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Author Petcu, Elena ♦ Georgescu, Florentina ♦ Arsintescu, Adrian ♦ Stanciu, Danil
Source CiteSeerX
Content type Text
File Format PDF
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Acid Soil ♦ Kg Ha ♦ Hydric Stress ♦ Dry Matter Accumulation ♦ Sun-flower Plant ♦ Near-neutral Soil ♦ Drought Condition ♦ Leaf Area ♦ Total Soil Water Capacity ♦ Hydric Stress Variant ♦ Albic Luvisoil ♦ Acid Soil Condition ♦ Pvc Tub ♦ Sig-nificant Decrease ♦ Fertilized Acid Soil ♦ Near Neutral Soil ♦ Soil Water Capacity ♦ Select Sunflower ♦ Cambic Chernozem Soil ♦ Ferti-lized Acid Soil ♦ Sunflower Plant
Abstract This paper presents the effect of hydric stress on Select sunflower hybrid grown under near-neutral and acid soil conditions. The experiment was conducted in green-house with sunflower plants grown in PVC tubs filled with: near- neutral soil (pH = 6.2) (I), acid soil (pH = 5.27) (II) and ferti-lized acid soil [(phosphorus (100 kg/ha), potassium (100 kg/ha) and nitrogen (150 kg/ha)] (pH = 4.83) (III). Two watering regimes were used: five replica-tions were watered daily and maintained at 70 % from TSWC (total soil water capacity) (control variant) and five replications were watered once at a couple of days no more than 40 % from TSWC (hydric stress variant). Sig-nificant decrease of leaf area, volume of root and dry matter accumulation was registered in sunflower plants under drought conditions. These modifications were more obvious under acid soil (albic luvisoil) as compared with near-neutral soil (cambic chernozem soil). The ef-fect of fertilizers applied in acid soil on sunflower growth was positively significant. As a result, the growth of sun-flower plants in this soil, under normal watering condi-tions, was higher than in the near-neutral and acid soils. For all that, under drought conditions, the leaf area, the volume of roots and dry matter accumulation of sun-flower plants in fertilized acid soil significantly decrease as compared with near-neutral soil. Key words: drought, hydric stress, soil water capacity, sun-
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Learning Resource Type Article