Effect of a native bacterial consortium on growth, yield, and grain quality of durum wheat (Triticum turgidum L. subsp. durum) under different nitrogen rates in the Yaqui Valley, Mexico

A field experiment was carried out to quantify the effect of a native bacterial inoculant on the growth, yield, and quality of the wheat crop, under different nitrogen (N) fertilizer rates in two agricultural seasons. Wheat was sown under field conditions at the Experimental Technology Transfer Center (CETT-910), as a representative wheat crop area from the Yaqui Valley, Sonora México. The experiment was conducted using different doses of nitrogen (0, 130, and 250 kg N ha-1) and a bacterial consortium (BC) (Bacillus subtilis TSO9, B. cabrialesii subsp. tritici TSO2T, B. subtilis TSO22, B. paralicheniformis TRQ65, and Priestia megaterium TRQ8). Results showed that the agricultural season affected chlorophyll content, spike size, grains per spike, protein content, and whole meal yellowness. The highest chlorophyll and Normalized Difference Vegetation Index (NDVI) values, as well as lower canopy temperature values, were observed in treatments under the application of 130 and 250 kg N ha-1 (the conventional Nitrogen dose). Wheat quality parameters such as yellow berry, protein content, Sodium dodecyl sulfate (SDS)-Sedimentation, and whole meal yellowness were affected by the N dose. Moreover, the application of the native bacterial consortium, under 130 kg N ha-1, resulted in a higher spike length and grain number per spike, which led to a higher yield (+1.0 ton ha-1 vs. un-inoculated treatment), without compromising the quality of grains. In conclusion, the use of this bacterial consortium has the potential to significantly enhance wheat growth, yield, and quality while reducing the nitrogen fertilizer application, thereby offering a promising agro-biotechnological alternative for improving wheat production.

[Physical abuse: the profile of aggressor and child victim]

OBJECTIVE: To establish the profile of children who suffer abuse and of abuse perpetrators. METHODS: 225 cases of confirmed child-abuse in Curitiba, state of Paraná, were studied in 1998 based on information collected using a protocol. RESULTS: The following patterns were observed: 56% of the children were in school age; 59.6% were the first child of the couple; 84.4% were natural offspring; and 71.1% of the children had a satisfactory school record. Multiple injuries (38.2%) were found on the victimś bodies, mostly bruises (37.8%). The main aggressor was the mother (42.2%); 25.8% of them said that the reason for the violence was disciplining the child; 72% of the mothers denied the use of alcohol. CONCLUSION: Our results reveal that the children who are most affected by physical abuse are the first-borns of married couples, with age between 5 and 11 years; their schooling level is compatible with their age. Most violent acts are performed by the mother, who hits the child leaving bruises on several parts of the victimacute;s body, with the objective of educating, or setting limits to the child.