Values Of Growth Parameters Research Articles

Generalized logistic functions in modelling emergence of Brassica napus L.

The objective of this study was to determine whether generalized logistic functions (Richards model with time shift) may be used to predict emergence of winter rapeseed (Brassica napus L.) after its seed treatment with plant extracts from Taraxacum officinale roots under controlled environment conditions. Emergence analyses were conducted for winter rape whose seeds were treated with a plant extract and for the non-treated seeds sown to the soil at the site of earlier point application of the extract. Curves were plotted for experimental data by minimizing the square sum of differences between the experimental data and the mathematical model. To evaluate model fit, the mean squared error was divided into four factors. Computing modelling efficiency coefficients were also introduced to enable complete analysis. Results of simulation research demonstrate that the determined parameters of curves (e.g. values of growth parameters, time shift or the upper limit of population) describing the number of seedlings in the function of time stayed compliant to the interpretation with regard to the biology of the analyzed processes. The proposed mathematical description based on generalized logistic functions showed extraordinary fit (r = 0.999) to the experimental data, which makes it highly useful in predictive control of rapeseed emergence. In addition, the study enabled concluding that plant extracts application to the soil allowed achieving a higher maximal emergence rate compared to the control sample. The application of the plant extracts increased the final population of rapeseed and significantly accelerated the occurrence of the maximal emergence rate.

EFFECT OF MAGNETIZATION AND NANO POTASSIUM PARTICLES ON GROWTH, YIELD AND FRUIT QUALITY OF CUCUMBER UNDER PLASTIC HOUSE CONDITIONS

Two experiments were carried out under unheated plastic house conditions during the two seasons of 2014/15 and 2016/17 on cucumber cultivar (Hesham F1 hybrid) at the Protect Agriculture Location, Faculty of Agriculture, Kafrelsheikh University in the first season and at the Experimental Farm, Sakha Horticulture Research Station, Horticulture Research Institute, Agriculture Research Center in the second one, to study the effect of magnetization (control, magnetite, magnetized water and magnetite plus magnetized water), nano potassium particles (bulk 100% and nano form; 100, 75, 50 and 25% of recommended rate) and their combined interaction on vegetative growth parameters, fruit yield and its components, fruit quality and leaves chemical content. The results can be summarized as follows: Cucumber plants treated with magnetite plus magnetized water treatment produced the highest values of vegetative growth parameters, i.e., plant height, number of internodes, number of leaves, number branches, leaf area index and dry matter of the 6th leaf, early and total fruit yield (weight and number), fruit quality; fruit length, diameter, soluble solids content and firmness and leaves chemical content; total green color reading (SPAD), N, P and K compared to nontreated plants (control) which had the lowest values. As for nano potassium application treatments, 100 and 75% nano potassium particles followed by bulk potassium form treatments resulted in an increment of abovementioned vegetative growth characters, early and total fruit yields, fruit quality and leaves chemical content, while 25 % nano potassium particles treatment gave the lowest values in both seasons. The combined interaction between magnetite plus magnetized water and either 100 or 75% nano potassium particles followed by bulk potassium form treatments were better than the other combined interactions which gave the highest records of abovementioned characters in both seasons. Conclusively, it could be recommended that the treatment of combination between magnetite + magnetized water with both of 100 or 75 % nano potassium particles were more suitable for obtaining the largest early and total yields with good fruit quality and more profitable for growers and consumers of cucumber grown in the autumn season inside the plastic houses under Kafrelsheikh conditions and similar areas.

Quality of supplementary LED lighting effects on growth and photosynthesis of two different Lactuca recombinant inbred lines (RILs) grown in a tropical greenhouse

LED lamps with various combinations of red (R) and blue (B) wavelengths were used to supplement sunlight for the growth of a heat-resistant (HR) and heat-sensitive (HS) recombinant inbred lines (RIL) of lettuce. The RB-LED ratios were 100R:0B (0B), 92R:8B (8B), 84R:16B (16B), and 76R:24B (24B) with an equal PPFD of 100 μmol m−2 s−1. The greatest leaf expansion rates were observed at 8B for both genotypes. All HR-RILs had similar values of growth parameters and specific leaf area (SLA). However, higher values of growth parameters were observed in HS-RIL with 0B, 8B, and 16B than that under 24B and sunlight. Furthermore, HS-RIL had higher SLA under 0B compared to other conditions. Photosynthetic light-use efficiency and maximal oxygen evolution rate were the lowest under 8B for both genotypes. The quality of LED lighting, if provided, seemed to implicate genotype dependence, probably as a result of their different sensitivities to heat stress.

