-This study assessed the effect of successive applications of pig slurry on the dry matter (DM) production and the nitrogen use efficiency of giant missionary grass along two years. A total of 55, 110, 165, 220 and 275 m 3 of pig slurry/ha/year were applied in order to supply 100, 200, 300, 400 and 500 kg of total N/ha/year, respectively. These treatments were compared with the ammonium nitrate (200 kg of N/ha/year) source of N and with a control (no nitrogen application).Annually, nitrogen was applied in four divided doses, after the cutting of forage grasses, which takes place five times a year.The total DM yield did not differ between years and increased linearly as a function of pig slurry application, ranging from 2,698 kg of DM/ha/year (control) to 11,371 kg of DM/ha/year (275 m The efficiency index of pig slurry ranged from 0.52 to 0.72.

A produção de figos para consumo in natura, no sul do Brasil, é limitada pelas chuvas, que causam elevadas perdas por podridão. O uso da poda drástica, por sua vez, retarda o início da colheita e as baixas temperaturas impedem o crescimento e a maturação dos frutos a partir do início do outono. O cultivo da figueira está sendo estudado em ambiente protegido como tecnologia para ampliar o período de colheita, elevar a produtividade e minimizar perdas de frutos. Figueiras cv. Roxo de Valinhos foram cultivadas em ambiente protegido dotado de sistema de irrigação por gotejamento e submetidas a três épocas de podas, no segundo e terceiro ciclos vegetativos (15 de maio, 10 de agosto e 5 de outubro). As plantas foram conduzidas, no segundo ciclo, com 4 e 8 ramos por planta, espaçadas de 0,75 m x 1,90 m e de 1,50 m x 1,90 m, respectivamente, e, no terceiro ciclo, com 6 e 12 ramos por planta, nos respectivos espaçamentos. O delineamento experimental foi com quatro blocos casualizados, os tratamentos dispostos em faixa e duas plantas úteis por parcela. O cultivo do figo em ambiente protegido e com fertirrigação é tecnicamente viável na região de Passo Fundo - RS. A produção obtida é equivalente a 41 t.ha-1 e 43 t.ha-1 no segundo e terceiro ciclos de cultivo, respectivamente. A poda realizada no início de agosto e as plantas conduzidas com 8 a 12 ramos, no espaçamento de 1,50 m x 1,90 m, favoreceram a taxa de frutificação, a produção por planta e por área, além de maior período de colheita. O sistema de cultivo de figo em ambiente protegido foi eficiente em prevenir perdas por rachaduras e podridões de frutos.

-In this study, the phenotypic diversity of five accessions of giant missionary grass (Axonopus jesuiticus × (V 14337, V 14404). Group I presented the greatest dry matter production of stolon and aboveground, which were the traits with the largest relative contribution to genetic divergence, 38.67% and 38.31%, respectively. Accessions V 14403 and V 14405 are the most promising for agronomic evaluations that address their records as forage cultivars.

No abstract

The objective of this study was to evaluate the effect of treatment with simple or coated nanoparticle and concentrations on storage time and the germination parameters in corn seeds. The treatments composed of three magnesium sources, magnesium oxide nanoparticles and nanoparticles in the form of (MgO NPs), magnesium carbon oxide core-shell nanoparticles (MgO@C NPs) and magnesium nitrate [Mg(NO3)2]. Six concentrations 0 (control) 37.5, 75, 150, 300 and 600 mg.L-1 were applied. The treated seeds were submitted to germination tests, after different storage times: 0, 30, 60, 90 and 150 days and then the normal and abnormal seedlings were evaluated. The results indicate that the treatment process with simple or coated nanoparticles with optimal concentration value, between 75 and 150 mg.L-1 of Mg, can approximately increase 6% of normal seedlings in conjunction with the storage time (90-150 days). The exposure of the seeds to magnesium nitrate resulted in less normal plants, possibly due to the saline and toxic effect of this source. The best germination performance of seeds pretreated with simple or coated nanoparticles can be achieved at the concentration of 75 mg.L-1 and for the storage time of 150 days. There might be some negative effect for magnesium nitrate depending on concentration and storage time.