Izvorni znanstveni članak
WATER DEFICIT ANALYSIS IN VARIOUS CROPS
I. Šimunić
K. Pandžić
Branka Ivančan Picek
M. Bogunović
S. Husnjak
Sažetak
The paper deals with water a deficit in arable soils of the Zagreb region (types: calacaric fluvisol and semigley) and for the most common agricultural crops grown (silage maize, cabbage, bell pepper, lettuce, tomato, maize, apple, etc.). Soil suitability was assessed by the FAO method. Climatological characteristics of the region, from the aspect of irrigation, were assessed using 20-year series of meteorological and pedological data, and indices of plant development stages. Reference evapotranspiration (ETo) was calculated by the Penman-Monteith method. Effective precipitation was calculated by the USBR method from the values of mean monthly average precipitation as well as from the amounts of monthly precipitation, separated by the lower quartile. Palmer’s method was used to calculate soil water balance for each crop.
The results show that different crops have different water requirements, the total water deficit depending on the amount and seasonal distribution of precipitation and on the soil hydropedological characteristics. The water deficit was calculated for each crop with respect to the long-term precipitation average as well as for droughty months, separated by the lower quartile of the precipitation amount.
It is concluded that irrigation is a necessary measure for the production of the studied crops on the said soil types in the Zagreb region.
Ključne riječi
water balance components; water deficit; crops
Hrčak ID:
18192
URI
Datum izdavanja:
20.6.2007.
Posjeta: 2.289 *