ROLE OF SEED PRIMING AND SPRAYING SOME BIO AND CHEMICAL SUBSTANCES IN RAISING RICE SALINITY TOLERANCE AND PRODUCTIVITY

The present investigation was carried out in 2015 and 2016 seasons at the experimental Farm of El-Sirw Agriculture at Research Station, Damietta province and lab of Rice Research and Training Center, Sakha, kafr-elsheikh province, Egypt. The objective of this study was to examine the effectiveness of seed priming and foliar spray thoric with solutions of some substances; salicylic acid (SA) 250 ppm, yeast (Saccharomyces cervisia) 2kg/fed, and the extraction of bacteria (Aizosprillium spp) 2% conc. at different growth stages (mid tillering, panicle initiation and booting stages) on the performance of three rice varieties viz; Giza177, Giza 179 and Egyptian hybrid one (EHR1) under saline soil conditions. An experiment was performed in spilt plot design with four replications. The tested rice varieties were distributed in the main plots while, the sub plots were devoted to the substances treatments. The salinity levels of experimental site were 7.0 and 7.3 dSm-1 in 2015 and 2016 seasons, respectively. The artificial salinity level in Lab experiment was 7.0 dSm-1. Significant difference in the performance of tested rice varieties was found in both seasons under Lab and field conditions. Under Lab experiment, Giza177 produced the highest values of germination characters; seed germination, germination energy, final germination and vigor index. Germination characteristics were positively improved owing to seed soaked in Aizosprillium without significant difference with salicylic acid compared to control (untreated one). Under field conditions, Egyptian hybrid rice one produced the highest values of growth parameters, most of yield attributes and grain yield. The tested substances enhanced all studied characters compared with control treatment. The impact of salicylic acid either foliar spray or soaking was superior compared with other treatments for the most studied characters and grain yield followed by bacteria foliar spray and bacteria soaking. Yeast treatments came in the last order. It could be concluded that, rice seed soaking or plant foliar spray with extraction of salicylic acid or bacteria more effective than yeast and improved growth and yield of rice under salt stress.

EFFECT OF SOME NUTRIENTS ON GROWTH, YIELD AND FIBER QUALITY OF EGYPTIAN COTTON UNDER SALINE CONDITION

Two pot experiments were carried out at the greenhouse of the Cotton Research Institute, Agric. Res. Cent., Giza, Egypt during 2015 and 2016 seasons to study the response of cotton plant to application of some nutrients to improve the performance of cotton plant under irrigation of saline water to increase growth, yield and yield components and fiber quality of Giza 90 cotton cultivar. The experimental design was a split plot design with four replications. Main plots included saline water solutions treatments (control, 2000, 4000, 6000 and 8000 ppm), sub plot included four nutrients application (Potassium Humate, Algex, Poly Ethylene Glycol (PEG) 6000 and Potassein compared with control). The obtained results could be summarized as follows: Irrigation with saline water over seasons significantly decreased plant height, number of fruiting branches/plant, number of open bolls /plant, boll weight, seed index, seed cotton yield per plant, fiber length, uniformity index, fiber strength and micronaire value, while, lint % was significantly increased. Nutrients application had significant effect on growth parameters, yield and its components and fiber properties under study, All nutrients treatments gave the highest values of growth parameters, yield and its components and fiber properties as compared with the control in both seasons. In general, plants sprayed with PEG gave the highest averages of plant height, number of fruiting branches/plant. Potassium Humate gave the highest averages of yield and its components and fiber properties followed by plants sprayed with Algex, while the plants sprayed with PEG as came the last in these respect in both seasons. Interaction between irrigation with slain water and nutrients application by salinity tolerance inducers had a significant effect on plant height, number of fruiting branches per plant, boll weight, number of open bolls /plant, seed index, seed cotton yield /plant and fiber quality under study in both seasons. Plants treated with foliar nutrients under salinity condation scored the highest average of growth parameters, yield and its components and fiber properties. Potassium Humate, Algex, PEG and Potassein applications to plants under normal and salinity conditions had positive effects on improving the performance of cotton plants, which increased plant growth and yield especially under salinity conditions.

