Effect of Phosphorus Sulphur and Molybdenum in Enhancing Phosphorus use Efficiency and Productivity of Soybean in a Vertisol
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Date
2013
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JNKVV
Abstract
ABSTRACT
Field experiment entitled ““Effect of Phosphorus, Sulphur and Molybdenum in enhancing Phosphorus use efficiency and productivity of soybean in a Vertisol” was conducted during Kharif 2009 at research farm of department of soil science J.N.K.V.V, Jabalpur (M.P.) to assess the effect of P and S (P0S0, P40S30, P80S60 and P120S90 kg ha-1) and Mo (0, 0.5 and 1.0 kg ha-1) levels on soybean (JS 97-52). The soybean was grown and yield parameters at 30, 60 and 90 DAS, yield, oil and nutrient N, P, K, S and Mo content in grain and stover and their uptake were estimated and post harvest available nutrients status in soil were recorded.
The application of increasing level of P, S and Mo significantly increased the plant height and dry weight per plant over control at 30, 60 and 90 DAS and stover yield over control except plant height with 0.5 kg Mo and dry weight at 60 and 90 DAS. However, the plant height at P120S90 was found significantly superior to P40S30 level at 60 and 90 DAS.The application of P80S60 and P120S90 kg ha-1 significantly increased the root nodules per plant at 45 DAS over control. The root nodule at P80S60 was found significantly superior to P40S30 level.While the application of 0.5 and 1 kg Mo ha-1 significantly increased the test weight over control.
The application of P80S60 significantly increased the grain yield, S and Mo uptake by grain of soybean over control. The maximum grain yield of 2.39 t ha-1 was observed with P80S60 kg ha-1. The application of Mo @ 1 kg ha-1 significantly increased the grain yield, N, S uptake by stover and total N and K uptake by soybean over control or 0.5 kg Mo level. However, the Mo uptake at P80S60 was found significantly superior to P40S30 or P120S90 levels.
The increasing levels of P and S significantly increased the P and K content in soybean grain and N and S content in stover and Mo content in grain and stover except K content in grain and S content in stover at P40S30 level. However, the P content in grain at P80S60 and P content in stover at P120S90 and their uptake as well as total P uptake at the same level and total K uptake were found significantly superior to P40S30. The Mo content in stover at P80S60 and P120S90 was found significant over control. The increasing level of Mo application significantly increased the P, K, S and Mo content in soybean grain and stover and their uptake except 1.0kg Mo levels for Mo content.
Increasing level of P and S significantly increased the N, P, K, and Mo uptake by grain and stover and total N and S uptake and S uptake by stover over control except N and K uptake by grain at P40S30. The total N uptake at P120S90 was found significantly superior to P40S30. Increasing levels of Mo significantly increased N, K, S and Mo uptake by grain, stover and total N uptake over control.
The increasing level of P and S decreased the P efficiency. The maximum P use efficiency of 11.31% was found at P40S30 level which was significantly reduced at P120S90 but the P use efficiency between P80S60 and P120S90 was found at par. The maximum P use efficiency of 11.35% by soybean was observed at control which was significantly reduced at 1.0 kg Mo application. The application of higher than P40S30 levels significantly decreased the available P and S.