scholarly journals Nutrient Uptake and Fruit Quality of Pummelo as Influenced by Ammonium, Potassium, Magnesium, Zinc Application

2015 ◽  
Vol 8 (1) ◽  
pp. 100
Author(s):  
Hien Huu Nguyen ◽  
Somsak Maneepong ◽  
Potjamarn Suranilpong

<p>Pummelo-growing soils in southern Thailand are usually low concentrations of potassium, calcium, magnesium and zinc; therefore, the roles of these elements are essential and their effects on nutrient uptake and fruit quality that should be considered in this area in current and future pummelo orchard. The study was carried out during 2013 to 2014 production year on a 17 year pummelo (<em>Citrus maxima</em> Merr.). The objective of the study was to examine the effects of ammonium (NH<sub>4</sub>), potassium (K), magnesium (Mg) and zinc (Zn) fertilization over the farmer practice on nutrient uptake and fruit quality. The experiment comprised of 5 treatments; apply all, not apply NH<sub>4</sub>, not apply K, not apply Mg and farmer practice. Application of fertilizer increased N, Ca and Mg concentrations in the leaves, but K and Zn concentrations in leaves decreased after application. However, their concentrations were in optimum ranges. High K/Ca, K/Mg mole ratios and low exchangeable Mg in soil positively affected on K uptake. Low Ca/Mg mole ratio and low exchangeable Ca in soil negatively affected on Ca uptake. The TSS and TSS/TA tended to decline when the treatments were not applied K-fertilizer. The fruit qualities were greater in the treatments with K/Ca, K/Mg and Ca/Mg mole ratios in soil were 0.23 to 0.27, 0.63 to 0.71 and 2.35 to 3.08, respectively. This study showed that K and Zn still required for pummelo growing in this soil.</p>

2011 ◽  
Vol 17 (1-2) ◽  
Author(s):  
P. T. Nagy ◽  
J. Nyéki ◽  
M. Soltész ◽  
T. Szabó ◽  
Z. Szabó

Effect of the foliar boron (B) application on nutrient uptake and fruit quality of tart cherry (Prunus cerasus L.) was investigated from 2008 to 2009 on mature four favourite Hungarian tart cherry cultivars like ‘Oblacsinszka’, ‘Érdi bôtermő’, ‘Újfehértói fürtös’ and ‘Petri’. Tart cherry trees grown in Eastern Hungary (Újfehértó) on an acidic sandy soil with low B content. Trees were treated with B by foliar application (0.5% B) at full bloom and untreated with B served as a control. B sprays strongly affected on B content of inflorescences. However, B sprays had no consistent effect on summer leaf B status. In our experiment stronger year effect was observed at leaf B status than flower B status. The effectiveness of early spring boron applications are limited and mostly affected the flower B status only. Moreover, treatments had inconsistent effect on studied fruit inner parameters. Monosaccharides, vitamin C and organic acid contents of sour cherry were stronger affected by cultivars than applied treatments.


1976 ◽  
Vol 56 (1) ◽  
pp. 107-110 ◽  
Author(s):  
G. W. EATON ◽  
C. N. MEEHAN

The effects of N and K fertilizer applications on yield, leaf mineral composition and fruit quality were studied at four locations in commercial cranberry plantings in experiments of 3 yr duration. Nitrogen applications at all locations increased leaf K content in the 1st and 3rd yr and decreased leaf Zn content at one location in the 2nd yr. Potassium applications increased leaf K content in all 3 yr of the experiment and decreased leaf Mg in the 2nd and 3rd yr. A significant location × N × K interaction influenced leaf K composition in the 3rd yr. Yield and fruit quality variables depended upon location but did not respond significantly to fertilizer application.


