Effect of nitrogen fertilization on the yield and nutritive value of Beta vulgaris L.

The aim of this investigation was to estimate the effects of different amounts of nitrogen on the grain yield and nutritive value in two soybean genotypes (Laura and Lana). Studied varieties belong to different maturity groups (Laura is in the group I, while Lana is in the group II) and they both have reduced content of Kunitz trypsin inhibitor (KTI). Four treatments of fertilization were tested: 0 kg N ha-1, 30 kg N ha-1, 60 kg N ha-1 and 90 kg N ha-1. Field trials were carried out in dry land farming, at location Putinci, during the years 2008 and 2009. In both research years, variety Lana had higher grain yield and oil content then variety Laura. Method of nitrogen fertilization has been proved as an effective tool for increasing of grain yield and protein content in both varieties. The results of the study showed that application of 90 kg N ha-1 increased the grain yield and protein content of soybean more than application of other treatments (0, 30 and 60 kg N ha- 1). All nitrogen fertilization levels decreased the oil content.

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INFLUENCE OF VARIETY, NITROGEN FERTILIZATION, LOCATION AND YEAR OF GROWTH ON THE NUTRITIVE VALUE OF WHEAT AS DETERMINED BY RAT GROWTH

Canadian Journal of Animal Science ◽

10.4141/cjas63-004 ◽

1963 ◽

Vol 43 (1) ◽

pp. 22-30 ◽

Cited By ~ 1

Author(s):

R. S. Bhatty ◽

J. P. Bowland ◽

C. F. Bentley ◽

S. Zalik

Keyword(s):

Nitrogen Fertilization ◽

Nutritive Value ◽

Wheat Gluten ◽

Inverse Correlation ◽

Black Soil ◽

Food Utilization ◽

Mineral Supplement ◽

Wheat Varieties ◽

Rat Growth ◽

Feeding Value

The influence of variety, nitrogen fertilization, location (Grey Wooded vs. Black soil) and year of growth on the nutritive value of wheat fed to weanling rats was studied. Methods of dietary supplementation were: (a) no protein or amino acid supplement; (b) 0.6 per cent L-lysine — HCl; (c) wheat gluten to raise the total protein to 20 per cent. A complete vitamin and mineral supplement was added to all diets.Food intake was not influenced by any of the variables. Weight gains for a 2-week period were higher for rats fed Thatcher than for those fed Kenhi wheat (independent of protein content). Location and year of growth also influenced rate of gain. When lysine supplement was added, rats fed fertilized grain grew more rapidly than those fed unfertilized grain. Efficiency of food utilization followed a similar pattern to rate of gain, but varietal differences were less evident.Fifty to eighty per cent of the variation obtained in rat gain was associated with the protein or lysine content of the wheat. An inverse correlation of 0.72 was obtained between the level of protein in the wheat and the percentage of lysine in the protein. As there were no interactions between variety and the other variables, a biological assay with rats could yield useful information on the feeding value of wheat varieties, over and above information obtained from chemical analyses.

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