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. Issue 1 (2nd January 2020)

• Record Type: Journal Article
• Authors: Sharma, K.L.; Indoria, A.K.; Srinivas, K.; Reddy, K. Sammi; Charry, G. Ravindra; Lal, Munna; Srinivasarao, Ch.; Chandrika, D. Suma; Osman, M.; Prasad, J.V.N.S.; Balloli, S.S.; Pratibha, G.; Parmar, Brajendra; Veni, V.Girija; Pushpanjali, Pushpanjali; Vasavi, M.; Haindavi, P.; Gayatri, D. Lakshmi Aruna
• Is Part Of: Communications in soil science and plant analysis. Volume 51:Issue 1(2020)
• Page Start: 1
• Page End: 13
• Publication Date: 2020-01-02
• Subjects: Alfisol -- available soil P -- crop yields -- P chemical fractions -- P uptake -- sorghum -- castor; Soil science -- Periodicals; Plants -- Chemical analysis -- Periodicals; Agricultural chemistry -- Periodicals; 631.405
• DOI: 10.1080/00103624.2019.1689252
• Languages: English
• ISSNs: 0010-3624

Abstract

ABSTRACT: 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 (R 2 = 0.726, p = .05) and sorghum P uptake and P fractions (R 2 = 0.620, p = .05) highlighted the importance of these fractions in influencing the crop yield and P uptake. Similarly, castor yield (R 2 = 0.748, p = .05) and P uptake (R 2 = 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.