Morfogênese na germinação e na fase de estabelecimento da Brachiaria ruziziensis submetida à adubação nitrogenada e potássica

This study was conducted to assess the morphogenic responses of Brachiaria ruziziensis subjected to nitrogen and potassium fertilization in the germination and establishment phase. It was used a complete randomized experimental design in 4x4 factorial arrangement with three replicates. There were used 0, 100, 200 and 300kg N ha-1 and 0, 60, 90 and 120kg K ha-1. In the germination, it was verified the effect of the interaction N x K in SER. There was isolated effect of nitrogen doses on LAR, LER, phyllochron, LLN, LSR. Potassium exerted isolated effect on the LLS and LLN. In the established phase, it was observed that there was a significant interaction between N x K for LER and LFL. There was isolated effect of nitrogen on LAR, SER, phyllochron, LLN, LSR and LLS. Potassium exerted isolated effect on LLS, LLN and LSR. Nitrogen had greater effect on the morphogenesis than potassium on both, germination and established phase.

Este estudo foi realizado com o objetivo de avaliar as respostas morfogênicas da Brachiaria ruziziensis submetida à adubação nitrogenada e potássica na germinação e na fase de estabelecimento. Adotou-se esquema fatorial 4x4 em DIC, com três repetições. Foram utilizadas as doses 0, 100, 200 e 300kg N ha-1 e as doses de 0, 60, 90 e 120kg K ha-1. Verificou-se, na avaliação na germinação, efeito da interação N x K na TAlC. Houve efeito isolado das doses de nitrogênio sobre a TApF, TAlF, filocrono, NFV e TSF. O potássio exerceu efeito isolado sobre a DVF e NFV. Na avaliação de estabelecimento, observou-se que houve efeito da interação N x K para TAlF e CFF. Houve efeito isolado das doses de nitrogênio sobre a TApF, TAlC, filocrono, NFV, TSF e DVF. O potássio exerceu efeito isolado sobre a DVF, NFV e TSF. Tanto na germinação quanto no estabelecimento, o nitrogênio exerceu maior efeito sobre a morfogênese do que o potássio.

Morfogênese na germinação e na fase de estabelecimento da Brachiaria ruziziensis submetida à adubação nitrogenada e potássica

This study was conducted to assess the morphogenic responses of Brachiaria ruziziensis subjected to nitrogen and potassium fertilization in the germination and establishment phase. It was used a complete randomized experimental design in 4x4 factorial arrangement with three replicates. There were used 0, 100, 200 and 300kg N ha-1 and 0, 60, 90 and 120kg K ha-1. In the germination, it was verified the effect of the interaction N x K in SER. There was isolated effect of nitrogen doses on LAR, LER, phyllochron, LLN, LSR. Potassium exerted isolated effect on the LLS and LLN. In the established phase, it was observed that there was a significant interaction between N x K for LER and LFL. There was isolated effect of nitrogen on LAR, SER, phyllochron, LLN, LSR and LLS. Potassium exerted isolated effect on LLS, LLN and LSR. Nitrogen had greater effect on the morphogenesis than potassium on both, germination and established phase.

Este estudo foi realizado com o objetivo de avaliar as respostas morfogênicas da Brachiaria ruziziensis submetida à adubação nitrogenada e potássica na germinação e na fase de estabelecimento. Adotou-se esquema fatorial 4x4 em DIC, com três repetições. Foram utilizadas as doses 0, 100, 200 e 300kg N ha-1 e as doses de 0, 60, 90 e 120kg K ha-1. Verificou-se, na avaliação na germinação, efeito da interação N x K na TAlC. Houve efeito isolado das doses de nitrogênio sobre a TApF, TAlF, filocrono, NFV e TSF. O potássio exerceu efeito isolado sobre a DVF e NFV. Na avaliação de estabelecimento, observou-se que houve efeito da interação N x K para TAlF e CFF. Houve efeito isolado das doses de nitrogênio sobre a TApF, TAlC, filocrono, NFV, TSF e DVF. O potássio exerceu efeito isolado sobre a DVF, NFV e TSF. Tanto na germinação quanto no estabelecimento, o nitrogênio exerceu maior efeito sobre a morfogênese do que o potássio.

