IOSR-JAVS   Volume-4 ~ Issue-2 ~ JULY-AUG-2013

ABSTRACT:Field experiments were carried out during the 2011/2012 cropping seasons in the flood plain soil of the Teaching and Research Farms of the Delta State University, Asaba Campus, Asaba. The aim was to evaluate the effects of organomineral fertilizer on the yield and yield components of rice. The treatments were four levels of organomineral fertilizer (poultry manure fortified with ammonium nitrate) and a control at the rates of 0, 2.5, 5.0, 7.0 and l0 tha-l. The experiment was laid out in a randomized complete block design replicated three times. Data were collected at the 4th , 8th , 12th and 16th weeks after planting (WAP) on plant height, total leaf area, number of tillers, straw and grain yield, 1000 grain weight and harvest index. Data collected were subjected to analysis of variance and significant differences separated using student-Newman-Keals test. The results showed that 10 tha-1 treatment application gave the highest values in plant height (75.45cm), leaf area (374.24), straw and grain yield 534.20 and 625.03 kgha-1 and 1000 grain weight 42.7 g/ha-1. There was a Synergistic affects of organomineral fertilizer in all growth and yield parameters evaluated.

Keywords: Effects, different levels, organomineral fertilizer, Rice.

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ABSTRACT: The daily rainfall and temperature data (1977-2007) of Kharagpur were analyzed to know seasonal and annual variability. The monsoon season June-September was characterized for seasonal trends. FAO Aquacrop model version 3.1 was tested to understand the response of rice to temperature, CO2, water and to simulate the grain yield of rice under various independent data sets. The inter-annual variability and trends of monthly maximum, minimum, mean temperatures and rainfall for the crop growing season had been analyzed. The results showed that there was decrease in yield with per°C increase in temperature and increase in yield with per mm increase in rainfall in Subtropical region. The results of the study revealed that the grain yield increased an average of 0.35 kg/ha with per mm increase in rainfall and decreased by 156.2 kg/ha per degree rise in mean temperature at that region. The simulation study had also conducted under different temperature, rainfall scenarios and CO2 concentration. The most negative scenario was Tmax4°C+Tmin4°C+50 ppm CO2 (grain yield reduced by 8.31%) and Tmax4°C+Tmin4°C+(P-10)mm (grain yield reduced by 37.67%).

Keywords - Aquacrop v3.1, Climate variability, temperature, trend, rainfall, yield

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ABSTRACT: The Experiment was designed to compare the internal and external egg quality traits of three phenotypes of village chickens. The study was carried out at Modibbo Adama University, poultry farm, Yola.The research lasted for a period of eight months. Three phenotypes of Sixteen (16) hens and Two (2) Cockerels each (48 breeder Hens and 6 Cocks) were purchased and assigned randomly for the study. A total of two hundred and seventy fertile eggs were collected for the study. Digital electric balance, Micrometer screw gauge and Varnier caliper were used to determine the parameters. Egg width, albumin height and width significantly (p<0.001) differ among the phenotypes. Egg weight, yolk height, yolk index and haugh unit had a significant (p<0.01) effect on all the phenotype. Egg length, egg index and shell weight had significant (p<0.05) effect on the phenotype. The egg quality traits were significantly affected by the type of phenotypes except yolk width and shell thickness. Frizzle feathered consistently produced heavier, longer, wider egg and albumin and heavier shell. Similarly frizzle naked neck produced higher albumin and yolk height and haugh unit. Furthermore naked neck produced higher egg width, egg and yolk index and yolk height. Frizzle and Smooth feathered chickens and its associate produced significant positive and negative correlations in egg quality traits. Naked neck and it crosses produced significant positive correlation in all the egg quality traits studied. It could therefore be concluded that crossing between Frizzle and naked neck feathered chicken produced better egg quality traits required. I, recommend Frizzle Naked neck chickens to be considered for table eggs. Key words: Phenotypes, egg quality, Varnier caliper, Digital electric balance, Micrometer screw gauge

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