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Formation of alfalfa plant generative and vegetative organs during nitrogen deficit in the nutrient medium



Formation of alfalfa plant generative and vegetative organs during nitrogen deficit in the nutrient medium



Fiziologiya na Rasteniyata 7(2): 62-69



The effect of temporary N deficit at the individual phases of development on the formation of alfalfa plant organs and N uptake was studied under the conditions of a vegetation pot experiment. The temporary exclusion of N from the nutrient medium during the first 3 phases of plant development reduces the quantity of dry matter. After temporary N starvation alfalfa plants restore the formation of dry matter in the vegetative organs more quickly than in the generative organs. Exclusion of N from the nutrient medium reduces its percentage involvement on the leaves only during the 2 phases of plant development. Due to the disturbance of the growth processes during temporary N starvation the plants take up and accumulate smaller quantities both of this element and of the remaining elements: P, K, Ca and Mg. No disturbance in the balance and ratio of these elements in alfalfa plants was assessed.

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