ABSTRACT

Microbial soil additives and plant biostimulants contain substances and microorganisms that can enhance stress tolerance in plants and increase the yield and quality of the crop. The interest in such inputs for sustainable and agroecological farming systems has led to the development of a range of products. The aim of the study was to determine the effects of some microbial soil additives (MSADs), plant growth promoters (PGPs) and biological control agents (BCAs) on photosynthetic efficiency, canopy vegetation indices and yield of common buckwheat (Fagopyrum esculentum Moench), an under-utilised nutraceutical crop. The study showed that soaking the seeds in the BCAs Pythium oligandrum and Bacillus subtilis, on their own, had significant effects on the yield of the buckwheat. Increases in chlorophyll a fluorescence indices were observed in plants grown from seeds soaked in a solution containing P. oligandrum (ET₀/RC) and also in soil treated with the MSAD UG Max (ABS/RC, TR₀/RC). Treatment with either of the two MSADs also increased the normalised differential vegetation index (NDVI). Soaking the seeds in PGPs combined with BCAs affected only the chlorophyll a fluorescence parameters, whereas the combined treatment of spraying the plants with PGPs and treating the soil with MSADs affected not only the chlorophyll a fluorescence parameters (F_V/F_M, ET₀/RC, DI₀/RC), but also indicated a tendency for a decrease in the leaf area index (LAI) (p = 0.058) and the NDVI (p = 0.186). The correlations between grain yield, chlorophyll a fluorescence parameters and vegetation indices of the canopy were discussed.

摘要

微生物土壤添加剂和植物生物刺激素含有能增强植物抗逆性和提高作物产量和品质的物质和微生物。对可持续和农业生态农业系统的此类投入的兴趣导致了一系列产品的开发。该研究的目的是确定一些微生物土壤添加剂 (MSADs)、植物生长促进剂 (PGPs) 和生物防治剂 (BCAs) 对普通荞麦 ( Fagopyrum esculentum Moench)光合效率、冠层植被指数和产量的影响，一种未充分利用的营养作物。研究表明，将种子浸泡在 BCA 中的Pythium oligandrum和Bacillus subtilis，就其本身而言，对荞麦的产量有显着影响。在从浸泡在含P. oligandrum (ET ₀ /RC)的溶液中的种子生长的植物中以及在用 MSAD UG Max (ABS/RC, TR ₀ /RC)处理的土壤中观察到叶绿素a荧光指数的增加。用两种 MSAD 中的任何一种处理也增加了归一化差异植被指数 (NDVI)。将种子浸泡在 PGPs 与 BCAs 结合仅影响叶绿素a荧光参数，而用 PGPs 喷洒植物和用 MSADs 处理土壤的联合处理不仅影响叶绿素a荧光参数（F _V / F _M, ET ₀ /RC, DI ₀ /RC)，但也表明叶面积指数 (LAI) ( p = 0.058) 和 NDVI ( p = 0.186) 呈下降趋势。讨论了粮食产量、叶绿素a荧光参数和冠层植被指数之间的相关性。