de Paula Betania Vahl, Sete Paula Beatriz, Berghetti Álvaro Luís Pasquetti, da Silva Lincon Oliveira Stefanello, Jung João Pedro, Nicoloso Fernando Teixeira, Mayer Newton Alex, Kulmann Matheus Severo, Brunetto Gustavo
Department of Soil Science, Center of Rural Science, Federal University of Santa Maria, Santa Maria, Brazil.
Department of Rural Engineering, Center of Agricultural Sciences, Federal University of Santa Catarina, Florianópolis, Brazil.
J Sci Food Agric. 2023 Jan 30;103(2):917-923. doi: 10.1002/jsfa.12203. Epub 2022 Oct 28.
The kinetic parameters of peach rootstock are a major factor contributing to its nitrogen (N) uptake efficiency, which directly affects the yield and quality parameters. However, the impact of grafting on N kinetic parameters is not sufficiently known as rootstocks are grafted with other scion cultivars before being transplanted to the field. The objective of this study was therefore to evaluate whether the grafting of 'Okinawa' rootstock with the scion cultivar 'Chimarrita' can alter the kinetic parameters related to N uptake.
The plants were acclimatized in Hoagland solution for 21 days and, sequentially, were tested to assess the depletion of the internal reserves at 15 and 30 days in CaSO4 solution. Morphological and physiological parameters were evaluated, and kinetic parameters were calculated. The depletion period for to reach the minimum concentration (C ) of NO - and NH + in the plant was 62 h and 56 h, respectively. The optimal time for internal reserve depletion for 'Okinawa' rootstock with and without the 'Chimarrita' scion was 30 days.
'Okinawa' rootstock grafted with 'Chimarrita' scion cultivar was more efficient in NO and NH uptake. © 2022 Society of Chemical Industry.
桃砧木的动力学参数是影响其氮吸收效率的主要因素，直接影响产量和品质参数。然而，由于砧木在移植到田间之前要与其他接穗品种进行嫁接，因此嫁接对氮动力学参数的影响尚不清楚。因此，本研究的目的是评估用接穗品种“Chimarrita”嫁接“冲绳”砧木是否会改变与氮吸收相关的动力学参数。
将植株在霍格兰溶液中驯化21天，然后依次在硫酸钙溶液中于15天和30天进行测试，以评估内部储备的消耗情况。评估形态和生理参数，并计算动力学参数。植株中NO - 和NH + 达到最低浓度（C ）的消耗期分别为62小时和56小时。有和没有“Chimarrita”接穗的“冲绳”砧木内部储备消耗的最佳时间均为30天。
用“Chimarrita”接穗品种嫁接的“冲绳”砧木对NO 和NH 的吸收效率更高。© 2022化学工业协会。
