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Crop and Pasture Science Crop and Pasture Science Society
Plant sciences, sustainable farming systems and food quality
Crop & Pasture Science

Crop & Pasture Science

Volume 75 Number 5 2024

CP23170Zinc interception and absorption in wheat spikes contribute significantly to grain zinc biofortification

Naiyue Hu, Zhiqiang Gao, Wanqing Zhang, Chenghang Du, Yinghua Zhang 0000-0002-1356-6084, Zhigan Zhao and Zhimin Wang 0000-0003-1325-2015

Understanding of interception, absorption and translocation of exogenous Zn in wheat is important to the goal of improving biofortification efficacy; however, knowledge gaps exist with regard to absorption and translocation of exogenous Zn by wheat and the role of spikes in biofortification. Results show that spikes are critical in intercepting and absorbing exogenous Zn, and translocation of exogenous Zn is dependent on application stage. The outcomes improve our knowledge of how wheat plants intercept, absorb and translocate Zn.

To ensure the continued existence of annual legume species in temperate regions, it is essential to understand the factors contributing to successful seed production; for instance, certain cultivars of French and yellow serradella occasionally flower at suboptimal times, potentially leading to reduced seed production. This study uncovered differences in how these cultivars produce flowers, pods and seeds. Some showed the ability to adapt to early flower loss, suggesting that selective breeding could improve seed yield resilience.

CP24043Forage accumulation and nutritive value in extensive, intensive, and integrated pasture-based beef cattle production systems

Rolando Pasquini Neto 0000-0001-6678-7131, Althieres José Furtado, Gabriele Voltareli da Silva, Annelise Aila Gomes Lobo, Adibe Luiz Abdalla Filho, Henrique Bauab Brunetti 0000-0002-0586-0304, Cristiam Bosi 0000-0001-8318-6477, André de Faria Pedroso, José Ricardo Macedo Pezzopane, Patrícia Perondi Anchão Oliveira 0000-0003-4665-3755 and Paulo Henrique Mazza Rodrigues

A challenge for livestock farmers is to improve production and nutritive value of forage grasses through management strategies. This study evaluated the impact of management on productive and nutritive traits of forages during two experimental years on five pasture-based production systems. More intensified systems with proper management allowed better characteristics than degraded pasture, ameliorating the effects of seasonality and improving tropical grasses in pasture-based livestock production systems.

CP23126Genomic prediction for targeted populations of environments in oat (Avena sativa)

Pablo Sandro, Madhav Bhatta, Alisha Bower, Sarah Carlson, Jean-Luc Jannink, David J. Waring 0000-0001-9971-9776, Clay Birkett, Kevin Smith, Jochum Wiersma, Melanie Caffe, Jonathan Kleinjan, Michael S. McMullen, Lydia English and Lucia Gutierrez 0000-0002-2957-3086

Rankings of genotypic performance may change from one environment to the next, creating genotype × environment interaction (GEI), which can impact genomic prediction and complicate identification of superior genotypes. We compared strategies for predicting the performance of individuals in the presence of GEI. The results provide useful tools for the optimisation of training populations and testing environments for the prediction of individuals in the targeted populations of environments.

CP23117Cropping calendar, agroclimatic and agroecological zoning for rainfed maize (Zea mays L.) under different rainfall scenarios in a semi-arid region of Brazil

Danilo Batista Nogueira, Alfredo Mendonça de Sousa, Alexsandro Oliveira da Silva 0000-0001-5528-9874, Bruno Ricardo Silva Costa, Rafaela da Silva Arruda and Fernando Ferrari Putti

This study aimed to define the optimum cropping calendar and the agroclimatic and agroecological zones for rainfed maize (Zea mays L.) across Ceará state, situated within the Brazilian semi-arid region, assuming different rainfall scenarios: dry, regular, and rainy. The agroclimatic zoning was defined trough the crop water balance results. Our findings demonstrated that rainfed maize cultivated under the semi-arid climate of Ceará state is viable in rainy conditions, partially restricted in regular years, and not recommended in dry years.

CP23125Evaluation of strategies to improve the quality of Tanzania grass (Megathyrsus maximum) silage with increasing levels of mata-pasto hay (Senna obtusifolia)

Rosane C. Rodrigues 0000-0001-8561-9678, Bruno Eduardo Caxias Miranda, Edson Mauro Santos, Francisco Naysson de Sousa Santos 0000-0001-6968-1738, Eduarda Castro Silva, Dilier Olivera-Viciedo, Anderson de Moura Zanine 0000-0003-0100-3652, Raphael Ramos Silva, Antonio Marcos da Penha Santos, Izakiel Reis Marinho and Maciel Costa Teixeira

The seasonality between the rainy and dry seasons is a challenge for tropical agriculture. This study evaluated different forms of ensiling Tanzania grass (Megathyrsus maximum) and forest pasture hay (FPH) aiming to improve the conservation and nutritional value of silages. Results showed that the use of 30% FPH improved the fermentative processes and the nutritional value of the silages. This strategy can reduce the negative impacts of weeds on pastures, although further research is needed for complementary additives.

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