Evaluation of the efficiency of Trichoderma, Penicillium, and Aspergillus species as biological control agents against four soil-borne fungi of melon and watermelon

Various experiments were carried out to promote biological control under semi-arid ecological conditions. In vitro assay, Aspergillus flavus seemed to be the most effective bioagent against Fusarium oxysporum f. sp. niveum and Fusarium solani f. sp. cucurbitae with mycelial inhibition rate above 50%. Aspergillus flavus, Aspergillus niger, and Aspergillus terreus exhibited an exceptional hyperparasitism against F. oxysporum f. sp. melonis. The mycelial growth of five Macrophomina phaseolina isolates decreased in the presence of Trichoderma harzianum (44.42%). In greenhouse experiments, both A. flavus and A. fumigatus used preventively of melon inoculated with FOM generated the highest damage reduction rate of top and root dry weights (40–42 and 51–52%, respectively) and the lowest disease severity index (DSI). A. flavus was also effective in improving the plant development with the highest shoot (SDW) and root (RDW) dry weight values. Penicillium digitatum, Trichoderma harzianum, and Trichoderma viride treated preventively on watermelon and melon plants inoculated with M. phaseolina decreased the damage of SDW and RDW and DSI. The development rate revealed the growth improvement potential of T. harzianum (watermelon, 15%) and A. flavus (melon, 12%). Watermelon plants inoculated with F. solani f. sp. cucurbitae and treated curatively with Trichoderma erinaceum, T. viride, and A. flavus and other inoculated by F. oxysporum f. sp. niveum and treated by Trichoderma helicum recorded the highest values of growth parameters, similarly for T. erinaceum on melon plants inoculated by F. solani f. sp. cucurbitae. Among all treatments for plants inoculated by F. oxysporum f. sp. melonis, those three bioagents T. viride, T. erinaceum, and A. flavus revealed efficiency in plant growth. Trichoderma harzianum is the best bioagents against cucurbit soil-borne pathogens. Preventive treatment represents an effective strategy. Dipping roots with bioagent fungi suspension improve a good interaction pathogen antagonist.

EVALUATION OF SOME PLANT EXTRACTS AND CHEMICAL PESTICIDES ON GARLIC THRIPS THRIPS TABACI AND ASSOCIATED VEGETATIVE GROWTH PARAMETERS IN GARLIC FIELDS

This study was conducted in Abuqurqas district Minia Governorate during in Egypt throughout 2015– 2016 garlic season to study the effect of some chemical and plant extract pesticides in controlling the thrips garlic Thrips tabaci((Thysanoptera: Thripidae) . The insecticide confidor was sprayed three times. Result showed highly significant effect at intervals (1days, 3days, 7days and 10 days). While, the other insecticides were low significantly effective against the pest as compared to control. In addition, higher values of vegetative growth parameters were obtained when plants received Confider, Selecron and Decis respectively. The lowest values of fresh weight were recorded after most of treatments and were insignificantly compared with control.

Productivity and profitability of legume-cereal forages under different planting ratio and nitrogen fertilization

To study the effect of different planting ratios and nitrogen levels on yields and economics of fodder maize and cowpea, an experiment was laid out in split plot arrangement with three intercropping row ratios of maize: cowpea (1: 1, 2: 1 and 1: 2) in main plot and five nitrogen levels (0, 30, 60, 90 and 120 kg N/ha) in sub plot with three replication. The maize and cowpea planted under 1: 2 ratio showed maximum values of growth parameters (i.e. plant height, number of leaves, leaf length, leaf width, stem girth, number of branches and leaf to stem ratio), nutrient content and their uptake (N and P) over 1: 1 and 2: 1 ratio. The significantly higher value aforesaid growth parameters of maize were recorded with applications of 90 kg N/ha. However, cowpea showed significantly higher value of growth parameters upto 60 kg N/ha. The highest total DMY (141.22 q/ha) and maize DMY (122.92 q/ha), net return ( 57089.42) and B: C ratio (1.72) were observed under 2: 1 intercropping ratio. However, in case of cowpea, 1: 2 intercropping ratio resulted in highest DMY (33.25 q/ha). Among fertility levels the significantly maximum total DMY, maize DMY and farm profitability, nutrient content and uptake by maize were observed with 120 kg N/ha. However, cowpea showed significantly increase in DMY up to 30 kg N/ha only. The 1: 2 intercropping ratio resulted in 5.60 and 6.70% higher soil N and 4.00 and 2.57% higher soil P over 1: 1 and 2: 1 intercropping ratios. The use of 120 kg N/ha resulted 2.0, 6.6, 9.3 and 20.2% improvement in soil N over 0, 30, 60 and 90 kg N/ha, respectively. Thus it can be concluded that to realize higher productivity and farm profitability their planting 2: 1 ratios with use of 120 and 60 kg N/ha, respectively is a viable option and may quite helpful in sustain the performance of livestock in terms of health and milk production.

