Biomass, gas exchange, and nutrient contents in upland rice plants affected by application forms of microorganism growth promoters

Abstract

Microorganisms are considered a genetic resource with great potential for achieving sustainable development of agricultural areas. The objective of this research was to determine the effect of microorganism application forms on the production of biomass, gas exchange, and nutrient content in upland rice. The experiment was conducted under greenhouse conditions in a completely randomized design in a factorial 7 × 3 + 1, with four replications. The treatments consisted of combining seven microorganisms with three application forms (microbiolized seed; microbiolized seed + soil drenched with a microorganism suspension at 7 and 15 days after sowing (DAS); and microbiolized seed + plant sprayed with a microorganism suspension at 7 and 15 DAS) and a control (water). Treatments with Serratia sp. (BRM32114), Bacillus sp. (BRM32110 and BRM32109), and Trichoderma asperellum pool provided, on average, the highest photosynthetic rate values and dry matter biomass of rice shoots. Plants treated with Burkolderia sp. (BRM32113), Serratia sp. (BRM32114), and Pseudomonas sp. (BRM32111 and BRM32112) led to the greatest nutrient uptake by rice shoots. Serratia sp. (BRM 32114) was the most effective for promoting an increase in the photosynthetic rate, and for the greatest accumulation of nutrients and dry matter at 84 DAS, in rice shoots, which differed from the control treatment. The use of microorganisms can bring numerous benefits of rice, such as improving physiological characteristics, nutrient uptake, biomass production, and grain yield.

Light and plant growth‐promoting rhizobacteria effects on Brachiaria brizantha growth and phenotypic plasticity to shade

“…have attested their growth-promoting potential in rice Rêgo, Borges, Filippi, Gonc ßalves, & Silva, 2014) and Brachiaria brizantha (Lopes et al, unpublished). These rhizobacteria are known to increase the auxin synthesis, nutrient uptake (e.g., nitrogen, phosphorus and iron), chlorophyll content, photosynthetic rate and biomass production (Ahemad & Kibret, 2014;Nascente et al, 2016).…”

Effect of <i>Pseudomonas fluorescens</i> and <i>Burkholderia pyrrocinia</i> on the Growth Improvement and Physiological Responses in <i>Brachiaria brizantha</i>

“…These improved responses might have contributed to the increased relative growth rate and biomass production measured on those plants. The positive effect of plant growth-promotion rhizobacteria on net photosynthetic is also reported in rice [19].…”

Épocas de semeadura afetando índices morfofisiológicos de cultivares de arroz de terras altas

“…Também se coletaram as variáveis climáticas radiação solar global e temperaturas do ar máxima (Tmax) e 1 Introdução O arroz de terras altas é cultivado na Ásia, África e Américas, correspondendo a 12% da produção global de arroz (FAO, 2017). A cultura nesse ambiente tem crescido em importância por causa da diminuição da disponibilidade de água para o cultivo do arroz irrigado (Bouman et al, 2005;Crusciol et al, 2013a;Nascente et al, 2017).…”