Morfogênese na germinação e na fase de estabelecimento da Brachiaria ruziziensis submetida à adubação nitrogenada e potássica

This study was conducted to assess the morphogenic responses of Brachiaria ruziziensis subjected to nitrogen and potassium fertilization in the germination and establishment phase. It was used a complete randomized experimental design in 4x4 factorial arrangement with three replicates. There were used 0, 100, 200 and 300kg N ha-1 and 0, 60, 90 and 120kg K ha-1. In the germination, it was verified the effect of the interaction N x K in SER. There was isolated effect of nitrogen doses on LAR, LER, phyllochron, LLN, LSR. Potassium exerted isolated effect on the LLS and LLN. In the established phase, it was observed that there was a significant interaction between N x K for LER and LFL. There was isolated effect of nitrogen on LAR, SER, phyllochron, LLN, LSR and LLS. Potassium exerted isolated effect on LLS, LLN and LSR. Nitrogen had greater effect on the morphogenesis than potassium on both, germination and established phase.

Este estudo foi realizado com o objetivo de avaliar as respostas morfogênicas da Brachiaria ruziziensis submetida à adubação nitrogenada e potássica na germinação e na fase de estabelecimento. Adotou-se esquema fatorial 4x4 em DIC, com três repetições. Foram utilizadas as doses 0, 100, 200 e 300kg N ha-1 e as doses de 0, 60, 90 e 120kg K ha-1. Verificou-se, na avaliação na germinação, efeito da interação N x K na TAlC. Houve efeito isolado das doses de nitrogênio sobre a TApF, TAlF, filocrono, NFV e TSF. O potássio exerceu efeito isolado sobre a DVF e NFV. Na avaliação de estabelecimento, observou-se que houve efeito da interação N x K para TAlF e CFF. Houve efeito isolado das doses de nitrogênio sobre a TApF, TAlC, filocrono, NFV, TSF e DVF. O potássio exerceu efeito isolado sobre a DVF, NFV e TSF. Tanto na germinação quanto no estabelecimento, o nitrogênio exerceu maior efeito sobre a morfogênese do que o potássio.

Tiller population density and tillering dynamics in marandu palisade grass subjected to strategies of rotational stocking management and nitrogen fertilization - doi: 10.4025/actascianimsci.v34i3.13739

The objective of this experiment was to evaluate tiller population density and the dynamics of the tillering process in marandu palisade grass subjected to strategies of rotational stocking management and nitrogen fertilization. Treatments corresponded to combinations between two targets of pre-grazing conditions (sward surface height of 25 and 35 cm) and two rates of nitrogen application (50 and 200 kg ha-1 year-1), and were allocated to experimental units according to a 2 x 2 factorial arrangement in a randomised complete block design, with four replications. The following response variables were studied: initial (TPDi), intermediate (TPDm) and final (TPDf) tiller population density as well as the rates of tiller appearance (TAR) and death (TDR) and the tiller population stability index (SI). TPDi was similar to all treatments, with differences in tiller population density becoming more pronounced as the experiment progressed, resulting in larger TPDf on swards managed at 25 cm pre-grazing height. Tiller death was larger on swards managed at 35 cm, with differences in tiller appearance being recorded only from February 2010 onwards. Stability of tiller population was higher on swards managed at 25 cm pre-grazing height. Overall, there was no effect of nitrogen on the studied variables, and the most adequate grazing strategy corresponded to the pre-grazing height of 25 cm, reg

Tiller population density and tillering dynamics in marandu palisade grass subjected to strategies of rotational stocking management and nitrogen fertilization - doi: 10.4025/actascianimsci.v34i3.13739

The objective of this experiment was to evaluate tiller population density and the dynamics of the tillering process in marandu palisade grass subjected to strategies of rotational stocking management and nitrogen fertilization. Treatments corresponded to combinations between two targets of pre-grazing conditions (sward surface height of 25 and 35 cm) and two rates of nitrogen application (50 and 200 kg ha-1 year-1), and were allocated to experimental units according to a 2 x 2 factorial arrangement in a randomised complete block design, with four replications. The following response variables were studied: initial (TPDi), intermediate (TPDm) and final (TPDf) tiller population density as well as the rates of tiller appearance (TAR) and death (TDR) and the tiller population stability index (SI). TPDi was similar to all treatments, with differences in tiller population density becoming more pronounced as the experiment progressed, resulting in larger TPDf on swards managed at 25 cm pre-grazing height. Tiller death was larger on swards managed at 35 cm, with differences in tiller appearance being recorded only from February 2010 onwards. Stability of tiller population was higher on swards managed at 25 cm pre-grazing height. Overall, there was no effect of nitrogen on the studied variables, and the most adequate grazing strategy corresponded to the pre-grazing height of 25 cm, reg