Effect of Phosphorus and Sulphur on Productivity of Summer Green Gram [Vigna radiata (L.) Wilczek]
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Date
2012
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MPUAT, Udaipur
Abstract
ABSTRACT
The experiment entitled ‘‘Effect of Phosphorus and Sulphur on Productivity of Summer Green Gram [Vigna radiata (L.) Wilczek]’’ was conducted at Krishi Vigyan Kendra, Dungarpur during summer season, 2010 and 2011.
The treatments consisted of four phosphorus levels (0, 20, 40 and 60 kg P2O5 ha-1) and four sulphur levels (0, 15, 30 and 45 kg S ha-1) thereby making sixteen treatment combinations. The experiment was laid out in factorial randomized block design. The sixteen treatment combinations were replicated four times.
The result revealed that application of 60 kg P2O5 ha-1 recorded significantly higher plant height by 9.47, 8.78 and 3.19 per cent at 30 DAS and 14.09, 7.24 and 5.57 per cent at harvest over control, 20 and 40 kg P2O5 ha-1, respectively on pooled basis. Application of 60 kg P2O5 ha-1 recorded 1.32 and 8.84 g dry matter plant-1 at 30 DAS and at harvest, which represented significant increase over all preceding P levels on pooled basis. Similarly LAI and chlorophyll content at flower initiation stage increased significantly and progressively upto 60 kg P2O5 ha-1 accounting 41.95 and 31.44 per cent higher LAI and chlorophyll content over control, respectively on pooled basis. Significantly higher branches plant-1, pods plant-1, seeds plant-1and 1000 seed weight (3.59, 14.83, 130.43 and 34.67 g) were obtain with 60 kg P2O5 ha-1 which were 33.46, 32.53, 17.49 and 8.48 per cent more than control. Significant higher grain, stover and biological yields were produced by 60 kg P2O5 ha-1 which represented 14.93, 14.08 and 14.39 per cent increase over control (745.16, 1244.94 and 1990.09 kg ha-1, respectively). Protein content and its yield were also significantly enhanced upto 60 kg P2O5 ha-1 which tended 6.33 and 22.24 per cent over control (21.01% and 136.49 kg ha-1), respectively. Application of phosphorus upto 60 kg P2O5 ha-1 showed progressive and significantly increased N, P, K and S contents in seed and stover except K and S content in stover which registered significant upto 40 kg P2O5 ha-1.Similarly, significantly higher uptake of total N, P, K and S by summer green gram with increasing levels of phosphorus upto 60 kg P2O5 ha-1 which accounting 28.82, 26.99, 21.76 and 22.58 per cent over control (44.34, 5.89, 18.42 and 1.86 kg ha-1), respectively. Significantly higher nutrient status of soil after crop harvest due to progressively application P upto 60 kg P2O5 ha-1 in respect to available N and P where as available K recorded significantly higher upto 40 kg P2O5 ha-1 during second year and available S upto 20 kg P2O5 ha-1 on pooled basis.Net returns to the tune of ` 16370 were realized with 60 kg P2O5 ha-1 which showed significant results over preceding levels. The mean maximum B: C ratio (2.13) was recorded with 60 kg P2O5 ha-1 which account 3.90, 5.97 and 2.40 per cent higher over control, 20 and 40 kg P2O5 ha-1, respectively
The sulphur nutrition recorded significantly higher plant height at 30 DAS with progressive application of S up to 45 kg ha-1 to the tune of 10.54, 7.52 and 5.79 per cent over control, 15 and 30 kg S ha-1. Whereas at harvest S nutrition had no significant bearing on plant height. Application of 45 kg S ha-1 produced significantly higher dry matter accumulation at 30 DAS and at harvest on pooled basis (1.23 and 8.54 g plant-1,respectively). Similarly LAI and chlorophyll content at flower initiation stage increased significantly and progressively upto 60 kg P2O5 ha-1 accounting 22.22 and 21.99 per cent increase over control on pooled basis, respectively. Application of 45 kg S ha-1 recorded significantly higher branches plant-1, pods plant-1, seeds plant-1 and 1000 seed weight (3.39,14.33,130.96 and 34.24 g, respectively) ,which represent 23.73, 26.93, 14.56 and 7.17 per cent increase over control. Similarly, significantly higher grain, stover and biological yield were produced due to 45 kg S ha-1 which represented 14.41, 13.07 and 13.04 per cent enhancement over control (743.16, 1225.91 and 1960.03 kg ha-1, respectively). It also produced significantly higher protein content (22.47 %), protein yield (165.32 kg ha-1). Application of S upto 45 kg ha-1 resulted significantly increased N content in seed K and S content in seed and stover over all preceding S levels. Although, sulphur nutrition had no significant effect in respect to phosphorus content. The total NPK and S uptake by crop statistically more with 45 kg S ha-1 representing 18.41, 12.92, 23.75 and 115.79 per cent higher over control (45.63, 6.19, 18.36 and 1.33 kg ha-1), respectively. Application of S at 45 kg ha-1 resulted significantly higher SO4-2 status in soil after harvest the crop whereas available K significant upto 20 kg S ha-1 on pooled basis.Net returns of ` 16446 were realized through 45 kg S ha-1 which were significantly more than all preceding S levels. On pooled basis maximum B: C ratio (2.18) was recorded with 45 kg S ha-1 which account 10.66,6.34 and 5.31 per cent higher over control, 15 and 30 kg S ha-1, respectively.
Description
Studies on the Effect of Phosphorus and Sulphur on Productivity of Summer Green Gram [Vigna radiata (L.) Wilczek]
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Citation
Bairwa and Nepalia, 2012