Combining Desulfurisation Gypsum and Polyacrylamide to Reduce Soil Salinity and Promote Buckwheat Photosynthesis

IF 3.7 2区 农林科学 Q1 AGRONOMY Journal of Agronomy and Crop Science Pub Date : 2024-07-10 DOI:10.1111/jac.12727
Wanghai Tao, Xue Zhao, Songrui Ning, Meiyue Ji, Quanjiu Wang
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Abstract

Soil salinisation poses a significant threat to global agricultural production and food security. China is among the countries most severely impacted by soil salinisation. To investigate the improvement technology for saline–alkali stress in buckwheat, a typical multigrain crop in northwest China, a coupling regulation study using desulfurisation gypsum and polyacrylamide (PAM) was conducted in 2019 and 2020. Desulfurisation gypsum was applied at 0, 5.5, 11, 16.5 and 22 kg·ha−1, while PAM was applied at 0, 15, 30, 45 and 60 kg·ha−1. The results demonstrated that applying 11 t·ha−1 desulfurisation gypsum and 30 kg·ha−1 PAM effectively reduces soil salinity and pH, averaging 81.79% and 6.07%, respectively. Furthermore, it did not cause soil heavy metal pollution and created the best soil environment for buckwheat growth. Among the models tested, the nonrectangular hyperbolic model was the most accurate in describing buckwheat's photosynthetic light response. The optimal treatment for achieving the best photosynthetic performance—measured by apparent quantum efficiency, maximum net photosynthetic rate, light compensation point, light saturation point, dark respiration rate, stomatal conductance, intercellular CO2 concentration, transpiration rate, leaf water use efficiency and yield—was achieved through applying 11 t·ha−1 desulfurisation gypsum and 30 kg·ha−1 PAM. Therefore, desulfurised gypsum and PAM should be applied at 11 t·ha−1 and 30 kg·ha−1, respectively, to improve buckwheat's adaptability to different light intensities while promoting its photosynthetic response in saline–alkali soils. This study provides an effective technical scheme for reducing salt and promoting the growth of crops under salinity stress, which is of great significance for improving salinity land in arid areas.

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结合脱硫石膏和聚丙烯酰胺降低土壤盐分并促进荞麦光合作用
土壤盐碱化对全球农业生产和粮食安全构成重大威胁。中国是受土壤盐碱化影响最严重的国家之一。为研究中国西北地区典型多粮作物荞麦的盐碱胁迫改良技术,2019 年和 2020 年开展了脱硫石膏与聚丙烯酰胺(PAM)的耦合调控研究。脱硫石膏的施用量分别为 0、5.5、11、16.5 和 22 kg-ha-1,聚丙烯酰胺的施用量分别为 0、15、30、45 和 60 kg-ha-1。结果表明,施用 11 t-ha-1 脱硫石膏和 30 kg-ha-1 PAM 能有效降低土壤盐分和 pH 值,平均降幅分别为 81.79% 和 6.07%。此外,它不会造成土壤重金属污染,为荞麦生长创造了最佳土壤环境。在测试的模型中,非矩形双曲线模型对荞麦光合光响应的描述最为准确。达到最佳光合作用性能的最佳处理方法是施用 11 吨/公顷的脱硫石膏和 30 公斤/公顷的 PAM,其测量指标包括表观量子效率、最大净光合速率、光补偿点、光饱和点、暗呼吸速率、气孔导度、细胞间 CO2 浓度、蒸腾速率、叶片水分利用效率和产量。因此,脱硫石膏和 PAM 的施用量应分别为 11 t-ha-1 和 30 kg-ha-1,以提高荞麦对不同光照强度的适应性,同时促进其在盐碱土中的光合响应。该研究为盐碱胁迫下作物减盐促长提供了有效的技术方案,对改善干旱地区盐碱地具有重要意义。
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来源期刊
Journal of Agronomy and Crop Science
Journal of Agronomy and Crop Science 农林科学-农艺学
CiteScore
8.20
自引率
5.70%
发文量
54
审稿时长
7.8 months
期刊介绍: The effects of stress on crop production of agricultural cultivated plants will grow to paramount importance in the 21st century, and the Journal of Agronomy and Crop Science aims to assist in understanding these challenges. In this context, stress refers to extreme conditions under which crops and forages grow. The journal publishes original papers and reviews on the general and special science of abiotic plant stress. Specific topics include: drought, including water-use efficiency, such as salinity, alkaline and acidic stress, extreme temperatures since heat, cold and chilling stress limit the cultivation of crops, flooding and oxidative stress, and means of restricting them. Special attention is on research which have the topic of narrowing the yield gap. The Journal will give preference to field research and studies on plant stress highlighting these subsections. Particular regard is given to application-oriented basic research and applied research. The application of the scientific principles of agricultural crop experimentation is an essential prerequisite for the publication. Studies based on field experiments must show that they have been repeated (at least three times) on the same organism or have been conducted on several different varieties.
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