Rapeseed

About: Rapeseed is a research topic. Over the lifetime, 2945 publications have been published within this topic receiving 51790 citations. The topic is also known as: Brassica napus & rape.

Effect of salinity stress on plant fresh weight and nutrient composition of some Canola ( Brassica napus L.) cultivars

Abstract: Soil salinity is a major limitation to crop production in many areas of the world. A pot experiment was carried out with rapeseed cultivars in order to investigate the effects of salinity stress on plant development and nutrient composition. For the salinity studies, 150 mM NaCl concentration was applied to12 rapseed cultivars (Marinca, Kosa, Spok, Semu DNK207 NA, Tower, Liraspa, Star, Tobin, Helios, Semu 209/81, Regent and Lirawell) under the greenhouse conditions. All the cultivars were harvested after 45 days from planting. Green plants parts were weighted. Harvested rapeseed plants were separated into root, shoot and leaf parts for nutrient (K + , Na + , K + /Na + , Ca 2+ and Cl - ) analysis. As shown in this study, salinity stress affected negatively all the canola cultivars investigated. Generally, salinity reduced the green parts’ weight. K + , Ca 2+ and K + /Na + contents in plants decreased by salt stress, but Na + and Cl - content in the roots, shoots and leaves of all the cultivars significantly increased. In the salt treatment, the K + and Ca 2+ concentrations were the highest in the leaf samples as compared to root and shoot samples. Furthermore, the highest concentration of Na + and Cl - was observed in the leaf and shoot. Under salinity, Regent and Lirawell cultivars retained the highest K + and Ca 2+ content in leaves, with respect to the K + content. The effect of NaCl treatment on the canola cultivars’ growth was not considerable. Key words : Canola cultivars, green plant parts, nutrient content, salt stress.

Polymorphic behavior of some fully hydrogenated oils and their mixtures with liquid oil

Abstract: Fully hydrogenated soybean oil, beef fat, rapeseed oil, a rapeseed, palm and soybean oil blend, cottonseed oil and palm oil were characterized by fatty acid composition, glyceride carbon number and partial glyceride content, as well as melting and crystallization properties. The latter were established by differential scanning calorimetry. Polymorphic behavior was analyzed by X-ray diffraction of the products in the flake or granulated form and when freshly crystallized from a melt. The hard fats were dissolved in canola oil at levels of 20, 50 and 80% and crystallized from the melt. Palm oil had the lowest crystallization temperature and the lowest melting temperature; rapessed had the highest crystallization temperature and soybean the highest melting temperature. All of the hard fats crystallized initially in the =00 form. When diluted with canola oil, only palm oil was able to maintain β′ stability.

Effects of Source and Rate of Nitrogen Fertilizer on Yield, Yield Components and Quality of Winter Rapeseed (Brassica napus L.)

Abstract: Winter rapeseed (Brassica napus L.) has potential to become an alternate oilseed crop both for edible oil production and energy agriculture (biofuel production) for Turkey. This study was conducted to determine the effect of year, N sources and doses on the yield and quality traits of winter rapeseed in a cereal system in calcareous soils over two seasons, 2000-2001 and 2001-2002, in Central Anatolia. Three N sources, ammonium sulfate, ammonium nitrate and urea, were applied as hand broadcast on the soil surface at five doses (0, 50, 100, 150, and 200 kg N ha -1 ). The traits investigated were plant height, number of branches and pods per plant, number of seed per pod, thousand seed weight, seed yield, oil and protein content. There were significantly effects on seed yield, oil and protein content, and other yield components due to N sources and rates. In general, ammonium sulfate and urea gave higher seed yield than ammonium nitrate. Mean values of both seasons indicated that 100 and 150 kg N ha -1 rate increased significantly yield and quality traits with regard to other N treatments. The present results highlight the practical importance of adequate N fertilization and true N source in seed yield in winter rapeseed and suggest that ammonium sulfate at 150 kg N ha -1 will be about adequate to meet crop N requirements.

Comparative study of calorific value of rapeseed, soybean, jatropha curcas and crambe biodiesel

Abstract: Biodiesel is a mixture of esters of short chain alcohols, produced as an alternative fuel for mineral diesel substitution. It is originated from renewable sources (fats and oils) and is less pollutants. But for its implementation, it is necessary to analyze some important quality parameters. A very important fuel`s feature is the calorific value, which represents the amount of heat transferred into the chamber during the combustion and indicates the available energy in fuel. The calorific value is obtained experimentally using a calorimetric bomb. The higher the calorific value, the higher is the yield of the fuel. The aim of this study is to determine the calorific value of rapeseed, soybean, jatropha curcas and crambe biodiesel using a calorimetric bomb. The results were associated with the ethyl ester composition of each biodiesel. The crambe biodiesel shows the highest calorific value (∆ H= 40564 J g ) influenced by the high amount of long chain ethyl ester originated from behenic acid (C22:0) that composes 57.2% of crambe oil. The rapeseed, soybean and jatropha curcas biodiesel that exhibit approximately the same amount of long chain ethyl ester showed calorific values near to ∆H= 39450 J g .