Open Access Original Research Article

Effect of Nitrogen, Phosphorus and Potassium Levels on Yield and Economics of Interspecific Hybrid Cotton (Gossypiumspp) under Southern Dry Zone of Karnataka

H. M. Honnappa, B. G. Shekara, Manjanagouda S. Sannagoudar, Lokesh Patil, N. Hamsa

Journal of Experimental Agriculture International, Page 1-8
DOI: 10.9734/JEAI/2019/47402

The field experiment was conducted at ZARS, V. C. Farm, Mandya during Kharif season of 2016 and 2017 in Southern Dry Zone of Karnataka to optimize levels of major nutrients for interspecific hybrid cotton. The experiment on nutrient management was laid out in RCBD with three replications using factorial concept involving nitrogen, phosphorus and potassium levels. The results revealed that application of 150 kg N ha-1 recorded significantly higher seed cotton yield (1857 kg ha-1) and net returns (Rs. 46,198 ha-1) compared to application of 100 kg N ha-1.     Among the phosphorus levels, significantly higher seed cotton yield (2046 kg ha-1) and net returns (Rs. 54,383) were recorded with application of 75 kg P2O5 ha-1 over application of 50 kg P2O5 ha-1. Among potassium levels, application of 100 kg K2O ha-1 recorded significantly higher seed cotton yield (1942 kg ha-1) and net returns (Rs. 49,608 ha-1) as compared to application of 50 kg K2O ha-1.

Open Access Original Research Article

Biochar Effect on Maize Yield in Selected Farmers Fields in the Northern and Upper East Regions of Ghana

Edward Calys-Tagoe, Adams Sadick, Edward Yeboah, Ben Amoah

Journal of Experimental Agriculture International, Page 1-9
DOI: 10.9734/JEAI/2019/44168

With the current global concern of high concentration of Green House Gases in the atmosphere and the current struggle to ensure food security for the growing population in Africa within this climate change scenario, biochar amendment to soils is gaining acceptance as an important management option for carbon sequestration, soil productivity and fertility improvement and climate change mitigation. This study was to investigate the effect of biochar on maize yield indices on selected farmers' fields (40 farmers) in the Northern and Upper East Regions of Ghana.  The biochar was produced from two feedstock, i.e. rice husk and sorghum. The test crop used was maize where biochar was applied alone and in combination with inorganic fertiliser. The treatments used for this studies were absolute control (No amendment), two tonnes of sorghum biochar, two tonnes of rice husk biochar, full rate of NPK (90:60:60), full rate of NPK with two tonnes of sorghum biochar and full rate of NPK with two tonnes of rice husk biochar. The results showed that biochar in combination with inorganic fertiliser had a significant influence on maize grain and biomass yield. The biochar also had a significant impact on soil pH, soil organic carbon and the available N, P and K. All the biochar contained more than 80% stable carbon and more than 0.3% labile carbon. Increase in pH was in the range of 4.5 to 5.6 and that of SOC from 0.7% in control to 1.3% in biochar amended treatment. Biochar in combination with inorganic fertiliser improve percentage Nitrogen from 0.07% to 2.4%, available Phosphorus from 6.8 ppmp to 14.2 ppmp and increased in K content was 60% above the control. Biochar in combination with inorganic fertiliser can significantly increase crop yield.

Decrease medical as well as a financial burden, hence improving the management of cirrhotic patients. These predictors, however, need further work to validate reliability.

Open Access Original Research Article

Physiological Changes in Seeds of Solanum paniculatum L. during Heat Stress

Girlânio H. Da Silva, Rute Q. Faria, Jordânia X. Medeiros, Larissa Chamma, Maurício H. Okada, Gisela Ferreira

Journal of Experimental Agriculture International, Page 1-8
DOI: 10.9734/JEAI/2019/46497

Physiological changes occur in seeds before and during the germination process when subjected to high temperatures. Considering that Solanum paniculatum presents an adaptation to different environments, the aim of this study was to evaluate physiological changes of level of heat stress tolerance in seeds of S. paniculatum, before and during germination. Four-time periods (12, 24, 48 and 72 h for the 45°C temperature) were tested before and after the germination process in seeds of S. paniculatum. The degree of humidity, imbibition curve, percentage of germination, mean germination time (MGT) and germination uniformity coefficient (T7525), relative frequency at different times of temperature exposure of 45°C. The seeds of S. paniculatum, characterized in the period of 432 h (18 days), present the three-phase water absorption pattern. Seeds submitted to heat stress during the germination process presented higher tolerance than those submitted to high temperatures before imbibition, suggesting greater stability of the physiological constituents of the seeds to stress. Germinability of S. paniculatum can be intensified even under stress and suggests a broader frequency distribution than seeds that did not undergo stress during germination.

