Modification in growth, biomass and yield of radish under supplemental UV-B at different NPK levels.
Growth, biomass, yield and quality characteristics of radish (Raphanus sativus L. var. Pusa Himani) were investigated under supplemental UV-B (sUV-B; 280-320 nm; +7.2 kJ m(-2) d(-1)) radiation at varying levels of soil NPK. Combinations of NPK were recommended, 1.5 times NPK, 1.5 times N and 1.5 times K. sUV-B radiation negatively affected the growth and economic yield with more reductions at 1.5 times recommended NPK, N and K compared to recommended NPK. Total biomass remained unaffected in plants at recommended NPK under sUV-B radiation. At 1.5 times NPK and N more partitioning of biomass to shoot led to reduction in root shoot ratio and consequently yield under sUV-B. Nutrients in edible part declined maximally at 1.5 times recommended K under sUV-B. The study suggests that higher than recommended NPK makes radish plants more sensitive to sUV-B in terms of yield by allocating less photosynthates towards roots compared to shoots.
Laboratory of Air Pollution and Global Climate Change, Department of Botany, Banaras Hindu University, Varanasi-221005, India.
Suruchi
S
Singh
Rima
R
Kumari
Madhoolika
M
Agrawal
S B
SB
Agrawal
D018533:Biomass; D005308:Fertilizers / Q000032:analysis*; D009584:Nitrogen / Q000032:analysis / Q000378:metabolism*; D010710:Phosphates / Q000032:analysis / Q000378:metabolism*; D018517:Plant Roots / Q000254:growth & development; D011188:Potassium / Q000032:analysis / Q000378:metabolism*; D031224:Raphanus / Q000254:growth & development / Q000378:metabolism / Q000528:radiation effects*; D012987:Soil / Q000737:chemistry; D012988:Soil Microbiology; D014466:Ultraviolet Rays
D005308:Fertilizers; D010710:Phosphates; D012987:Soil; D009584:Nitrogen; D011188:Potassium