A comparative study of growth: different body weight trajectories in three species of the genus Eublepharis and their hybrids

An extensive research effort is devoted to the evolution of life-histories and processes underlying the variation in adult body weight; however, in this regard, some animal taxa remain neglected. Here we report rates and timing of growth recorded in two wild-derived populations of a model lizard species, Eublepharis macularius (M, W), other two related species, i.e., E. angramainyu (A) and E. sp. (D), and their between-species hybrids. We detected clear differences among the examined species/populations, which can be interpreted in the terms of “fast – slow” continuum of life-history strategies. The mean asymptotic body size was the highest in A and further decreased in the following order: M, W, and D. In contrast, the growth rate showed an opposite pattern. Counter-intuitively, the largest species exhibited the slowest growth rates. The final body size was determined mainly by the inflexion point. This parameter reflecting the duration of exponential growth increased with mean asymptotic body size and easily overcompensated the effect of decreasing growth rates in larger species. Compared to the parental species, the F1 and backcross hybrids exhibited intermediate values of growth parameters. Thus, except for the case of the F2 hybrid of MxA, we failed to detect deleterious effects of hybridization in these animals with temperature sex determination.

Impact of Foliar, Mineral Fertilization and some Plant Activators on Cucumber Growth and Productivity

Two field experiments were conducted during 2016 and 2017 summer seasons in a private farm near El-Mahalla El-Kobra, El-Gharbia governrate to evaluate the effect of three NPK levels (100, 75 and 50 percentage of NPK recommended dose) and NPK foliar application (with or without foliar NPK spraying) with three foliar activators applications (chitosan, moringa leaf extract and lithovit) as well as tap water as a control and their interactions on vegetative growth characters, ion percentage, yield and its quality of cucumber plants cv. prince. Obtained data revealed that 100 % of recommended NPK (120 kg N, 50 kg P2O5, 100 kg K2O/fed.) and foliar application with NPK at 3 g/l combined to foliar application with chitosan at 3 g/l gave the highest values of yield and its components i.e. (number of fruits, fruit yield/ plant, early and total yield/fed.), while 75% NPK of recommended dose (90 kg N, 37.5 kg P2O5, 75 kg K2O/fed.) plus NPK foliar application with spraying moringa leaf extract at 10 ml/l gave the highest values of vegetative growth parameters i.e. (number of leaves/plant, shoot fresh and dry weight, plant height), also chitosan at 3 g/l combined with foliar NPK and 75% of NPK recommended dose as soil application gave superiority in N, P and K percentage in cucumber leaves, in addition, total sugar, TSS and total chlorophyll in cucumber fruits. Thus, it can be recommended that use 75% NPK from recommended dose plus foliar application NPK and foliar spray with moringa leaf extract applications to decrease mineral fertilization which reflected on reducing production costs and mitigate the environmental pollution and protect the human health.

Description of the growth of Blue tilapia (Steindachner, 1864) in Oreochromis aureus in the Tigris River south of Baghdad

This study was conducted in the Tigris River south of Baghdad in the period from July 2016 to June 2017. During this period, 236 blue tilapia blue was harvested using various fishing tools (nets, sieves and stoves). With total lengths ranging from 35 to 279 mm and with total weights from 11.6 to 387.79 g. The water temperature was 8.5 to 31c˚ and the air temperature was between 9.2 - 35.1c˚ and the pH of 7.2 - 8.2 was suitable for the growth and survival of fish in the Tigris River. The largest annual increase in length during the first year of the blue tilapia was 82.56 mm and 37.00%, and it is not subject to me because it was fluctuating between rise and fall. She lives until the seventh year of her life and decreases with age. The relationship between the total length and the total weight was found to b (1.76) and is not symmetrical. The values ​​of growth parameters k 0.06 and to (-0.18) yr, respectively, and the maximum expected length of L∞ was 293.68 mm. The condition factor was 1.79 and indicated a good health and nutrition status of fish

