STUDIES ON THE EFFECT OF VARIED LEVELS OF PHOSPHORUS AND ZINC ON GROWTH AND YIELD OF AEROBIC RICE (Oryza sativa L.)
Abstract
A field experiment was conducted to study the effect of varied levels of
phosphorus and zinc on growth and yield of aerobic rice (Oryza sativa
L.)” (Cultivar rasi) during Kharif 2011 at ZARS, V. C. Farm, Mandya. Soil
of the experimental site was medium in phosphorus and sufficient in zinc
content. The experiment consisted of 3 levels of phosphorus (25, 50 and
75 kg ha-1) and 4 levels of zinc sulfate (0, 10, 20 and 30 kg ha-1) (12
treatments) laid out in Randomized Complete Block Design with three
replications. Significantly higher grain and straw yield (3024 and 4027
kg ha-1, respectively) was recorded due to application of P at 75 kg ha-1
compared to application of P at 25 kg ha-1. But it was statistically on par
with grain (2996 kg ha-1) and straw (3841 kg ha-1) yield obtained with 50
kg ha-1 P level. However, the effect of levels of zinc sulfate and interaction
on yield was not significant. The uptake of P and K by aerobic rice
increased significantly with increasing level of P application. Similarly, N,
P, K uptake by straw varied significantly due to different levels of zinc
sulfate. The interaction effect was also significant with regard to P and K
uptake by straw. Higher B:C ratio was recorded due to application of P
and ZnSO4 at 50 and 10 kg ha-1, respectively.
Description
Keywords
biological phenomena, sexual reproduction, developmental stages, surface water, wood, fruits, seasons, irrigation, water, biological development