蛭石堆肥和丛枝菌根真菌提高盐碱地玉米生物量的关键因素是嫩枝 K/Na 比率

IF 3.4 3区 农林科学 Q2 ENVIRONMENTAL SCIENCES
Baoru Sun, Zhiyi Li, Chong Wang
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引用次数: 0

摘要

研究在盐碱地施用蛭石堆肥和丛枝菌根真菌(AMF)后,土壤理化性质、植物激素和抗氧化酶对玉米生物量产生的关系和相对贡献。我们采用随机完全区组设计进行了一项温室试验,在玉米生长过程中添加了蛭肥和 AMF 的因子组合。施用蛭石堆肥和 AMF 后,土壤大颗粒增加了 14% 至 48%,盐浓度降低了 12% 至 34%,可利用磷增加了 15% 至 59%,铵-氮浓度增加了 26% 至 40%。因此,嫩枝的 K/Na 比率增加了 43% 至 261%,植物氮和磷的浓度以及生物量也随之增加。在盐浓度和养分供应量提高的同时,芽的吲哚-3-乙酸浓度增加了 20% 至 28%,芽的过氧化氢酶活性降低了 12% 至 48%,从而促进了养分吸收和生物量的增加。生物量的增加主要归因于嫩枝的 K/Na 比率和过氧化氢酶活性,分别增加了 54.4% 和 9.7%。施用蛭肥和AMF对土壤理化改良和植物内源生理调控的协同效应有效提高了盐碱地中玉米的生物量,其中嫩枝K/Na是生物量提高的关键驱动因素,这一机制值得考虑作为提高盐胁迫下植物耐盐性和生物量生产的重要目标。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Shoot K/Na Ratio is the Key Factor for Vermicompost and Arbuscular Mycorrhizal Fungi to Improve Maize Biomass in Saline-Alkali Soil

Shoot K/Na Ratio is the Key Factor for Vermicompost and Arbuscular Mycorrhizal Fungi to Improve Maize Biomass in Saline-Alkali Soil

To investigate the relationships and relative contributions of soil physical and chemical properties, and plant hormones and antioxidant enzymes to maize biomass production with the application of vermicompost and arbuscular mycorrhizal fungi (AMF) in saline-alkali soil. A greenhouse experiment was conducted in a randomized complete block design with maize grown with factorial combinations of plus and minus vermicompost and AMF additions. With the application of vermicompost and AMF, soil macroaggregates increased by 14 to 48%, salt concentration decreased by 12 to 34%, available phosphorus increased by 15 to 59%, and ammonium-N concentration increased by 26 to 40%. In response the shoot K/Na ratio increased by 43 to 261%, with consequent increases in plant nitrogen and phosphorus concentrations, and biomass. The improvements in salt concentration and nutrient availability were paralleled by shoot indole-3-acetic acid concentration increasing by 20 to 28% and shoot catalase activity decreasing by 12 to 48%, which facilitated the increase in nutrient uptake and biomass. The increased biomass was mostly attributed to shoot K/Na ratio and catalase activity, by 54.4% and 9.7%, respectively. The synergistic effects of soil physical and chemical amelioration, and plant endogenously physiological regulation with vermicompost and AMF application effectively improved maize biomass in saline-alkali soil, with shoot K/Na being the key driver of biomass enhancement, and this mechanism merits consideration as an important target to improve plant salinity tolerance and biomass production under salt stress.

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来源期刊
Journal of Soil Science and Plant Nutrition
Journal of Soil Science and Plant Nutrition Agricultural and Biological Sciences-Soil Science
CiteScore
5.90
自引率
10.30%
发文量
331
审稿时长
9 months
期刊介绍: The Journal of Soil Science and Plant Nutrition is an international, peer reviewed journal devoted to publishing original research findings in the areas of soil science, plant nutrition, agriculture and environmental science. Soil sciences submissions may cover physics, chemistry, biology, microbiology, mineralogy, ecology, pedology, soil classification and amelioration. Plant nutrition and agriculture submissions may include plant production, physiology and metabolism of plants, plant ecology, diversity and sustainability of agricultural systems, organic and inorganic fertilization in relation to their impact on yields, quality of plants and ecological systems, and agroecosystems studies. Submissions covering soil degradation, environmental pollution, nature conservation, and environmental protection are also welcome. The journal considers for publication original research articles, technical notes, short communication, and reviews (both voluntary and by invitation), and letters to the editor.
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