Effect of Propaquizafop and Imazethapyr Mixture on Weed Dynamics, Growth, Yield and Economics of Soybean [Glycine max (L.) Merill

The results of field experiments conducted during Kharif seasons of 2013 and 2014 to adjudge the efficacy of propaquizafop and imazethapyr mixture (tank mixed) to combat weeds and impact the growth and yield of soybean are reported. The treatments consisted of four doses of propaquizafop + imazethapyr mixture (47 + 70, 50 + 75, 53 + 80 and 56 + 85g ha−1), sole application of propaquizafop (75 g ha−1) and imazethapyr (100 g ha−1) as early post-emergence and pendimethalin (1000 g ha−1) as pre-emergence, hand weeding(HW) twice at 20 and 40 d after sowing(DAS)and weedy check. The dry matter accumulation for all the recorded weed flora was found the lowest in combined application of herbicides rather than their sole application, being higher under propaquizafop + imazethapyr mixture applied at 53 + 80 g ha−1 or higher rate (56 + 85 g ha−1). Higher values of growth parameters (plant height, branches plant−1, nodules plant−1), yield attributes (pods plant−1, seeds pod−1, seed index), yield and B: C ratio were recorded under propaquizafop + imazethapyr mixture applied at 56 + 85 g ha−1 followed by 53 + 80 g ha−1 which were comparable to hand weeding twice at 20 and 40 DAS.

Improving Growth of Lebbeck and Chinaberry Transplants for Drought by Using Organic Amendments

Field experiment was carried out at the Experimental Farm of the Salinity and Alkalinity laboratory, Sabaheia- Alexandria, to quantify growth, biomass and chemical composition on responses of lebbeck and chinaberry to three levels of drought stress and three organic amendments after two successive seasons of 2015 and 2016. The results indicated that well-watered treatment had the higher values of height growth, stem diameter, leaves number, shoots dry weight, shoots: roots (S: R) ratio, total chlorophyll and total carotenoides. On the other hand, severe treatment (50% field capacity) resulted in the highest values of roots dry weight, proline and total phenols contents for both tree species. Compost was better to enhance the growth parameters of lebbeck while, humate was the better to increase growth parameters of chinaberry. Total chlorophyll and total carotenoides of the two species were enhanced by adding humate. The interaction results indicated that the highest values of growth parameters of lebbeck resulted from compost combined with moderate or well-watered treatments. While humic acid combined with well-watered or moderate treatments were the best for growth of chinaberry seedlings.

Using Moringa oleifera extract as biostimulant enhancing the growth, yield and nutrients accumulation of pea plants

ABSTRACTTrials on the potentials of moringa for organic farming have shown that leaves contain substances, which when sprayed on crops enhance growth and yield of crops. Moringa is nutrient-rich plant with combination of antioxidants, amino acids, nutrients, potassium (K), calcium (Ca), iron (Fe) and vitamins. A field experiment was conducted on a sandy soil conditions at Salhia El-gdida county, El-Sharkia Government, Egypt during the growth seasons of 2014/2015 to study the effect of moringa leaves extract (MLE) at different rates on yield and nutrient accumulation of pea plants (pisum sativum L.). Foliar spraying of MLE was done in three equal doses at 25, 35 and 45 after planting at a rate of 0%, 1%, 2%, 3% and 4%. All treatments of MLE significantly increased fresh pods yield, shoot and seeds dry weight, biological yield, 100 seed weight, yield efficiency, protein content and nutrient accumulation as compared to control. The highest values of photosynthetic pigments, growth parameters and nutrient accumulation of plants were obtained with 4% of MLE. Also, the highest percentage increase in fresh pods yield and protein content of 82.5% and 45%, respectively, was recorded from the treatment of 4% MLE.

Impact of Magnetized Water Irrigation, Soil Mineral Fertilization and Foliar Spraying with Nanomaterial on Potato Plants.

