of phosphorus fertilizer to treat Hordeum vulgare seedling, in which four concentrations from HA, FA and RDP (0.0 %, 50 %, 75 % and 100%) under saline soil conditions . Moreover, some agronomic traits (e.g. grain yield, straw yield, spikes weight, plant height, spike length and spike weight) in barley seedling after treated with different concentrations from HA, FA and RDP were determined. As such the beneficial effects of these combinations to improve plant growth, N, P, and K uptake, grain yield, and its components under salinity stress were assessed.
The findings showed that the treatments HA + 100% RDP (T1), HA + 75% RDP (T2), FA + 100% RDP (T5), HA + 50% RDP (T3), and FA + 75% RDP (T6), improved number of spikes/plant, 1000-grain weight, grain yield/ha, harvest index, the amount of uptake of nitrogen (N), phosphorous (P) and potassium (K) in straw and grain. The increase for grain yield over the control was 64.69, 56.77, 49.83, 49.17, and 44.22% in the first season, and 64.08, 56.63, 49.19, 48.87, and 43.69% in the second season,. Meanwhile, the increase for grain yield when compared to the recommended dose was 22.30, 16.42, 11.27, 10.78, and 7.11% in the first season, and 22.17, 16.63, 11.08, 10.84, and 6.99% in the second season. Therefore, under salinity conditions the best results were obtained when, in addition to phosphate fertilizer, the soil was treated with humic acid or foliar application the plants with fulvic acid under one of the following treatments: HA + 100% RDP (T1), HA + 75% RDP (T2), FA + 100% RDP (T5), HA + 50% RDP (T3), and FA + 75% RDP (T6).
The result of the use of organic amendments was an increase in the tolerance of barley plant to salinity stress, which was evident from the improvement in the different traits that occurred after the treatment using treatments that included organic amendments (humic acid or fulvic acid).
在土壤中添加腐殖酸和富里酸等有机物来增加其有效养分含量，改善土壤的化学性质，从而促进植物生长和提高粮食产量。在本研究中，我们在盐渍土壤条件下，使用腐殖酸（HA）、富里酸（FA）和推荐剂量（RDP）的磷肥对大麦幼苗进行了田间试验，其中 HA、FA 和 RDP 的四个浓度（0.0%、50%、75%和 100%）。此外，还测定了不同浓度的 HA、FA 和 RDP 处理后大麦幼苗的一些农艺性状（如籽粒产量、秸秆产量、穗重、株高、穗长和穗重）。因此，评估了这些组合在盐胁迫下对提高植物生长、氮、磷、钾吸收、籽粒产量及其组成的有益效果。
研究结果表明，HA+100%RDP（T1）、HA+75%RDP（T2）、FA+100%RDP（T5）、HA+50%RDP（T3）和 FA+75%RDP（T6）等处理方式提高了每株穗数、千粒重、公顷产量、收获指数、氮（N）、磷（P）和钾（K）在秸秆和籽粒中的吸收量。第一季的产量比对照增加了 64.69%、56.77%、49.83%、49.17%和 44.22%，第二季增加了 64.08%、56.63%、49.19%、48.87%和 43.69%。同时，与推荐剂量相比，第一季的产量增加了 22.30%、16.42%、11.27%、10.78%和 7.11%，第二季增加了 22.17%、16.63%、11.08%、10.84%和 6.99%。因此，在盐胁迫条件下，除磷肥外，土壤中添加腐殖酸或叶面喷施富里酸，再加上以下处理之一，可获得最佳效果：HA+100%RDP（T1）、HA+75%RDP（T2）、FA+100%RDP（T5）、HA+50%RDP（T3）和 FA+75%RDP（T6）。
使用有机改良剂的结果是提高了大麦植物对盐胁迫的耐受性，这从使用包含有机改良剂（腐殖酸或富里酸）的处理后发生的不同性状的改善中可以明显看出。
