<b>Nitrogen management effects on soil mineral nitrogen, plant nutrition and yield of super early cycle common bean genotypes

Abstract

ABSTRACT. This study was conducted to measure the effects of the timing of nitrogen fertilization (NF) on soil N-NH 4 + and N-NO 3 -, macronutrient contents in the leaves and grains, and the grain yield of super early genotypes (SEG) of common bean. Field experiments were performed for four growing seasons in an Oxisol soil in Santo Antônio de Goiás, Brazil, using a randomized block experimental design in a split plot scheme. The plots were planted with common bean SEG, and the subplots were the NF timings, including a treatment without N fertilization. The available soil N with improved fertility and medium to high levels of organic matter were enough to meet the N demands of the common bean crop in order to achieve yields of up to 3,000 kg ha -1 . Fertilization with N, regardless of the time of application, provided no increase in the yield components, grain yield and the N, P and K contents in the leaves and grains of the common bean SEG. The genotypes CNFC 15873 and CNFC 15875 had higher grain yields in the rainfed summer, and the genotype CNFC 15874 had higher grain yields in the irrigated winter growing season. It can be inferred that the use of common bean SEG, with life cycles ranging from 65 to 77 days, can be a promising technology, providing grain yields similar to the control (IPR Colibri).

Productivity and Economics of Inoculated Common Bean as Affected by Nitrogen Application at Different Phenological Phases

“…However, N application rates reduces nodulation but increases common bean vegetative growth (Soares et al 2016), as observed in our study. According to the literature, nitrogen is the nutrient that most influences common bean development (Nascente et al 2017), since this nutrient increases the chlorophyll content and leaf area index, hence the levels of net photosynthesis, which results in a higher dry matter accumulation (Crusciol et al 2007). Therefore, growth parameters, such as leaf area index (LAI) and shoot dry mass (SDM), are positively affected by nitrogen availability in the soil, as reported by Albuquerque et al (2012).…”

“…In part, this is due to the use of technologies during crop management, such as the use of irrigation, quality seeds, pesticides, and fertilizers. Among these fertilizers, N-fertilizers are of great importance because they provide nitrogen (N), one of the most absorbed nutrients by common bean (Biscaro et al 2011) and the one that most influences crop growth (Nascente et al 2017). Nfertilizer is a highly demanded input by the Brazilian agriculture, especially under Cerrado soil conditions.…”

Componentes De Produção De Feijoeiro Sob Adubação Mineral, Orgânica E Cúprica

“…A adubação com N, independentemente da época de aplicação, não proporcionou incrementos nos componentes de produção, produtividade de grãos e teores de N, P e K nas folhas e grãos de genótipos superprecoces do feijão-comum (Nascente et al, 2017). Já a adição de doses crescentes de P aos solos promoveu aumento dos componentes relacionados ao crescimento do feijoeiro, principalmente matéria seca e conteúdo de P (Santos et al, 2011).…”

Soluble nitrogen forms in sand soil of Pallag: a quantitative report

“…Nitrogen (N) is an essential element for plants, takes various forms in soil 1 , and is one of the most limiting nutrients for various crops [2][3][4] . Nitrogen is present in soils as inorganic nitrogen (nitrate, ammonium, and dinitrogen) and organic nitrogen (urea and amino acids) 5 .…”