A COMPARATIVE STUDY ON FRUIT QUALITY PARAMETERS AND YIELD OF FOUR OLIVE CULTIVARS GROWN IN SANDY SOIL

The effect of row direction (N-S, E-W), plant density (conventional and intensive) and rootstock (M9, MM106 and crab apple) on the sensitivity of 41 apple cultivars to sunburn injury was studied at 6 locations (Derecske, Kálmánáaza, Nagykutas, Nagylapos, Siófok, Tornyospálca). During the observations the cultivars had rootstock-specific properties in respect of sunburn-susceptibility. Accordingly, the injury was decreased in the order: M9, MM106 and seedling rootstocks. The differences in sensitivity depend on the canopy of trees, caused finally by the growing vigour of rootstocks. Accordingly, the highest value of sunburn injury was observed on M9 rootstock, because this rootstock has a dwarfing effect upon the scion cultivars. Thus, vegetative area of these trees grow very slowly and the foliage is not enough compact to protect the fruit from solar radiation. The size and density of the foliage increased in the order: M9, MM 106 and crab apple seedling as rootstock. Moreover, relationships were demonstrated between the diameter of upper part of the crown, the leaf area, the number of fruits per tree and the injury of sunburn. Authors categorized the cultivars in respect of values of sunburn incidence: 1. „Not sensitive", II. „Moderately sensitive" and HI. „Strongly sensitive" categories were constituted. Generally, Topaz and Gala cultivars showed low damage (or were free from symptoms), in contrast to this, Golden mutants suffered relatively much. The most sensitive cultivar was Jonica on all the three rootstocks. We searched for relationship between the fruit quality parameters and the frequency of sunburn. Significant correlation was found in the cases of fruit size and the extent of cover-colour. The latter is interpreted with the fact that the best coloured fruits are found on the periphery of crown as a consequence of more intense irradiation.

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EFFECT OF FOLIAR SPRAY WITH ZINC AND BORON ON GROWTH, YIELD AND FRUIT QUALITY OF STRAWBERRY (Fragaria × ananassa Duch cv. Camarosa) PLANTS GROWN IN SANDY SOIL

Journal of Productivity and Development ◽

10.21608/jpd.2011.42451 ◽

2011 ◽

Vol 16 (3) ◽

pp. 483-506

Keyword(s):

Fruit Quality ◽

Sandy Soil ◽

Foliar Spray ◽

Growth Yield ◽

Fragaria Ananassa

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Comparative study on African catfish (Burchell, 1822) hypophysation using ovaprim and chicken pituitary gland extract

Global Journal of Fisheries Science ◽

10.31248/gjfs2021.021 ◽

2021 ◽

Vol 3 (1) ◽

pp. 1-6

Author(s):

O. A. Babalola ◽

◽

F. A. Fakunmoju ◽

T. F. Sunnuvu ◽

B. E. Faleti ◽

...

Keyword(s):

Water Quality ◽

Comparative Study ◽

Pituitary Gland ◽

Clarias Gariepinus ◽

Latency Period ◽

Quality Parameters ◽

Water Quality Parameters ◽

African Catfish ◽

Gland Extract ◽

Significant Difference

Comparative study on African catfish hypophysation indices using ovaprim and chicken pituitary gland extract (CPGE) was carried out. Sixteen (16) African catfish brood stocks between 1100 and 2300 g in ratio 2:1 and four (4) numbers of layer birds (Gallus gallus domesticus) between 1200 and 2200 g in ratio 1:3 were used respectively. The experiment was batched into “A” and “B”. Batch ‘A’ was placed on ovaprim while batch ‘B’ was placed on CPGE. An indoor hatchery vat, measuring 0.6096 m x 1.8288 m x 0.3048 m each was used for the incubation. Digital measuring kits were used to monitor water quality parameters and measurement of the brood stocks weights independently. Brood stocks on ovaprim and CPGE treatments had the following mean hypophysation indices in these order: fecundity (11100±7690 and 17760±13863), latency period (9.53±0.54 and 9.77±0.49), fertilization percentage (94.03±5.90% and 90.6±10.11%), hatchability percentage (75.6±0.81% and79.35±10.27%), number of eggs produced (5889±657.37 and 9403.33±589.80), total number of larvae hatched (4717.33±1111.0 and 7111.33±506.64), SGR (0.67±0.31 and 1.1±0.31), and survival rate (64.81±0.71 and66.24±2.19) respectively. There was no significant difference (p = 0.05) in the mean values of fecundity, latency period, fertilization and hatchability percentages in both treatments but there was significant difference (p ≤ 0.05) in number of eggs produced and total number of larvae hatched in both treatments. The water quality parameters were within the range for induced breeding techniques and there was no significant difference (p= 0.05) in both experiments. Both ovaprim and CPGE had excellent results from the induced breeding of Clarias gariepinus and yielded good results. Therefore, CPGE could be recommended from the view point of excellent results and its availability from chicken slaughter houses as against ovaprim which are imported.

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Does propagation method affect the field performance of peach trees?

Semina Ciências Agrárias ◽

10.5433/1679-0359.2017v38n4suplp2815 ◽

2017 ◽

Vol 38 (4Supl1) ◽

pp. 2815

Author(s):

André Luiz Kulkamp de Souza ◽

Márcia Wulff Schuch ◽

Samila Silva Camargo ◽

Robson Rodrigues Pereira ◽

Edson Luiz de Souza ◽

...

Keyword(s):

Fruit Quality ◽

Field Performance ◽

Quality Parameters ◽

High Density ◽

Conventional System ◽

Hydroponic System ◽

Potential Alternative ◽

Propagation Methods ◽

Peach Trees ◽

Vegetative Bud

Worldwide, peach propagation has been performed mainly by grafting scions of desirable cultivars on rootstocks obtained from seeds. There are, however, other potential propagation methods not widely adopted due to the limited reports on the field performance of the resultant trees. This study addressed this knowledge gap and investigated the field performance of peach trees of the cultivar Maciel that were established in an orchard (5.0 m × 1.4 m spacing) in 2011. The trees were trained in a "Y" system, with seedlings from three propagation techniques: 1) Conventional System (CS) - vegetative bud grafting of the scion on the rootstock of the Okinawa cultivar obtained from seed; 2) Rootstock by Minicutting (RM) - vegetative bud grafting of the scion on the rootstock of the Okinawa cultivar obtained by minicutting in a semi-hydroponic system; 3) Self-Rooting (SR) - self-rooting of the scion in a semi-hydroponic system. The vegetative, productive, and fruit quality parameters were assessed during 2012 and 2013. The Maciel peach trees that were propagated by the SR technique were found to have similar or even superior field performance to those propagated by the CS. The RM propagation method was also found to be an important potential alternative to peach propagation, since this it combines two techniques (cutting and grafting) to reduce tree vigor, especially if the goal is high-density planting.

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