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Effect of Long-Term Use of Tillage, Crop Residue and N Application on Phosphorus Fractions in Soil under Sorghum (Sorghum vulgare) (L.)-castor system (Ricinus Communis) in Rainfed Alfisol Soils

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Title Effect of Long-Term Use of Tillage, Crop Residue and N Application on Phosphorus Fractions in Soil under Sorghum (Sorghum vulgare) (L.)-castor system (Ricinus Communis) in Rainfed Alfisol Soils
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Creator K.L. Sharma
A.K. Indoria
K. Srinivas
K. Sammi Reddy
G. Ravindra Charry
Munna Lal
Ch. Srinivasarao
D. Suma Chandrika
M. Osman
J.V.N.S. Prasad
S.S. Balloli
G. Pratibha
Brajendra Parmar
V.Girija Veni
Pushpanjali
M. Vasavi
P. Haindavi
D. Lakshmi Aruna Gayatri
 
Subject Not Available
 
Description Not Available
A long-term field experiment was conducted at Hayathnagar Research Farm (HRF) of ICAR-Central Research Institute of Dryland Agriculture with the objectives to assess the effect of soil management practices viz tillage, residue application and N levels on soil phosphorus fractions, their interrelationships among themselves, impact on soil P availability pool, crop yields and P uptake. The results of the study clearly indicated that the long-term use of tillage, application of residues and N levels had a significant effect on all the P fractions in soils, except that water-soluble phosphorus (WSP) was not significantly influenced by the tillage practices. The Tillage x Residue x Nitrogen (T × R × N) significantly influenced the reductant soluble phosphorus (RSP) and total phosphorus (TP); however, the remaining P fractions were not influenced significantly. Among the combination of soil management treatments, conventional tillage (CT)+ Gliricidia loppings @ 2 tha−1 (GL) + N level @ 90 kg ha−1 (N90) (CTGLN90) gave the highest sorghum grain yield (1432 kg ha−1) and P uptake (14.20 kg P ha−1). Among the treatment combinations, the order of superiority of treatments in terms of castor yield and P uptake was: CT+ sorghum stover @ 2t ha−1 (SS) + N90 (CTSSN90) (1788 kg ha−1, 11.94 kg P ha−1) > Minimum Tillage (MT) + sorghum stove @2 t ha−1 (SS) + N level @ 90 kg ha−1 (N90) (MTSSN90) (1761 kg ha−1, 14.24 kg P ha−1), respectively. Significant coefficients of multiple determination obtained from regression equations developed between sorghum crop yield and P fractions (R2 = 0.726, p = .05) and sorghum P uptake and P fractions (R2 = 0.620, p = .05) highlighted the importance of these fractions in influencing the crop yield and P uptake. Similarly, castor yield (R2 = 0.748, p = .05) and P uptake (R2 = 0.783) were significantly influenced by the P fractions. The results of the present study will be useful in understanding the effect of soil management practices on the status of P fractions and their contribution toward P uptake and crop yields.
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Date 2024-01-09T12:39:40Z
2024-01-09T12:39:40Z
2019-11-26
 
Type Research Paper
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/81210
 
Language English
 
Relation Not Available;
 
Publisher Not Available