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Tifway 419 Bermudagrass is widely used on athletic fields, requiring irrigation and fertilization for its maintenance; however, little information is available for Bermudagrass management in tropical countries, as Brazil. Thus, this study aimed to evaluate the effect of irrigation frequency and nitrogen (N) fertilization on the development of Tifway 419 Bermudagrass. The experiment was carried in 2019, applying two irrigation frequencies (daily and every two days) and five N concentrations of 0, 42.19, 63.28, 105.47 and 126.56 kg N ha-1 divided into three 30-day increments. Photosynthetic pigments, grass height, accumulated dry mass, relative chlorophyll index, regeneration rate, root length, and dry mass of root, rhizome and stolon were analyzed. The best result was observed in between 63.28 and 105.47 kg N ha-1 (15% N) and irrigated every two days. The treatment maintains the green color of the grass. Maximum Bermudagrass regeneration rate was observed within this interval, and the root length and dry mass of roots, rhizomes and stolons were higher compared to the highest concentration.

Submitted by Patrick Luan Ferreira dos Santos (patricklfsantos@gmail.com) on 2022-09-30T13:13:43Z No. of bitstreams: 1 MANEJO DA IRRIGAÇÃO E DOSES DE NITROGÊNIO NO DESENVOLVIMENTO, QUALIDADE ESTÉTICA E JOGABILIDADE EM GRAMADO DE ‘TIFTON 419’.pdf: 73782677 bytes, checksum: 4d3ee269cb9f826cda41202b19433b6e (MD5) Rejected by Messias Victor Telles de Carvalho (messias.victor@unesp.br), reason: Oi Patrick, O seu trabalho apresenta alguns erros em relação a formatação seguindo o manual de trabalhos acadêmicos da FCA. Entre em contato com Messias (messias.victor@unesp.br), para que ele verifique as correções a serem feitas. 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Agradecemos a compreensão. on 2022-10-03T15:31:28Z (GMT) Submitted by Patrick Luan Ferreira dos Santos (patricklfsantos@gmail.com) on 2022-10-05T14:26:48Z No. of bitstreams: 1 Tese de doutorado_Patrick_tifton_2022.pdf: 72633229 bytes, checksum: 4785a76c35bc76054fc71e26ae670036 (MD5) Approved for entry into archive by Messias Victor Telles de Carvalho (messias.victor@unesp.br) on 2022-10-05T18:16:44Z (GMT) No. of bitstreams: 1 santos_plf_dr_botfca.pdf: 72633229 bytes, checksum: 4785a76c35bc76054fc71e26ae670036 (MD5) Made available in DSpace on 2022-10-05T18:16:44Z (GMT). No. of bitstreams: 1 santos_plf_dr_botfca.pdf: 72633229 bytes, checksum: 4785a76c35bc76054fc71e26ae670036 (MD5) Previous issue date: 2022-07-29 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) A grama bermuda híbrida ‘Tifton 419’ é amplamente utilizada em campos esportivos, devido a sua resistência ao pisoteio, folhas finas que conferem maciez ao gramado e amortece o impacto dos jogadores e rápida recuperação de danos ocasionados pelo jogo. Contudo, áreas gramadas necessitam de manejos de adubação e irrigação adequados para seu o desenvolvimento e para propiciar uma boa prática do esporte. Assim, o objetivo do trabalho foi avaliar o manejo da irrigação e doses de nitrogênio no desenvolvimento de ‘Tifton 419’. O delineamento experimental foi em esquema fatorial (2x5), com dois manejos de irrigação (irrigação diária e irrigado a cada dois dias) e 5 doses de N (fonte Sulfato de amônia) (0; 281,25; 421,88; 703,13 e 843,75 kg N ha-1 ano-1), com 4 repetições. Cada parcela era de 25m2 (5,0 x 5,0m), com 1,0m de bordadura. As doses de N, foram parceladas tendo como base a exigência da cultura (15% inverno, 25% primavera, 35% verão, 25% outono). As avaliações foram: desenvolvimento, qualidade estética e jogabilidade do gramado e ainda avaliações físicas e químicas do solo. Observou-se que uma irrigação a cada dois dias mantém a estética e jogabilidade sem interferir no desenvolvimento da grama. Ainda, doses muito baixas ou muito elevadas são prejudiciais para a qualidade do gramado. Assim, conclui-se que o uso da dose de 421,88 kg N ha-1 ano-1 parcelada em 12 vezes respeitando a porcentagem para cada estação (15% inverno, 25% outono, 35% verão e 25% primavera) e utilizando como fonte sulfato de amônio, aliada a uma frequência de irrigação a cada dois dias é recomendada para o desenvolvimento da grama bermuda ‘Tifton 419’. 'Tifton 419' hybrid bermuda grass is widely used in sports fields, due to its resistance to trampling, thin leaves that give smoothness to the turf and cushion the impact of players and fast recovery from damage caused by the game. However, turfgrasses areas need proper fertilization and irrigation management for their development and to provide a good practice of the sport. Thus, the objective of this work was to evaluate the management of irrigation and nitrogen doses in the development of 'Tifton 419'. The experimental design was in a factorial scheme (2x5), with two irrigation managements (daily irrigation and irrigated every two days) and five doses of N (source ammonium sulphate) (0; 281.25; 421.88; 703.13 and 843.75 kg N ha-1 year-1), with 4 repetitions. Each plot was 25m2 (5.0 x 5.0m), with 1.0m of border. The doses of N were divided based on the requirement of the crop (15% winter, 25% spring, 35% summer, 25% autumn). The evaluations were: development, aesthetic quality and playability of the turfgrass, and physical and chemical evaluations of the soil. It was observed that irrigation every two days maintains the aesthetics and playability without interfering with the development of the grass. Also, doses that are too low or too high are detrimental to turf quality. Thus, it is concluded that the use of dose of 421.88 kg N ha1 year-1 split in 12 times respecting the percentage for each season (15% winter, 25% autumn, 35% summer and 25 % spring) and using ammonium sulfate as a source, combined with a frequency of irrigation every two days is recommended for the development of 'Tifton 419' bermuda grass 2019/14670-4

Pig slurry (PS) has been used as soil fertilizer due to its nutrient and organic matter contents, which may improve soil nitrogen, carbon, and sulfur stocks. The objective of this work was to evaluate the best PS dose that favors the increase in dry matter production and carbon (C), nitrogen (N), and sulfur (S) contents and stocks after applications of PS to soils with Tifton-85 for six years. The experiment was conducted in a randomized block design with four replications, in a hay-producing area under a clayey Typic Hapludox in southern Brazil. The treatments consisted of annual applications of organic and mineral fertilizers at rates based on their N contents, using PS (100, 200, 300, and 400 kg ha−1) and urea (200 kg ha−1), and a control without N application. Samples of the soil in 0–5, 5–10, and 10–30 cm layers were collected in March 2019 and evaluated for soil bulk density and N, C, and S contents and stocks. The Tifton-85 dry matter production was evaluated using samples from three cuts carried out between 2012/2013 and 2017/2018 agricultural years. The applications of increasing doses of PS in Tifton-85 pastures over six years increase linearly the dry matter and soil organic C, N, and S stocks in the 0–30 cm layer. The PS rate equivalent to 100 or 200 kg ha−1 of N is recommended for increasing soil C, N, and S stocks, since it resulted in C, N, and S stocks equal to or higher than the control and mineral (urea) treatments.