Open Access Short Research Article

Nutritional Status of Isabel and Niagara Rosada Vines with Integrated Diagnosis and Recommendation System (DRIS) and Ranges of Sufficiency

Caroline Merlo Meneghelli, Lorena Aparecida Merlo Meneghelli, Julião Soares de Souza Lima, Samuel de Assis Silva, Jussara Moreira Coelho, Eduardo France Oza

Journal of Experimental Agriculture International, Page 1-10
DOI: 10.9734/JEAI/2018/41143

Nutritional diagnosis is an efficient tool to detect a dietary imbalance of plants. This work aimed to evaluate the nutritional status of grapevines of the cultivars Niagara Rosada and Isabel by the methods Sufficiency Bands (SB) and DRIS in three environments in the municipal district of Santa Teresa-ES. Six vineyards had selected at three different high (250, 500 and 650 meters high) of the Niagara Rosada and Isabel cultivars. To perform the leaf diagnosis, complete and healthy leaves had collected at the time of full bloom, and the first fresh leaf opposite the first bunch had gathered. Plant tissues had collected and analysed for N, P, K, Ca, Mg, S, B, Cu, Fe, Mn and Zn contents. The results had submitted to statistical analysis and interpretation of the results of the foliar study of each vineyard had performed by the method of the Sufficiency Ranges, as proposed by Terra (2003) and by the DRIS method. The nutrients Zn, S, Cu and Mg were the most limiting for deficiency, and Fe, B, Ca and Fe were the most limiting by excess. There was a divergence between the DRIS and RS methods in nutritional diagnosis for vines in the three environments. The DRIS method, considering the interaction between nutrients, determines with better accuracy when nutrients are limiting.

 

Open Access Original Research Article

Effect of Saline Concentrations in Melon under Different Substrates in Hydroponic System

Islan Diego Espindula de Carvalho, Carla Caroline Alves Pereira, Adônis Queiroz Mendes, Fernando Antônio Tenório da Rocha, Fabian Santana Silva, Roberto de Albuquerque Melo, Jackson da Silva, Dimas Menezes

Journal of Experimental Agriculture International, Page 1-12
DOI: 10.9734/JEAI/2018/41027

The results show that the culture of the melon in hydroponic medium using different substrates, and increasing concentration of NaCl- salts, indicated that when the electrical conductivity (EC) levels increases as 2.0; 5.0; 8.0 and 11.0 dS.m-1, the melon growth was higher by 2.88 cm per day, with EC of 2 Sm-1. Thereafter, decreases the growth rate of melon as 2.33, 1.77 and 1.23 cm per day, when EC's goes from 5, 8 and 11 dS.m-1, respectively. In addition, the substrates sand, coconut powder and the commercial substrate (Basaplant) or salts-substrates, had no-effect on melon growth. The EC of 2 d.Sm-1 presented a higher growth rate, with a mean growth of 2.88 cm per day, the EC's of 5, 8 and 11 dS.m-1, respectively presented a growth rate of 2.33; 1.77 and 1.23 cm per day. The increase in salt concentration in the solution negatively influenced the morphology and color of the melon leaves. The substrates washed sand, coconut powder and Basaplant presented no significant difference in the effects on the melon culture. The substrate type did not influence the effect of the salt on the melon.

 

Open Access Original Research Article

The Study of Morphological Characteristics, Dry Matter Production and Yield of Four Sugarcane (Saccharum officinarum L.) Varieties in South-Western Nigeria

K. A. Nafiu, V. O. Chude, O. O. Oworu

Journal of Experimental Agriculture International, Page 1-7
DOI: 10.9734/JEAI/2018/33245

