Joint International Conference on Long-term Experiments ...

� The pH decrease in the greenhouse soil can be obtained by using oligotrophic peat
(highly acid, with pH 3-4,5 and Ah of 90m.e./100g peat) or mesotrophic peat (with pH
5-5,5 and Ah of 50-60m.e./100g peat)(Rusu, 1982);
� Washing the soluble salts by irrigations, when the soil is permeable and the phreatic
layer is under the critical level. In the greenhouse soils with difficult draining where
prophylactic washings cannot be done, the low mineralized oligotrophic peat, which
contains 90-95% organic matter, is applied;
� Correcting the pH with gyps, when it exceeds the value of 8,2-8,4 and the PSA value is
greater than 10% (Rusu, 1993);
� On the soils with a low content of mineral azoth it is necessary to apply 0,25-0,50 kg
azoth for every ton of applied peat, in order to prevent a temporary immobilization of
the soluble azoth.
Depending on the applied doses and knowing the contribution of the peat’s nutritive
elements, it can be calculated the quantities of mineral fertilizers that have to be applied to
ensure the plants’ needs regarding the adaptation to different concentrations of salts.
REFERENCE
1. AVARVAREI I., VELICICA DAVIDESCU, R. MOCANU, M.GOIAN, C. CARAMETE, M. RUSU,
1997, Agrochimie, Ed. Sitech, Craiova;
2. DAVIDESCU D., VELICICA DAVIDESCU, 1992, Agrochimie horticolă, Ed.Academiei
Române, Bucureşti, 91-497;
3. MARIA APAHIDEAN, 1998, Contribuţii la stabilirea unei metode noi de cultură, “fără
sol”, a tomatelor în seră, Teză de doctorat, Cluj-Napoca;
4. R. CIOFU, NISTOR STAN, VICTOR POPESCU, PELAGHIA CHILOM, SILVIU APAHIDEAN,
ARSENIE HORGOŞ, VIOREL BERAR, KARL FRITZ LAUER, NICOLAE ATANASIU, 2004,
Tratat de legumicultură, Ed. CERES, Bucureşti, 129-136, 617-643;
5. RUSU M, V. MUNTEANU, N. METEŞ, J. JANCU, 1988, Probleme ale optimizării
agrochimice a solurilor sub influenţa măsurilor agrochimice, Analele ICCPT, vol.LVI,
261-267;
6. RUSU M., I. BOERIU, I. VLĂDUŢU, 1968, Potenţialele activităţii ale unor ioni în solurile
acide calcarizate, Stiinţa Solului, nr.4, vol.VI, 26-32;
7. RUSU M., V. MUNTEANU, I. IANCU, DANIELA DAVID, ALEXANDRA IONESCU, MARIA
FLOREA, ANA STANCIU, 1982, Cercetări privind regimul microelementelor din sol în
interacţiune cu îngrăşămintele şi amendamentele, Analele ICCPT, vol.XLIX, 121, 130;
8. RUSU M., V. MUNTEANU, I. IANCU, MARILENA MĂRGHITAŞ, S. ALB, 1993, Efectul
magneziului pe solurile modificate agrochimic, Bul. USAMV, A-H, Cluj-Napoca, 47/2,
117-124;
9. TISDALE S.L., 1993, Soil fertility and fertilizers, Macmillan Publ.Co. New-York, USA.
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