The present work was conducted at the Experimental Station Farm, Faculty of Agriculture, Mansoura University, Egypt, during the two successive winter (critucal) cultivation of 2015/2016 and 2016/2017 to investigate the impact of irrigation water (normal water - magnetized water), levels of soil mineral fertilizers and foliar spraying with nano-material (without - Lithovit) as well as their interactions on growth, yield, chemical composition and quality of potato cv. Spunta. Obtained data cleared that irrigation with magnetized water produced the highest significant values of plant growth, chlorophylls, yield, chemical composition and quality parameters except nitrate (NO3) and nitrite (NO2) contents compared to normal water treatments. Meanwhile, fertilized potato plants with 100% NPK from recommended dose gave the maximum values of all studied parameters, except nitrate (NO3) and nitrite (NO2) concentrations which increased compared to other treatments. Moreover, foliar spraying with Lithovit as a nono material increased significantly all studied characters, except nitrate and nitrite, which gave the lowest values in both seasons. It could be recommended that irrigation potato plants with magnetized water, 50% NPK from the recommended dose and foliar spraying with Lithovit (1g/L) in order to maximize productivity, quality parameters and limiting the environmental pollution comparing to plant irrigated with normal water + 100% NPK.

Impact of Plant Density and Humic Acid Application on Yield, Yield Components and Nutrient Uptakes of Sunflower (Helianthus annuus L.) Grown in a Newly Reclaimed Soil

A study was carried out as field experiments at Demo experimental station, Fayoum district in summer seasons 2015 and 2016 to investigate the effects of plant density and humic acid soil application on oil content, nutrient uptakes, vegetative growth and yield of sunflower (Helianthus annuus L.) plants. A split plot layout within a randomized completely blocks design with 3 replications were used. Three treatments of plant density i.e., D1=47,619 plant/ha-1 (0.7x0.3 m), D2=71,428 plant/ha-1 (0.7x0.2 m) and D3= 95,238 plant/ha-1 (0.7x0.15 m) were placed in the main plots. The subplot treatments were 5 levels (0.0, 1.25, 2.5, 3.75 and 5 kg ha-1) of humic acid. The results indicated that the plant density D1 gave the highest values of plant height, number of leaves plant-1, leaf, stem and head dry weights plant-1 and seed yield plant-1. However, the plant density D2 recorded the highest seed yield ha-1. Both plant densities (D1) and (D2) surpassed D3 concerning on values of leaf and seed (N, P, K, Mg, Mn, Zn and Fe) uptakes. Soil addition of humic acid at rate of 5 kg ha-1 significantly produced the highest values of growth parameters, yield, its components as well as oil content and nutrient uptakes in both seasons. The highest sunflower seed yield was obtained when plant density was 71.428 plant ha-1 (D2) and treated with 5 kg ha-1 of humic acid as a soil application.

Assessment of biological effects in Plantago major L. Seed progeny in the zone of impact from a Copper Smelter

The quality of seed progeny was studied in Plantago major from populations growing for a long time in the gradient of chemical pollution around the Karabash Copper Smelter (KCS). The results showed that the range of variation in seed germination and seedling survival rates was wider in background than in impact populations. The lowest values of growth parameters (the number of seedlings with a true leaf and root length) were recorded in the sample from the most polluted plot. Challenging exposure to toxic elements (seed germination in soils from polluted plots) was found to stimulate, to different extents, the rate of leaf formation and suppress root growth in the seedlings. It cannot be stated from these results that the adaptive potential of plants grown in the zone of impact from the KCS is altered, compared to that in other samples. Evaluation of the prooxidant and antioxidant status of seedlings from this zone revealed a decrease in superoxide dismutase and catalase activities (to 60 and 33% of background values, respectively) and an increase in peroxidase activity (to 122%). The prooxidant status of seedlings in samples from the KCS zone was found to be increased, except for the sample from the most polluted plot.

