The influence of nitrogen fertilization on protein yield and nutrient uptake in different triticale genotypes

2007 ◽  
Vol 35 (2) ◽  
pp. 253-256
Author(s):  
Milan Biberdžić ◽  
Ivica Đalović ◽  
Aleksandar Paunović ◽  
Ilija Komljenović
2004 ◽  
Vol 3 (4) ◽  
pp. 268-272 ◽  
Author(s):  
K. Mesut Cimrin . ◽  
Mehmet Ali Bozkurt . ◽  
Nazim Sekeroglu .

2015 ◽  
Vol 154 ◽  
pp. 208-215 ◽  
Author(s):  
Sandra Leanne Dillard ◽  
Charles Wesley Wood ◽  
Brenda Hall Wood ◽  
Yucheng Feng ◽  
Walter Frank Owsley ◽  
...  

1974 ◽  
Vol 10 (3) ◽  
pp. 219-224 ◽  
Author(s):  
R. C. Dalal

SUMMARYIntercropping maize with pigeon peas, in a mixed stand or in alternate rows, significantly reduced the grain yield of maize but not of pigeon peas. Maize grown alone produced the maximum grain yield ha.−1 week−1, whereas maize and pigeon peas grown in alternate rows produced maximum proteins ha.−1 week−1 and absorbed the maximum amounts of potassium, calcium and magnesium. Pigeon peas grown in a pure stand produced minimum grain yield and proteins ha.−1 week−1, and absorbed minimum amounts of nutrients. The problem of intercropping maize with pigeon peas under optimum nitrogen fertilization is discussed.


1958 ◽  
Vol 50 (5) ◽  
pp. 241-243 ◽  
Author(s):  
Wray L. Winterlin ◽  
T. M. McCalla ◽  
R. E. Luebs

2019 ◽  
Vol 111 (4) ◽  
pp. 2038-2046 ◽  
Author(s):  
Ramdeo Seepaul ◽  
Jim Marois ◽  
Ian M. Small ◽  
Sheeja George ◽  
David L. Wright

1972 ◽  
Vol 8 (3) ◽  
pp. 187-194 ◽  
Author(s):  
Ramon S. de la Pena ◽  
Donald L. Plucknett

SUMMARYThe effects of nitrogen fertilization on growth, nutrient uptake and yields of upland and lowland taro were studied on the island of Kauai, applying o, 280, 560 and 1120 kg./ha. N. Nitrogen concentrations of upland and lowland taro leaves were significantly correlated with yields, although regression analysis showed that per cent N in both blades and petioles decreased with age. Higher yields were obtained from the lowland than from the upland crop, regardless of amounts of N fertilizer applied. The highest yield obtained from lowland taro was at 1120 kg./ha. N harvested at fifteen months (57·6 tons/ha.) and from upland taro the highest yield was obtained at 560 kg./ha. N harvested also at fifteen months (25·5 tons/ha.).


1991 ◽  
Vol 63 (4) ◽  
pp. 255-285 ◽  
Author(s):  
Kari Jokinen

Competition and yield advantage in barley varietal mixtures and in barley-oats mixtures were investigated. The trials were based on replacement series, but in a few cases the overall density of the stand was varied on the basis of an addition series. Both models of competition, one based on the de Wit model and the other upon a linear regression model, agreed as to which component was the dominant and which was the subordinate in the mixture. The competition coefficients from regression analyses depicted competition between components better in a dense than in a sparse stand. The competitive ability of a genotype did not depend directly upon individual characters of the genotype, such as rate of initial development, earliness, culm height, tillering capacity or grain yield in monoculture (adaptation), A good combination of characters from the viewpoint of competition was provided by the barley cv. Arra with its rapid initial development and rapid culm growth (earliness), the variety being dominant irrespective of number of components in the mixture, stand density, level of nitrogen fertilization or growing season. This suggests that competitive relations and distribution of resources within a mixture are determined at an early stage in the growing period. In other cases the competitive ability of a genotype varied from one environment to another with the competitive relations between components being inconsistent. The dominance of an aggressor usually increased with increasing nitrogen fertilization especially when the total density of the stand was high. As a rule, competition affected all the components of yield with the kernel weight being least affected. The grain yield of varietal mixtures did not differ from the yield of the highest yielding component grown alone, i.e., mixtures did not over yield. The relative yield total of varietal mixtures was higher at low (RYT > 1) than at optimal densities (RYT =1). Also the relative yield total was higher under conditions where the nitrogen fertilization was not optimal. The results of a varietal trial repeated during three successive years indicated that the relative yield total of a given mixture varied from one growing season to another, fluctuating around unity. Thus highly adapted barley varieties appear to compete for the same resources, and the grain yield advantage of such mixtures is marginal. The results of the barley-oats mixture trials revealed that the mixture may over yield. The relative yield totals of barley-oats mixtures were usually equal to or greater than unity the latter suggesting that the mixtures of barley and oats may use resources more efficiently than monocultures, and some grain yield advantage could be achieved with such mixtures. The protein yield of the barley-oats mixtures did not differ from the yield of the highest yielding component grown alone. The ratio of actual and expected protein yield and the relative protein yield total were usually slightly greater than one. The grain yields of mixtures were not consistently more stable than monocultures as determined by the coefficient of variation.


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