Xihua Liu¹, Changjun Ding², Xiaohua Su^2,*

Phyton-International Journal of Experimental Botany, Vol.88, No.4, pp. 425-433, 2019, DOI:10.32604/phyton.2019.08285

Abstract The European black poplar (Populus nigra L.) has been used as a germplasm resource for the breeding of new poplar varieties around the world. The identification and screening of its high nitrogen use efficiency genotypes could enable the breeding of new resource-efficient poplar varieties. The accessions were screened using MALDI-TOF MS genotyping technology for ammonium transporter (AMT) and nitrate transporters (NRT) genes against phenotypic data for seedling height and ground diameter traits, in both low and high nitrogen environments. Allele re-sequencing of seven genes related to root development was carried out using the minisequencing method. By cluster… More >

Lei Chu, H. M. K. Darshika Hennayake, Haijun Sun*

Phyton-International Journal of Experimental Botany, Vol.88, No.3, pp. 261-267, 2019, DOI:10.32604/phyton.2019.07791

Abstract Intensive practices in forest soils result in dramatic nitrogen (N) losses, particularly ammonia (NH₃) volatilization, to adjacent environmental areas. A soil column experiment was conducted to evaluate the effect of bamboo biochar on NH₃ volatilization from tea garden and bamboo forest soils. The results showed that biochar amendment effectively reduced NH₃ volatilization from tea garden and bamboo forest soil by 79.2% and 75.5%, respectively. The soil pH values increased by 0.53-0.61 units after biochar application. The NH₄⁺-N and total N of both soils were 13.8-29.7% and 34.0-41.9% higher under the biochar treatments than under the control treatment, More >

Xiongyi Liang*, Chi-Man Lawrence Wu

The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.1, pp. 113-113, 2019, DOI:10.32604/icces.2019.05079

Abstract Ammonia (NH₃) plays an essential role in agriculture to meet global population explosion. Although the atmosphere consists of more than 78% of Nitrogen (N₂), industrial NH₃ synthesis from atmospheric N₂ gas requires harsh conditions of temperature (700~850 K) and pressure (50~200 atm), which annually consuming 2% of the world’s power. Recently, an electrocatalytic NH₃ fixation process under ambient condition was introduced. With this, six protons and electrons are gradually added (6H⁺ + 6e^- + N₂= 2NH₃), instead of breaking the triple bonds of N₂ in the traditional method, thus saving dramatic amount of energy. Along this theme, the synthesis of NH₃… 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… More >

A. Zoubir^a , R. Agounoun^a,*, I. Kadiri^b, K. Sbai^a , M. Rahmoune^a

Frontiers in Heat and Mass Transfer, Vol.7, pp. 1-6, 2016, DOI:10.5098/hmt.7.35

Abstract Boiling heat transfer process is important because it is a way to increase the flux density transmitted at low temperature differences. To quantify the thermal exchanges, we performed an experimental study of the nitrogen pool boiling, in transient conditions, on a horizontal brass ribbon for a fixed flux density. The results show that there is no break between the monophasic convection zone and the nucleated boiling region. In the nucleated boiling zone, the temperature variations are very small. We also note that the overheating required to trigger boiling increases with the time delay after the More >

Yang G^1,2, Z Zhang¹, G Zhang³, H Zhang², X Han³, CA Busso⁴

Phyton-International Journal of Experimental Botany, Vol.85, pp. 100-107, 2016, DOI:10.32604/phyton.2016.85.100

Abstract Phosphorus is an essential macronutrient for all living plants and plant production. Simultaneously, atmospheric nitrogen deposition also affects plant productivity at a global scale. However, few studies have investigated how plants respond to P addition while simultaneously considering N deposition. We investigated plant biomass, nutrient status and stoichiometric ratios on Potentilla tanacetifolia in response to P fertilization under contrasting N addition rates in a typical meadow steppe in Inner Mongolia, China. Aboveground biomass of P. tanacetifolia increased under increasing levels of P fertilization under conditions of N addition. However, there was no significant change in biomass when… More >

Hernández-Cruz AE¹, E Sánchez^2*, P Preciado-Rangel¹, M L García-Bañuelos², A Palomo-Gil¹, A Espinoza-Banda¹

Phyton-International Journal of Experimental Botany, Vol.84, No.2, pp. 454-460, 2015, DOI:10.32604/phyton.2015.84.454

Abstract In the production of cotton (Gossypium hirsutum L.), nitrogen fertilization is one of the most costly crop practices, but important to reach high yields. However, high nitrogen (N) content in plants does not always translate into a high fibre production. One way of assessing the efficiency of the N fertilizer is through the enzymatic activity of the nitrate reductase (NR). This is a key enzyme in N assimilation, whose activity is regulated by a number of endogenous and exogenous factors that determine yield. The aim of this study was to assess the effect of N fertilization… More >

Siliquini OA¹, GA Orioli², JC Lobartini²

Phyton-International Journal of Experimental Botany, Vol.84, No.2, pp. 338-344, 2015, DOI:10.32604/phyton.2015.84.338

Abstract Onion (Allium cepa) is an important horticulture crop because of its value as a food with a long shelf life being a relatively non-perishable product. It is very helpful to understand the growth response of the seeded onion crop to conduct appropriate field practices in attaining the highest or optimum yields. A three year field experiment was conducted using a variety of onion Valcatorce INTA, in a randomized block design with five replicates. Treatments were two plant densities and three rates of N application. The bulb growth followed a classical sigmoid curve. During the rapid growing More >

López-Elías JA, R González-Vega, E Márquez-Ríos, W Torres-Arreola

Phyton-International Journal of Experimental Botany, Vol.84, No.2, pp. 331-337, 2015, DOI:10.32604/phyton.2015.84.331

Abstract Proteins are one of the major metabolites in biomass from microalgae that constitute the diet of marine organisms grown in aquaculture, and are essential for their growth. The quantity of this component is influenced by nutrients, temperature and light intensity, among others. We examined the growth, biomass production and protein of Chaetoceros muelleri with two sources of nitrogen (nitrate and urea) at three concentrations, using the medium f/2 (0.88 mol/L) (nitrates) as control. The treatments were the medium 2f (3.53 mol/L) and 4f (7.05 mol/L) with NO_3^-, and the medium f/2 (0.88 mol/L), 2f (3.53mol/L) and 4f More >

López-Calderón MJ¹, U Figueroa-Viramontes^2*, M Fortis-Hernández¹, G Núñez-Hernández², E Ochoa-Martínez², JI Sanchez-Duarte²

Phyton-International Journal of Experimental Botany, Vol.84, No.1, pp. 8-13, 2015, DOI:10.32604/phyton.2015.84.008

Abstract An experiment with increasing rates of fertilizer and manure in silage corn was established to evaluate the agronomic crop response and to estimate the manure nitrogen availability. The treatments were designed to deliver 0, 67, 100 and 133% of the crop nitrogen requirements (CNR), using ammonium sulphate and manure as N source. Dry matter (DM) yield was similar among treatments receiving N, but those values were greater than those found in the control. Nitrogen extraction at harvest was not statistically different in treatments with fertilizer or manure, but it was higher in these treatments than… More >