Culture technique of endangered Notopterus chitala (Hamilton, 1822) with Oreochromis niloticus for domestication in pond habitat

An experiment was carried out for a period of 180 days (1stApril to 30 th September) in 2015 to find out a the suitable culture technique of Notopterus chitala (Hamilton-Buchanan, 1882) in pond habitats located at the Hatchery Complex, Department of Fisheries, University of Rajshahi. The experiment was conducted under 3 treatments (T1: only feed used, T2: feed and Tilapia, T3: only Tilapia used) each with 3 replications. Mean stocking weight of Notopterus chitala was 21.4±0.27 g for all treatments. Basal fertilization was same for all the treatments (cowdung: 1235 kg/ha, urea: 50 kg/ha, TSP: 50 kg/ha). Feed (8-10% of body weight) and fertilized (weekly with cowdung 1000 kg/ha,) based farming was followed in all treatments. Mean value of water temperature varied from 32.53±0.04°C (T2) to 32.57±0.03°C (T1) to transparency 32.34±0.68 (T2) cm to 33.87±0.37cm (T3), Dissolved Oxygen 4.76±0.04mg/l (T3) to 4.91±0.04 mg/1 (T1), pH 7.62±0.03 (T1) to 7.70±0.05 (T2) , alkalinity 127.04±1.4 mg/l (T2) to 131.46±0.92 mg/1 (T3),respectively. The mean value of different growth parameters varied with the followings-final weight 380±.88 g (T1) to 645 ± .57g (T2), weight gain 358.6 ± .14g (T1) to 623.60± .02g (T2), SGR (% bwd-1) 3.84±.02 (T1) to 4.54± .01(T2).The survival rate between 93.33±6.67 % (T1) to 100 ± 0.00 %(T2), and the total production of Notopterus chitala was found 1593.2±2.46(T2) Kg/ha/180 days which was significantly higher than that of others treatments 938.6 ±31.29 (T1), 1133.7±62.98 (T3) respectively. The growth parameters are significantly different among the treatments. The total production of Tilapia was observed 1790.18±0.7(T2) kg/ha/180 days which was higher than 1584.9±0.39(T3).The combined production (Chital + Tilapia) of fish was obtained 3383.2±2.86(T2) which was higher than those of 938.6 ±31.29(T1) and 2718.6±50.1(T3) respectively.The total income raised from 394200±6.36BDT/ha (T1) to 736548±24.04 BDT/ha (T2), net profit 209180±12.49BDT/ha (T1) to 468258±17.63BDT/ha (T2) and CBR 1.13±.01 (T1) to 1.75±.02 (T2) respectively and all growth parameters were significantly (P<0.05) different among the treatments. Treatment T2 (feed and Tilapia used) was proved best in terms of production and economics of N. chitala culture in pond habitats based on experimental results.Bangladesh J. Sci. Ind. Res. 52(3), 187-194, 2017

Effect of Foliar Application with Bentonite on Growth and Productivity of Egyptian Cotton

Effect of Foliar Application with Bentonite on Growth and Productivity of Egyptian Cotton

Growth evaluation of all male prawn and tilapia in ponds of northern Bangladesh

Freshwater aquaculture is by far the most ancient aquatic living resource production system known in the world. An experiment was conducted to evaluate the growth performance of prawn and tilapia (male) under different sex (male and female) contribution of prawn in polyculture ponds for a period of four months from September 2010 to December 2010. The experiment was designed with 3 treatments like T1 (All male Tilapia– 4938/ha + All male Prawn 19,753/ha), T2 (All male Tilapia – 4938 / ha + All female Prawn 19,753/ha) and T3 (All male Tilapia – 4938/ decimal + all male Prawn 19876 + all female prawn 19876/ha), each with 2 replications. The mean stocking weight of prawn was 2.87 g and that of tilapia was 37.36 g. Total stocking density of prawn and tilapia (24,691/ha), basal fertilization (Cowdung 2470kg/ha, Urea 50kg/ha and TSP 50kg/ha), periodic fertilization (Cowdung 50kg/ha/day, urea 1.25kg/ha/day and TSP 1.25kg/ha/day) and feeding regime (diet containing 30% protein level at the rate of 2-5% of prawn and fish body weight twice daily) were same for all the treatments. Water quality parameters (water temperature, transparency, dissolved oxygen, pH, NH3-N and alkalinity) were monitored fortnightly and the growth parameters were monitored monthly. Mean values of water quality parameters were found within the suitable range. Treatment T1 varied more significantly (P<0.05) than that of others for the mean values of growth parameters (final weight, weight gain, SGR, survival rate and yield) of prawn and tilapia.Asian J. Med. Biol. Res. June 2017, 3(2): 198-204