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Fasakhodi Maliheh Taheri Abed-Elmdoust Amirreza Mirvaghefi Alireza Hosseini Seyed Vali Tavabe Kamran Rezaei 《Aquaculture International》2021,29(6):2793-2804
Aquaculture International - There is developing importance in the biomedical use of seaweeds such as brown algae, mostly due to their contents of bioactive substances. In the present study,... 相似文献
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Kamran Afsahi Marziyeh Nazari Heshmat Omidi Farid Shekari Abdol Amir Bostani 《Journal of plant nutrition》2020,43(8):1070-1079
AbstractZinc (Zn) as a microelement plays a salient role in the vital processes of plants such as metabolism and nutrition. This experimental study was conducted in the research field of Agriculture Faculty, Zanjan University using two genotypes of canola as main factor (Okapi and Tassilo) and zinc fertilizer application method in 7 levels including control, foliar spraying (2, 3.5, and 5?g/L) at the beginning of flowering and soil application (25, 50, and 75?kg/ha) were considered as sub-plot factor. The results showed that the application of zinc significantly increased the chlorophyll content as compared to control treatment. The highest chlorophyll content was observed in foliar spraying of 3.5 and 5?g/L zinc in Okapi cultivar. While, the highest value of RWC content resulted only with spraying 5?g/L of zinc. The result showed that zinc foliar of 5?g/L obtained the highest oil and seed yields and seed yield components. In addition, the highest qualitative seed traits (oil and protein content and zinc content in seed and plant) resulted with spraying 5?g/L of zinc. Also, Okapi cultivar had more quantitative and qualitative yields than Tassilo cultivar. The foliar spray of 5?g/L Zn can be recommended to increase the quantity and quality seed yield of canola. 相似文献
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Irshad Ahmad Bashir Ahmad Shahzad Ali Han Qing Fang Tiening Liu Muhammad Kamran Yang Wu Mati Ur Rahman Shah Faisal 《Russian Agricultural Sciences》2016,42(3-4):218-223
The objective of this study was to evaluate the effects of organic and inorganic fertilizers on yield and quality of sugar beet genotypes (Beta vulgaris L.). Therefore a field trial was carried out at New Developmental Farm of The University Agriculture, Peshawar, Pakistan during winter 2012–13. The field experiment was layout in randomized complete block design with split plot arrangement having three replications. Fertilizers treatments (control, higo organic plus (composted manure, it contains N 2%, P 3%, K 3%, organic matter 40%, organic carbon 11%, Zn 145 mg kg–1, Cu 56 mg kg–1, Fe 380 mg kg–1 and Mg 228 mg kg–1), maxicrop sea gold (extract of sea weeds i.e., Sargasssum, Laminara Polysaccharide and Ascophyllum Nodosum), farm yard manure, NP (90: 60 kg ha–1), NP (120: 90 kg ha–1) and NP (150: 120 kg ha–1) were allotted to main plots while genotypes (Sandrina, Serenada and Kawe Terma) to the sub plots. Farm yard manure (10 t ha–1) and higo organic Plus (5 t ha–1) was incorporated in the soil before seed bed preparation. Maxicrop sea gold (5 lit ha–1) was sprayed after the emergence of the crop. All phosphorus was applied @ of 60, 90 and 120 kg ha–1 at the time of sowing while nitrogen @ of 90, 120 and 150 kg ha–1 in two splits/3 of the dose was applied at the time of sowing while the remaing 1/3 of the dose was applied before earthen up. Plots treated with application of NP ratio 120: 90 kg ha–1 produced maximum beet yield (76.4 t ha–1), sugar yield (11.1 t ha–1), Pol (polarizable sugar) percentage (14.67%) and more economic return (Rs.234 Thousand ha–1) as compared to control plots. Sugar beet genotype Serenada had significantly produced maximum beet yield (55.5 t ha–1), sugar yield (7.9 t ha–1), pol (polarizable sugar) percentage (14.60%), brix percentage (14.60%) and more economic return (158) as compared to other genotypes. It was concluded from the above results that sugar beet genotype Serenada treated with NP ratio 120: 90 kg ha–1 for improved sugar beet productivity and quality therefore it is recommended for general practice in agro-climatic conditions of Peshawar valley. 相似文献
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Our cognitive abilities in performing tasks are influenced by experienced competition/conflict between behavioral choices. To determine the role of the anterior cingulate cortex (ACC) and dorsolateral prefrontal cortex (DLPFC) in the conflict detection-resolution process, we conducted complementary lesion and single-cell recording studies in monkeys that were resolving a conflict between two rules. We observed conflict-induced behavioral adjustment that persisted after lesions within the ACC but disappeared after lesions within the DLPFC. In the DLPFC, activity was modulated in some cells by the current conflict level and in other cells by the conflict experienced in the previous trial. These results show that the DLPFC, but not the ACC, is essential for the conflict-induced behavioral adjustment and suggest that encoding and maintenance of information about experienced conflict is mediated by the DLPFC. 相似文献
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Ali Akbar Moosavi Samireh Mansouri Maryam Zahedifar Mahmood Reza Sadikhani 《Archives of Agronomy and Soil Science》2013,59(12):1747-1764