Open Access Original Research Article

Estimates of Genetic Parameters and Selection Strategies in F1 Progenies Obtained from Endogamic Lines of Sour Passion Fruit

Maria Helena Menezes Cordeiro, Renato Domiciano Silva Rosado, Antônio Gustavo de Luna Souto, João Paulo Gava Cremasco, Carlos Eduardo Magalhães do Santos, Claudio Horst Bruckner

Journal of Experimental Agriculture International, Page 1-9
DOI: 10.9734/JEAI/2019/47093

Aims: This experiment was to obtain the genetic parameters and to define the best selection strategy in F1 progenies of sour passion fruit from the crossing between inbred lineages and heterozygous genotypes.

Study Design: Experimental design was completely randomized blocks with nine progenies and five replicates with four plants per plot.

Place and Duration of Study: Experimental Farm of Araponga operated by the Universidade Federal de Viçosa in Araponga county, Minas Gerais, Brazil from August 2015 to February 2017. 

Methodology: Fruit characteristics of the progenies were evaluated in the first year of production. Data were analyzed using ANOVA, and the genetic parameters were estimated. The selection strategies were indices of Mulamba and Mock and Smith and Hazel, Selection Among and Within Families, and Combined.

Results: Estimates of genetic parameters for fruit mass, pulp mass, bark mass, and bark thickness showed high genetic variability. The heritability coefficients for these characteristics were 0.95; 0.34; 1.00 and 1.00, respectively. Total soluble solids, titratable total acidity, pulp yield, and total soluble solids/total titratable acidity ratio values showed heritability coefficients equal to zero. Combined selection had the highest gains, followed by selection among and within families.

Conclusion: Estimates of genetic parameters for the passion fruit population indicated high genetic variability. All the selection strategies indicated gains with selection, with emphasis for combined selectionin genetic improvement of sour passion fruit.

Open Access Original Research Article

Effect of Fertilization on Yield and NPK Contents in Red Ginger

Ana María Peña-Gutiérrez, Julián Pérez-Flores, Nydia del Rivero-Bautista, Aida Olivera-de Los Santos

Journal of Experimental Agriculture International, Page 1-8
DOI: 10.9734/JEAI/2019/46151

Aim: The aim of the research was to evaluate the effect of NPK fertilization on red ginger yield and nutrient content of mature plants.

Study Design: 16 treatments were defined from N, P and K combinations, with three replications in complete random blocks. The experimental unit was one cluster with stems.

Place and Duration of Study: The study was conducted from February 2012 to January 2013 on a 10-years-old commercial plantation. The plantation is located at 18° 17’ 43.49’’ NL and 93° 12’ 28.68’’ WL in Comalcalco, Tabasco, Mexico.

Methodology: Each 15 days along a year were recorded variables for the cluster, and for commercial stems and flowers. Then one plant per experimental unit was separated into flower, leaf, stem and rhizome to analyze NPK. With the data, an analysis of variance, means comparison (Tukey, P ≤ 0.05), and Pearson correlation were performed.

Results: With the doses of 216-00-00 kg NPK ha-1, the plants developed the largest stem (2.17 cm) and flower (6.33 cm) diameters and the highest dry commercial (28.89 g) and total (199.3 g) biomass. The highest fresh weight of the non-commercial biomass (383.2 g) was found in plants fertilized with 322-04-90, but this value was statistically equal to that obtained with the doses 216-00-00 (335.81 g). The NPK content found in red ginger leaf, stem, flower and rhizome satisfied the requirements established for P, but not for N and K. The N content was the unique nutrient correlated to the yield of red ginger.

Conclusion: The fertilization with 216 kg N ha-1 was the best to favor red ginger yield.