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^: 06-12113 2012 N 6
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^: . . . . . . - , 2012; N 6. - . 36-39
^: 2012
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^: , , - , , . (60 / 60 / P2O5 2) . , , - . , - . 1 1,7-1,9 2,0-2,7 . . , , - , , . , , .

aref2 In microfield expriment on gray forest soil in the Nizhny Novgorod right bank of the Volga region the effect of the amide, ammonium, nitrate and ammonium nitrate-form nitrogen nutrition on photosynthesis, absorbing activity, biological productivity and carbon sequestration seedlings of English oak is studied. Nitrogen nutrition (60 kg/ha of each form and the background of 60 kg/ha P2O5 and K2O) caused an increase in functional activity and mineral productivity of roots. Per unit of active surface area of roots the maximum amount of nitrogen a day absorbed in the variants with NO3-, NH4+ and NH2-, and phosphorus and potassium - in the form of NH4+ form of nitrogen. Net photosynthetic productivity and efficiency of photosynthetic active radiation were highest when NO3-, NH4 + NH4NO3 forms of nitrogen were applied. The biological productivity and the deposition per 1 hectare of carbon in all forms of nitrogen increased compared with the control 1.7-1.9 and 2.0-2.7 times, respectively. No significant differences on these indicators between the variants with the nitrogen forms f were identified. Forms of NO3-, NH4+, NH2- and NH4NO3 can be used equally well, but the different effectiveness of use of nitrogen, phosphorus and potassium depending on the form allows adjusting their dosage. It has been found out that the morphological structure of the active part of the root system does not depend on the form of nitrogen, but nitrogen nutrition has led to increased functional activity and mineral productivity of roots.

^TRN: 1283800
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