Mar­ius BĂRDA޹, Ali­na ȘIMON2, Florin RUSSU³, Feli­cia CHEȚAN⁴, Ovid­iu Adri­an CECLAN⁴
AGRICULTURAL RESEARCH-DEVELOPMENT STATION TURDA, 27 AGRICULTURII STREET, TURDA, 401100, ROMÂNIA1,2,3,4
Cor­re­spond­ing author e‑mail: maralys84 @ yahoo.com
Abstract: The research where exe­cut­ed in 2021, at the Tur­da Agri­cul­tur­al Devel­op­ment Research Sta­tion, using the Van­ge­lis sug­ar beet cul­ti­var and fol­lowed the influ­ence of Ter­ra­cal­co 95 soil amend­ments on phys­i­o­log­i­cal para­me­ters and pro­duc­tion at dif­fer­ent stages of crop devel­op­ment. The gran­u­lar soil amend­ment was applied in two dos­es of 500 and 1000 kg/ha-1, dur­ing the veg­e­ta­tion peri­od (begin­ning of root for­ma­tion, 75 days after emer­gence, 105 days after emer­gence and 135 days after emer­gence), quan­ti­fy­ing cer­tain phys­i­o­log­i­cal para­me­ters. Phys­i­o­log­i­cal para­me­ters were mon­i­tored with the CIRAS‑3 foliar gas ana­lyz­er, simul­ta­ne­ous­ly deter­min­ing: ref­er­ence car­bon diox­ide (CO2r- μmolm‑s-1), assim­i­la­tion (A- μmol m-2s-1), tran­spi­ra­tion rate (E- mmolm-2s-1), leaf water deficit (VPD- kPa) and leaf tem­per­a­ture (Tfr. oC). By apply­ing the gran­u­lat­ed soil amend­ment, the absorp­tion of nutri­ents is max­i­mized, in most cas­es stim­u­lat­ing the ana­lyzed phys­i­o­log­i­cal para­me­ters, obtain­ing in the vari­ant that applied 1000 kg/ha-1an increase in pro­duc­tion of over 950 kg/ha-1.
Key words: soil amend­ment, assim­i­la­tion, sug­ar beet, yield
Clasi­fi­care JEL: Q 01, Q 15, Q 16


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