Crescimento de rosa do deserto fertirrigada com diferentes proporções de nitrato/amônio

Abstract

This study aimed to determine NO3 - /NH4 + proportion delivered by fertigation that allows greater desert rose plants growth in pots. Plants were cultivated in greenhouse in polypropylene pots, using a mixture of sand and composted Pinus powder (1:1, v v-1) as substrate. Experimental design was completely randomized, with six treatments (control, 0/100 25/75, 50/50, 75/25 and 100/0 of NO3 – and NH4 + respectively), and ten replications. Fertigation was performed weekly in the amount of 100 mL per pot for 180 days. Variables evaluated were: shoot height, basal diameter of the caudice, number of branches, roots, leaves and caudice dry mass and macronutrient contents determination and accumulation in leaves, caudice and root. NO3 – and NH4 + proportion promoted a greater change in nutrient content in leaves compared to caudice and roots. The proportion 25/75 NO3 – /NH4 + is recommended for desert rose cultivation, as it provides the best results for most of the characteristics studied.

Seed biometry, growth, and seedling development of Adenium obesum (Forssk.) Roem. & Schult. in substrates

“…Therefore, the physical and chemical characteristics mentioned in T3 positively influenced the increase in stem thickness, a feature valued by consumers of this ornamental plant (STEGANI, 2019). The relationships between the germination and seedling development variables of the desert rose and the different substrates can be better explored through the height/stem diameter ratio (CARNEIRO, 1995).…”

Optimization of the NPK Ratio for Vegetative Growth in Aeschynanthus longicaulis

“…Nitrates are often a preferred source for horticultural crop growth, and high NH 4 -N levels are usually harmful to many horticultural crops. However, the appropriate NO 3 -N/NH 4 -N ratio benefits ornamental plant growth (Stegani et al, 2019).…”

Melhoramento da rosa-do-deserto

“…Além disso, o fornecimento de outros nutrientes como cálcio, magnésio, enxofre, boro e outros micronutrientes é indispensável para a produção de plantas de qualidade. Bons resultados no desenvolvimento de mudas foram observados com a utilização de NO 3 -/ NH 4 + , na proporção de 25/75 (STEGANI et al, 2019).…”