THE INFLUENCE OF AGRO-ECOLOGICAL CONDITIONS ON COMMON PEA YIELD PUBLISHEDEva Candráková, Nora POLLÁKOVÁ, M. MACÁK
Abstract: A field stationary experiment was carried out during years 2005 - 2007 at the Experimental base of the Slovak University of Agriculture in Dolná Malanta. The long-term average annual temperature of the site is 9.7° C and 16.6° C during the vegetation period. The average rainfall is 561 mm, including 323 mm during the vegetation period. Agro-climatic sub-area is characterized as very dry. Soil subtype was classified as Haplic Luvisol on proluvial sediments with loess. Main aim of this study was the evaluation of yield and yield components (the number of plants per unit area, number of pods per plant, number of seeds in the pod, and thousand of kernels weight) of common pea variety Dunaj grown under different soil tillage and fertilization treatments. Tillage treatments were as follows: O1 - conventional tillage (to the depth of 0.25 m), O2 - reduced tillage (to the depth of 0.18 m), O3 - minimized tillage (to the depth of 0.10 m). The fertilization treatments: 0 - no fertilization; PH – balance fertilization to design yield; PZ – balance fertilization with incorporation of forecrop residues after harvest. Nutrients were added on the base of balance method according to nutrient content in soil on yield level of 3 t ha -1 pea seeds. From the results achieved in this study we can conclude that pea yield was statistically highly significantly affected by the climatic conditions during years (the highest yield 4.48 t ha -1 was reached in 2006), significantly by soil tillage (3.76 t ha -1 in O3 treatment) and fertilization (3.85 t ha -1 in PZ treatment). The lowest yield (2.82 t ha -1 ) was reached during the growing season in year 2007, characteristic by the lack of moisture and high temperatures. The proportion of seeds on overall pea phytomass was around 50 %, resulting in the ratio of seeds to straw 1:1.
common pea, soil cultivation, fertilization, seeds yield