The study was carried out during the wet cropping season of 2000 and dry season of 2001, respectively at the farm site of Olabisi Onabanjo University, Ago-iwoye, Ogun State in South- West zone of Nigeria to determine the weight of cane, dry matter and yield of four varieties of sugarcane (Saccharum officinarum L.) in response to NPK 20: 10: 10 fertilizer. Varieties of sugarcane used were Co62175, NCS005, NCS004 and NCS003 and the treatments were laid out in Randomized Complete Block Design (RCBD) replicated three times. The statistical analysis was done using Analysis of Variance (ANOVA) and means were separated with LSD (Least Significant Difference) at p < 0.05. Results showed significant differences between the varieties of the sugarcane with respect to the cane-weight and yield for both wet and irrigated seasons. During the wet season, cane weight per plot ranged from 1.35 kg to 0.48 kg plot-1. NCS005 had the highest cane weight of 1.35 kg plot-1 while the lowest was obtained from NCS003 (0.48 kg plot-1). This was also reflected in the yield which ranged from 9.74 ton/ha to 4.11 ton/ha with NCS005 having the highest (9.74 t/ha) and NCS003 the lowest (4.11 t/ha), suggesting close relationship between weight of cane and yield. The application of NPK 20:10:10 fertilizer increased the dry matter components of the cane and which were significant in % sucrose, % glucose, total sugar and crude fibre. The highest % sucrose, % glucose and total sugar were obtained from Co6215, while the lowest was obtained from NCS003. Crude fibre was significantly different among the four varieties at p<0.05 level with the highest obtained in NCS003 and Co6215. The same trend was obtained under irrigation in 2001 cropping season. In conclusion, the application of NPK fertilizer increased sugar concentration and sugar-cane yield for NCS005 and Co6215 compared to NCS003 and NCS004 varieties.

 

Open Access Original Research Article

Water Deficit as a Limiting Factor to the Initial Growth of Coffee Conilon Variety Diamante

Wilian Rodrigues Ribeiro, André Alves Pinheiro, Daniel Soares Ferreira, Morgana Scaramussa Gonçalves, Camila Aparecida da Silva Martins, Edvaldo Fialho dos Reis

Journal of Experimental Agriculture International, Page 1-11
DOI: 10.9734/JEAI/2018/41156

The water deficit is considered one of the main limiting factors of agricultural production, studies that aim to understand it become essential for improving productivity and rational use of water resources. Thus, the objective of this work was to evaluate the influence of the reduction of the fraction of transpirable soil water (FTSW) under the growth variables of the nine clones that compose the variety “Diamante Incaper ES8112” of the coffee Conilon and to estimate the critical FTSW (when the growth potential is reduced by the limitation of the transpiration process). The nine experiments were conducted in a greenhouse, located in the Center of Agrarian Sciences and Engineering of the Federal University of Espírito Santo, in the city of Alegre-ES, (20º45' S, 41º32' W and altitude of 269.0 m). The present study was carried out in the greenhouse, located in the Center of Agrarian and Engineering Sciences of the Federal University of Espírito Santo, in the city of Alegre-ES, Brazil. The experiment was carried out in a 9x2 factorial scheme, being clones of the variety Jequitibá Incaper ES 8122 in 9 levels and 2 levels of water regime (T0 - irrigated during the whole experiment, not suffering water deficit; Td - induced water deficit until the plants reached 10% of the relative transpiration of the T0 treatment), in a completely randomized design with 8 replications. The variables evaluated were: relative transpiration (RT), plant height (PH) and leaf area (LA). At the end of the experiments it was verified that the clones are affected at different times, showing that they have different water needs, being clone 104 characterized as the most resistant to the water deficit in the soil, for keeping the TR to a lower value of FTSW (0.47) and clone 108 was characterized as the most sensitive to soil moisture variation, with critical FTSW value of 0.82.

 

Open Access Original Research Article

Effect of Leaf Sun Protector on Initial Growth of Khaya senegalensis under Water Deficiency in Different Microclimatic Conditions

Erilva Machado Costa, Talita Miranda Teixeira Xavier, José Eduardo Macedo Pezzopane, Siléia Oliveira Guimarães, Alcides Pereira Santos Neto, Mariana Duarte Silva Fonseca

Journal of Experimental Agriculture International, Page 1-7
DOI: 10.9734/JEAI/2018/40396

African mahogany (Khaya senegalensis) is considered as an alternative for forest implantation due to its fast growth and wood properties. However, in some regions, there have been frequent reports of seedling loss or reduced initial growth as a consequence of water scarcity. An alternative way is the use of leaf sun protector, to modify the energy balance and reduce water deficit impacts. Thus, the objective of the present study was to assess the effect of applying leaf sun protector on the growth of young Khaya senegalensis plants submitted to water deficit soil under two microclimatic conditions: high and low atmospheric demand. The plants were kept under water deficit corresponding to 20% of the available water in the soil and treatments were adopted with and without calcium-based leaf sun protector inside greenhouse acclimatized with controlled temperature and relative humidity. Growth was analyzed based on values of total dry matter, leaf area and specific leaf area, after three months of experimenting. Applying leaf sun protector reduced the impact of water deficit on Khaya senegalensis plant growth, especially in the condition of high atmospheric demand, characterized by high vapor pressure deficit and temperature values.