A greenhouse experiment (5 × 2 × 2 factorial arranged in randomized-complete-design with three replicates) was conducted to assess the combined effects of nickel (Ni) and drought stress on growth and yield parameters of canola (Brassica napus L. var. Talaye) grown on two calcareous soils of loamy and sandy clay textures. Treatments consisted of five Ni levels (0, 0.05, 0.1, 0.5 and 1 mg Ni kg?1 soil) and two levels of water status 100% and 60% field capacity (FC and 0.6FC, respectively). Growth parameters and yield components of plants decreased at drought-stress conditions. Almost all of the studied growth/yield parameters of canola grown on loamy soil were significantly more than those of the sandy clay soil, probably due to the increased capability of loamy soil for supplying the plant water/nutrient requirements. Nickel could positively affect some of the mean growth and yield parameters (e.g., grain yield) over both of the water status conditions. Nevertheless, some of the traits not only increased by Ni fertilization but also decreased compared to that of the control. The positive responses of canola was observed with higher amounts of applied Ni in the sandy clay soil than in loamy soil, e.g., the maximum grain yields of canola grown on loamy and sandy clay soils were obtained with applications of 0.5 and 1 mg Ni kg?1, respectively. Generally, results demonstrated that Ni could not mitigate the negative effects of drought stress on canola growth or yield components. 相似文献
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Ali Bagherzadeh Mohammad Reza Mansouri Daneshvar 《Frontiers of Agriculture in China》2011,5(4):504-513
Land evaluation is the process of predicting land use potential on the basis of its attributes. In the present study, the
physical land suitability evaluation approach was investigated for specific cereal crops including irrigated wheat, barley,
grain maize and sorghum, based on FAO land evaluation frameworks (FAO, 1976, 1983, 1985) and the proposed method by Sys et
al. (1991) at Mashhad Plain, Northeast Iran. Twenty eight soil profiles were studied on seven land units by a precise soil
survey and their morphological and physicochemical properties were determined. Climatic and land qualities/characteristics
of four cereal crops were determined using the tables of crop requirements developed by Sys et al. (1993). An interpolation
function was used to map values to scores in terms of land qualities/characteristics for land utilization types and the evaluation
was carried out according to parametric approaches. The interpolation technique using GIS functions helped in managing the
spatial data and visualizing the results. Our results indicated that the most important limiting factors for irrigated wheat
and barley cultivations are soil physical and fertility/chemical properties, while the production of irrigated grain maize
and sorghum is mainly limited by climatic conditions at Mashhad Plain. It was shown that all land units suitable for irrigated
wheat cultivation overlap with that of barley, whereas the same limiting factors resulted in the overlapping of the irrigated
grain maize production area with that of sorghum. The results of the physical land suitability evaluation for specific cereal
crops indicated the priority of irrigated barley and wheat cultivations over irrigated grain maize and sorghum at the study
area. 相似文献
49.
This paper presents a stochastic optimization model to determine the optimal number of acres of hay a farm should harvest for their own horses’ consumption, as well as how much hay to purchase and sell to maximize the total profit of the farm. This research is motivated by horse farmers who must make yearly decisions concerning the management of feeding horses. These decisions are affected by the cost to grow their own hay, the cost to buy hay, the cost associated with selling hay, and the stochastic nature of crop yield due to different weather conditions. The uncertainty of weather conditions is included in the mathematical model by including random variables in the model constraints. Optimal policies are obtained for a real world case study provided by a Kentucky horse farmer by applying chance constrained programming method. A sensitivity analysis is performed to show the effectiveness of the approach. 相似文献
50.
Interactions of different sodium and potassium concentrations on Macrobrachium rosenbergii (de Man) offspring quality parameters 
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下载免费PDF全文 Kamran Rezaei Tavabe Gholamreza Rafiee Michael Frinsko Harry Daniels 《Aquaculture Research》2015,46(11):2615-2627
The present study evaluated various sodium and potassium concentrations in hatchery water to determine which proportions would be optimal for Macrobrachium rosenbergii larviculture. Using a closed RAS system (60‐L), experiments were conducted in two stages. In the first stage, larval quality parameters were compared among triplicate treatments of sodium (2000, 3000, 4000 and 5000 mg L?1) and potassium (100, 150, 200 and 250 mg L?1). During the second stage, these same parameters were compared from interactions of the two best concentrations determined in the first stage. Initial larval density was fixed at 100 larvae L?1 and larval quality parameters such as larval stage index (LSI), larval condition index (LCI), larvae dry weight, survival (%), LC50‐24 h for formalin stress and time of the first postlarvae (PL) appearance were measured. Results showed that during the early larval period time LSI, LCI and survival parameters were affected only by potassium and the interaction with sodium was not significant. At a later period of the larval development, interactions between both sodium and potassium were measurable for LSI (P < 0.05) while the interactions on LCI and survival were not significant. Measurable differences among the combined treatments 4000 mg L?1 sodium and 150 mg L?1 potassium resulted in the best performance for M. rosenbergii larviculture. This concentration also provided the highest final survival to PL metamorphosis (40.6 ± 2.5%) which was at least 10% higher than the other treatments. 相似文献