Physiology of Paluma guava plants fertilized with potassium and calcium
ABSTRACT Guava is a perennial fruit, highly preferred by the Brazilian consumer and in increasing commercial exploitation in almost all the national territory. The most required nutrients are nitrogen, followed by potassium and calcium with great participation in the growth and physiology of guava. The objective of this study was to evaluate the effects of potassium doses in the soil without and with calcium in the physiology of Paluma guava plants. The experiment was carried out in a randomized complete block design in a 5 × 2 factorial arrangement, with K2O of 0, 45, 90, 135 and 180 g plant-1 year-1, without and with 120 g plant-1 year-1 calcium from calcium nitrate. The variables analyzed were chlorophyll indices (a, b and total), chlorophyll fluorescence and gas exchange. The results were submitted to analysis of variance by the “F” test and the potassium doses were submitted to regression analysis, using SAS© software version 9.3. Guava plants fertilized with only potassium in the soil had higher photosynthetic rate, water use efficiency and instantaneous carboxylation efficiency. The addition of calcium and potassium to the soil increased chlorophyll a, b, total, variable fluorescence, maximum fluorescence, quantum efficiency, stomatal conductance, transpiration rate and internal carbon concentration in guava.
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Universidad de Tarapacá. Facultad de Ciencias Agronómicas
2018
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oai:scielo:S0718-342920180002001632019-04-04Physiology of Paluma guava plants fertilized with potassium and calciumPereira Cavalcante,Alian CássioFerreira Cavalcante,LourivalGuilherme Cavalcante,AdailzaPereira Bertino,Antonio MichaelPereira Bertino,Antonio MissiemarioFerreira,Nubia Marisa Psidium guajava chlorophyll physiological aspects ABSTRACT Guava is a perennial fruit, highly preferred by the Brazilian consumer and in increasing commercial exploitation in almost all the national territory. The most required nutrients are nitrogen, followed by potassium and calcium with great participation in the growth and physiology of guava. The objective of this study was to evaluate the effects of potassium doses in the soil without and with calcium in the physiology of Paluma guava plants. The experiment was carried out in a randomized complete block design in a 5 × 2 factorial arrangement, with K2O of 0, 45, 90, 135 and 180 g plant-1 year-1, without and with 120 g plant-1 year-1 calcium from calcium nitrate. The variables analyzed were chlorophyll indices (a, b and total), chlorophyll fluorescence and gas exchange. The results were submitted to analysis of variance by the “F” test and the potassium doses were submitted to regression analysis, using SAS© software version 9.3. Guava plants fertilized with only potassium in the soil had higher photosynthetic rate, water use efficiency and instantaneous carboxylation efficiency. The addition of calcium and potassium to the soil increased chlorophyll a, b, total, variable fluorescence, maximum fluorescence, quantum efficiency, stomatal conductance, transpiration rate and internal carbon concentration in guava.info:eu-repo/semantics/openAccessUniversidad de Tarapacá. Facultad de Ciencias AgronómicasIdesia (Arica) v.36 n.2 20182018-07-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-34292018000200163en10.4067/S0718-34292018005000503 |
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Pereira Cavalcante,Alian Cássio Ferreira Cavalcante,Lourival Guilherme Cavalcante,Adailza Pereira Bertino,Antonio Michael Pereira Bertino,Antonio Missiemario Ferreira,Nubia Marisa |
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Pereira Cavalcante,Alian Cássio Ferreira Cavalcante,Lourival Guilherme Cavalcante,Adailza Pereira Bertino,Antonio Michael Pereira Bertino,Antonio Missiemario Ferreira,Nubia Marisa Physiology of Paluma guava plants fertilized with potassium and calcium |
| author_facet |
Pereira Cavalcante,Alian Cássio Ferreira Cavalcante,Lourival Guilherme Cavalcante,Adailza Pereira Bertino,Antonio Michael Pereira Bertino,Antonio Missiemario Ferreira,Nubia Marisa |
| author_sort |
Pereira Cavalcante,Alian Cássio |
| title |
Physiology of Paluma guava plants fertilized with potassium and calcium |
| title_short |
Physiology of Paluma guava plants fertilized with potassium and calcium |
| title_full |
Physiology of Paluma guava plants fertilized with potassium and calcium |
| title_fullStr |
Physiology of Paluma guava plants fertilized with potassium and calcium |
| title_full_unstemmed |
Physiology of Paluma guava plants fertilized with potassium and calcium |
| title_sort |
physiology of paluma guava plants fertilized with potassium and calcium |
| description |
ABSTRACT Guava is a perennial fruit, highly preferred by the Brazilian consumer and in increasing commercial exploitation in almost all the national territory. The most required nutrients are nitrogen, followed by potassium and calcium with great participation in the growth and physiology of guava. The objective of this study was to evaluate the effects of potassium doses in the soil without and with calcium in the physiology of Paluma guava plants. The experiment was carried out in a randomized complete block design in a 5 × 2 factorial arrangement, with K2O of 0, 45, 90, 135 and 180 g plant-1 year-1, without and with 120 g plant-1 year-1 calcium from calcium nitrate. The variables analyzed were chlorophyll indices (a, b and total), chlorophyll fluorescence and gas exchange. The results were submitted to analysis of variance by the “F” test and the potassium doses were submitted to regression analysis, using SAS© software version 9.3. Guava plants fertilized with only potassium in the soil had higher photosynthetic rate, water use efficiency and instantaneous carboxylation efficiency. The addition of calcium and potassium to the soil increased chlorophyll a, b, total, variable fluorescence, maximum fluorescence, quantum efficiency, stomatal conductance, transpiration rate and internal carbon concentration in guava. |
| publisher |
Universidad de Tarapacá. Facultad de Ciencias Agronómicas |
| publishDate |
2018 |
| url |
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-34292018000200163 |
| work_keys_str_mv |
AT pereiracavalcantealiancassio physiologyofpalumaguavaplantsfertilizedwithpotassiumandcalcium AT ferreiracavalcantelourival physiologyofpalumaguavaplantsfertilizedwithpotassiumandcalcium AT guilhermecavalcanteadailza physiologyofpalumaguavaplantsfertilizedwithpotassiumandcalcium AT pereirabertinoantoniomichael physiologyofpalumaguavaplantsfertilizedwithpotassiumandcalcium AT pereirabertinoantoniomissiemario physiologyofpalumaguavaplantsfertilizedwithpotassiumandcalcium AT ferreiranubiamarisa physiologyofpalumaguavaplantsfertilizedwithpotassiumandcalcium |
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1755996006173900800 |