College of Agriculture, Henan University of Science and Technology, Luoyang, Henan Province, China.
Henan Engineering Research Center of Human Settlements, Luoyang, Henan Province, China.
PeerJ. 2022 Feb 1;10:e12861. doi: 10.7717/peerj.12861. eCollection 2022.
Rainfed agriculture plays key role in ensuring food security and maintain ecological balance. Especially in developing areas, most grain food are produced rainfed agricultural ecosystem. Therefore, the increase of crop yields in rainfed agricultural ecosystem becomes vital as well as ensuring global food security.
The potential roles of arbuscular mycorrhizal fungi (AMF) in improving crop yields under rainfed condition were explored based on 546 pairs of observations published from 1950 to 2021.
AMF inoculation increased 23.0% crop yields based on 13 popular crops under rainfed condition. Not only was crop biomass of shoot and root increased 24.2% and 29.6% by AMF inocula, respectively but also seed number and pod/fruit number per plant were enhanced markedly. Further, the effect of AMF on crop yields depended on different crop groups. AMF improved more yield of N-fixing crops than non-N-fixing crops. The effect of AMF changed between grain and non-grain crops with the effect size of 0.216 and 0.352, respectively. AMF inoculation enhances stress resistance and photosynthesis of host crop in rainfed agriculture.
AMF increased crop yields by enhancing shoot biomass due to the improvement of plant nutrition, photosynthesis, and stress resistance in rainfed field. Our findings provide a new view for understanding the sustainable productivity in rainfed agroecosystem, which enriched the theory of AMF functional diversity. This study provided a theoretical and technical way for sustainable production under rainfed agriculture.
雨养农业在确保粮食安全和维持生态平衡方面发挥着关键作用。特别是在发展中地区，大多数粮食作物都是在雨养农业生态系统中生产的。因此，提高雨养农业生态系统中的作物产量至关重要，这也是确保全球粮食安全的关键。
本研究基于 1950 年至 2021 年发表的 546 对观测结果，探讨了丛枝菌根真菌（AMF）在雨养条件下提高作物产量的潜在作用。
AMF 接种可使 13 种主要作物在雨养条件下的产量提高 23.0%。AMF 接种不仅分别使地上部和地下部生物量增加了 24.2%和 29.6%，而且还显著增加了种子数量和每株植物的荚果/果实数量。此外，AMF 对作物产量的影响取决于不同的作物群体。AMF 对固氮作物的增产效果大于非固氮作物。AMF 对粮食作物和非粮食作物的影响不同，其效应大小分别为 0.216 和 0.352。AMF 接种可增强雨养农业中宿主作物的抗逆性和光合作用。
AMF 通过增强植物营养、光合作用和抗逆性来提高地上部生物量，从而提高作物产量。本研究为理解雨养农业生态系统的可持续生产力提供了新的视角，丰富了 AMF 功能多样性的理论。本研究为雨养农业的可持续生产提供了理论和技术途径。
