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UTJECAJ SUSTAVA PROIZVODNJE I MIKORIZE NA PRINOS PORILUKA

INTENZITET PLODONOŠENJA SORATA KRASTAVACA ZA PRERADU U ZAVISNOSTI OD NAČINA UZGOJA

RESEARCH ON THE CONTROL OF MAJOR TOMATO CROP PATHOGENS AND PESTS

RESEARCH ON LOSSES OF POTATO INTENDED FOR PROCESSING DURING STORAGE

UTJECAJ RAZLIČITO PROIZVEDENIH PRESADNICA NA PRINOS BATATA [Ipomoea batatas L. (Lam.)]

ZLATNA KRUMPIROVA CISTOLIKA NEMATODA (Globodera rostochiensis Woll.) U HRVATSKOJ

POTROŠNJA VODE I MAKROELEMENATA U HIDROPONSKOM UZGOJU RAJČICE

UTJECAJ DUŠIKA I METODE GNOJIDBE NA PRINOS PAPRIKE (Capsicum annuum L. var. grossum)

RESEARCH ON SOME SEEDLING PRODUCTION PARAMETERS OF BRASSICA AND FLOWER CULTURES BRED IN FLOATING-TRAY SYSTEM

VEGETABLE SEED HYDRATION TREATMENT - POSSIBILITIES AND RISKS

DOZIRANJE VODE KORISTEĆI KOEFICIJENT NAVODNJAVANJA

ODABIR SORATA KUPUSA ZA KISELJENJE ZA ŽUPANIJSKU ROBNU MARKU "LAKTEC"

EFFECT OF ROW COVERS AND BLACK PLASTIC MULCH ON THE YIELD OF DETERMINATE TOMATOES

RESEARCH ON THE INFLUENCE OF EXPLANT TYPE AND VARIETY ON IN VITRO MULTIPLICATION IN LETTUCE

RESEARCH ON THE WATER REGIME OF TOMATOES CULTIVATED IN SOLARIUMS

UTJECAJ VOLUMENA LONČIĆA, MIKORIZE I STAROSTI PRESADNICA NA RAST I RAZVOJ PRESADNICA LUBENICA

DINAMIKA PLODONOŠENJA RAJČICE U HIDROPONSKOM UZGOJU

UTJECAJ VOLUMENA SUPSTRATA NA KOMPONENTE PRINOSA RAJČICE U HIDROPONSKOM UZGOJU

EFFECTS OF DIFFERENT NITROGEN RATES ON THE YIELD AND QUALITY OF CELERY (Apium graveolens var. L. dulce) IN TURKEY

CRVENICE ISTRE KAO SUPSTRAT ZA POVRĆARSKU PROIZVODNJU

UTJECAJ GIBERELINSKE KISELINE (GA3) NA KOMPONENTE PRINOSA ARTIČOKE

EFFECTS OF NITROGEN RATES ON THE YIELD AND QUALITY OF ENDIVE (Cichorium endivia L.) IN TURKEY

INFLUENCE OF NITROGEN FERTILIZATION ON THE BACTERIA AND VEGETABLE SEED SYMBIOSIS

SEED BACTERIZATION IN RELATION TO THE RATES AND THE DIFFERENT METHODS OF FERTILIZER APPLICATION TO VEGETABLE SEED CROPS

FERTILIZATION OF BEAN SEED CULTURES WITH MACRO- AND MICRO- ELEMENTS APPLIED ON THE SOIL AND FOLIARLY

INFLUENCE OF WHITE FLEECE ON THE YIELD FORMATION OF EARLY POTATOES

INVESTIGATION OF THE EFFECT OF MALT AND PLANT EXTRACTS ON DIFFERENT PLANT PATHOGENS

ADAPTABILNOST NEKIH NJEMAČKIH I MAĐARSKIH SORATA KRUMPIRA NA RAZLIČITIM LOKACIJAMA U HRVATSKOJ

YELLOW STICKY TRAPS AS A TOOL FOR CONTROLING CABBAGE WHITEFLY (ALEYRODES PROLETELLA L.) ON BRUSSELS SPROUTS

PREZENTIRANI I OBJAVLJENI RADOVI iZ POVRĆARSTVA
pošalji upit
Zbornik sažetaka 39. znanstvenog skupa hrvatskih agronoma 2004. godine - OPATIJA
MASS LOSSES OF POTATO INTENDED FOR PROCESSING DUE TO PHYSIOLOGICAL PROCESSES

Sorin VÂTCĂ, Gavrila MORAR
University of Agricultural Sciences and Veterinary Medicine, Faculty of Agriculture 3-5, Mănăştur Street, 3400, Cluj-Napoca, Romania (contact email: sorinv@usamvcluj.ro)

Introduction

In the context of European integration, superior capitalizations of farm product join through the priorities activity.