Author(s):  
Arthi Vijayan ◽  
M. V. Sriramachandrasekharan ◽  
R. Manivannan ◽  
Arumugam Shakila

Field experiment was conducted in Farmers holding located at Rajagopalapuram village under Kuttalam taluk, Mayiladuthurai district, Tamilnadu, India belonging to Padugai series (Typic ustifluvent) low in available silicon to elucidate the response of banana in terms of yield, nutrition and quality due to silicon nutrition applied through potassium silicate. The treatment consists of  T1 - NPK (RDF), T2 - NPK + Potassium silicate (FS) - 0.25%, T3- NPK + Potassium silicate (FS) - 0.50%, T4 - NPK + Potassium silicate (FS) - 1.00%, T5­ - NPK + Potassium silicate (FS) - 0.25%, T6 - NPK + Potassium silicate (FS) - 0.50%,  T7­ - NPK + Potassium silicate (FS) - 1.00%,  T8 - NPK + Potassium silicate (SA) - 50 kg ha-1, T9 - NPK + Potassium silicate (SA) - 100 kg ha-1 and T10 - NPK + Potassium silicate (SA) – 150 kg ha-1. From T2 to T4 foliar spray was done at 3rd and 5th month and from T5 to T7, foliar spray was done at 3rd, 5th and 7th month.  The test crop is Banana Var. Grand Naine. The results showed that the highest fruit yield was noticed with 50 kg Si ha-1 (96.0 t ha-1) and it reduced with Si levels.  Among foliar treatments, fruit yield increased with silicon concentrations (0.25 to 1%).  The highest fruit yield was observed with 1% Si applied at 3rd and 5th month (92.7 t ha-1). Foliar spray of 0.25 and 0.5% Si applied thrice increased the fruit yield compared to twice application at same concentration. But fruit yield declined when Si was sprayed at 1% thrice. Soil application of silicon recorded higher nutrient uptake over foliar addition. The nutrient uptake was maximum with 150 kg Si ha-1. With respect to foliar treatments, the highest uptake was noticed with foliar spray of 1% Si applied at 3rd and 5th month. Soil application of 50 kg Si ha-1 recorded the highest fruit quality viz., TSS, total sugars, reducing and non-reducing sugar and leaf protein. The highest fruit quality was noticed with foliar spray of 1% Si applied at 3rd and 5th month.  


2019 ◽  
Vol 9 (1) ◽  
pp. 80-91 ◽  
Author(s):  
Péter Tamás Nagy ◽  
◽  
Ádám Csihon ◽  
Anita Szabó

2017 ◽  
Vol 9 (12) ◽  
pp. 110 ◽  
Author(s):  
Hien Huu Nguyen ◽  
Somsak Maneepong ◽  
Potjaman Suraninpong

Potassium (K), Calcium (Ca), and Magnesium (Mg) are essential nutrients for pummelo. These nutrients are strongly antagonistic to each other. In case of excess concentration of one element, the uptake of the other elements is inhibited. This study was conducted on 17-year-old pummelo (Citrus maxima Merr.) during production year 2013 to 2015 to examine the effects of K, Ca, and Mg in soil on their uptake and fruit quality. The experiment was performed using six treatments with five replications. (NH4)2SO4, KCl, CaSO4·2H2O, and ZnSO4·7H2O were applied on top of farmer practice for the T1. (NH4)2SO4 was omitted for the T2, KCl was omitted for the T3, CaSO4·2H2O was omitted for the T4, no additional fertilizers were applied for the T5 (farmer practice), (NH4)2SO4 and CaSO4·2H2O were omitted for the T6, but 5Ca(NO3)2·NH4NO3·10H2O were applied instead. The soil pH was neutral and salinity was slight. Exchangeable K, Ca and Mg were higher than their optimum ranges. The extractable Zn in the soil and Zn in the leaves were lower than their optimum ranges. However, the problem can be solved by a single application 250 g tree-1 of ZnSO4·7H2O. Pummelo cannot uptake K to a sufficient level, even though it is abundant in the soil. High exchangeable Na and low K/Mg mole ratio in soil inhibited K uptake. Concentration of Ca in leaves corresponded to Ca and Ca/Mg mole ratio in the soil. Concentrations of Mg and K in leaves negatively correlated with each other. High Mg and Na in the soil inhibited the uptake of K and Ca, thereby causing extravagant consumptions of Mg. The fruit qualities were better in the treatment which mole ratios of K/Ca, K/Mg and Ca/Mg were 0.24 to 0.44, 0.31 to 0.44 and 0.89 to 1.29, respectively. Juice ratio of the pummelo positively correlated with the edible portion and negatively correlated with peel thickness.


Author(s):  
Md Abdul Quddus ◽  
Md Alamgir Siddiky ◽  
Md Jamal Hussain ◽  
Md Ataur Rahman ◽  
Md Razzab Ali ◽  
...  

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