| Autor: |
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 |
| Předmět: |
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| Zdroj: |
Communications in Soil Science & Plant Analysis; 2020, Vol. 51 Issue 1, p1-13, 13p |
| Abstrakt: |
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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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