The processing of the potato through industrialization under form of finite product (chips, french-fries) is a superior form by capitalization which assures economical and financial advantages.

Echelon processing of potato production presume the conservation of that production for a 6-9 months, last period at the high temperature over 10oC determined by starch hydrolyze at lower temperature in simple sugars, which can modify the aspect and the taste of the final product

When the temperature is bigger then 10oC, the physiological process is accelerated (respiration - transpiration) concomitantly with those by germination causing important tubers mass wastage.

Material and methods

The research was carried out in 2001-2002 at five potato varieties: Ostara, Sante, Desiree, Roclas and Romano, on the tubers which have approximately same size (90-100 g) and same physiological age. For each variant were used 5 tubers, each tuber constituting a repetition. The determination was made monthly through sprout by weighing the sprouts and the tubers separately, mass wastage being establish through difference by one stage to another, both for sprout and for physiological process of respiration-transpiration from tubers.

For the step analysis of the processing two variants were used until by storage: one November-December after exit of the tubers from dormancy storage and another until February, to which date tubers were stored normally without sprout growth at temperature between 2 and 4oC.

Results and discussion



In the storage conditions of tuber until December for industrial processing the rhythm of mass wastage of tubers grows progressively at the beginning period for each variety with a maximum in the month January-April (table The mass wastage is very big at all varieties (38-57%), and the differences between varieties are less obvious, the biggest mass wastage being at the early and earlier varieties Ostara and Sante (57% respectively 45%).

The weight loses of the tubers extracted from storehouse in February follow the same intensity and same rhythm by decreasing in weight like those stored from November (table 2) and here the percentage of the wastage registering very high values (26-44%).

Table 1.The monthly mass wastage of potato tubers because of physiological process respiration-transpiration during the period 20.11.2001-21.06.2002 (g/tuber)

 Monthly's interval 
Variety20.11-19.1219.12-23.0123.01-20.0220.02-20.0320.03-22.0422.04-20.0520.05-21.06Total(g)
Ostara591111104757
Sante67101063345
Desiree35510103339
Roclas2469106340
Romano255885538

Table 2. Physiological process respiration-transpiration monthly's wastage in weight of potato tubers, during the period 13.02-15.07.2002 (g/tuber)

 Monthly's interval 
Variety 13.02-12.0312.03-15.0415.04-15.0515.05-13.0613.06-15.07Total(g)
Ostara57991444
Sante61373332
Desiree51055530
Roclas28108533
Romano3875326

The total mass wastages of tubers because of the physiological processes by respiration-transpiration are described in graphical representation by ascending curves almost linear, that reflect the rapidity and the gravity of the mass wastage of potato in condition of high temperatures, in the conditions which the potato tubers for industrial processing under form of chips and french-fries are exposed a long period by time at this mode of storage. The wastage are extremely big and serious at all the varieties if the storage lasts more than one month (figure 1).

Figure 1. Weighting cumulated wastages of potato tubers because of physiological processes stored at 10oC

Conclusion

The mass wastage of tubers stored 3-4 month at high temperature over 100C, because of physiologically processes are very big as compared with the wastages because of germination.

Differences of mass wastage was observed also between varieties, the early and earlier one having wastages bigger than later varieties.

Because of physiological wastage in potato mass for industrial processing it is necessary that each factory have a storehouse were the storage factors may be controlled, raw material will be stored at low temperatures, and the rise of temperature in view of industrial preservation, will be made just one moth before potato processing.

References

  1. Mureşan S., 1965, Cercetări privind repausul germinal şi pierderile prin păstrare la soiurile de cartof raionate, Analele ICCPT Fundulea, vol. XXXIII, seria C, p. 321-330

  2. Mureşan S., Donescu V., 1984, Influenţa soiului şi a metodei de depozitare asupra păstrării cartofului, Analele ICPC Braşov, vol. XIV, p. 199-206

  3. Rastovski A., Van ES A., et al., 1981, Storage of potatoes, Pudoc Wageningen, p. 99-128


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