Brevedan RE, MN Fioretti, SS Baioni, IR Palomo, H Laborde

Phyton-International Journal of Experimental Botany, Vol.76, pp. 153-167, 2007, DOI:10.32604/phyton.2007.76.153

Abstract A long-term study was conducted at different locations of Southwestern Buenos Aires to evaluate the effects of N fertilization at different growth stages of soybean on yield, plant nitrogen concentration and seed protein and oil concentrations. Yields were increased in six out of ten trials, and the response was highest with N fertilization at the beginning of grain development (R5). Different nitrogen sources were applied at seeding which gave higher yields and increased seed protein content than the non-fertilized, non-nodulated treatment. Urea was the most effective N source. More >

Ron MM, T Loewy

Phyton-International Journal of Experimental Botany, Vol.86, pp. 68-73, 2017, DOI:10.32604/phyton.2017.86.068

Abstract In the southwest of Buenos Aires Province (Argentina) nitrogen (N) and phosphorus (P) deficiencies are important wheat yield limiting factors. The objective of this paper was to report on the comparative effectiveness of diammonium phosphate (DAP) and triple superphosphate (TSP) in the area covering a range of soils and years. Between 1983 and 1992, 13 experiments were carried out in farmer’s fields. Soils were classified as Ustolls and Udolls. The design of the experiments was of complete randomized split blocks. Horizontal treatments were P-sources (DAP and TSP) and rates (0 to 135 kg/ha). Vertical treatments were check and a single… More >

González-Cervantes G¹, JA Chávez-Simental², IA Ortiz-Sánchez³, LM Valenzuela-Núñez⁴, MA Macías-Corral⁵, JG Arreola-Avila⁶

Phyton-International Journal of Experimental Botany, Vol.86, pp. 40-45, 2017, DOI:10.32604/phyton.2017.86.040

Abstract The introduction of ornamental crops to the Comarca Lagunera is a great market opportunity for producers of flowers, just as it is the case of Caladium bicolor which is exported to Europe, USA, Caribbean islands and Africa. The use of organic products derived from cattle manure for fertilization, improves physical soil conditions and provides significant amount of nutrients to plants and reduce production costs. Therefore, the objective of this study was to quantify the growth of tubercle and root of the ornamental plant Caladium bicolor by applying organic fertilizer (OF) extracted from cattle manure. The experimental design was completely randomized… More >

Wang XG¹, Wuyunna^1*, CA Busso², YT Song¹, FJ Zhang¹, GW Huo¹

Phyton-International Journal of Experimental Botany, Vol.87, pp. 123-132, 2018, DOI:10.32604/phyton.2018.87.123

Abstract Chemical elements, such as carbon (C), nitrogen (N) and phosphorus (P), are major limiting nutrients in arid and semiarid grasslands and their stoichiometry (C:N:P) is a very important ratio to determine. In addition, it is critical to understand how plant stoichiometry responds to multiple environmental factors at the species level. In this study, we conducted a greenhouse experiment to investigate the effects of salt stress (4 g NaCl/kg soil), drought (35% of the soil water holding capacity) and N addition (10 g N/m²), as well as their interactions, on C, N and P concentrations and C:N:P ratios in two dominant… More >

Díaz-López E¹, A Morales-Ruíz¹, A Olivar-Hernández¹, HR Bravo-Delgado², JM Loeza-Corte³

Phyton-International Journal of Experimental Botany, Vol.87, pp. 18-24, 2018, DOI:10.32604/phyton.2018.87.018

Abstract Sunflower is a crop that is used as ornamental, oleaginous, forage, and currently as a bioremediation plant, of hard water affected soils. For this reason, the main objective of this investigation was to study the effect of potassium fertilization on yield under field conditions, and the effect of gibberellic acid (GA₃), at postharvest of inflorescences. Two experiments were established, under field and laboratory conditions. In the field experiment, four levels of potassium, 0, 50, 100 and 150 kg/ha were evaluated, under a randomized complete block design and four replicates (4×4) = 16 experimental units. The variables evaluated were agronomic and… More >