Effect of LongTerm Manuring and Fertilization on Soil Carbon and Nitrogen Forms under Rainfed Conditions
Loading...
Date
2023-11-08
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Sher-e-Kashmir University of Agricultural Sciences & Technology of Jammu
Abstract
A study was carried out on a pre-existing field laid out at ACRA, Rakh Dhiansar, in randomized block design with ten treatments replicated thrice. The treatments comprised of T1- Control; T2-100% RDF of NPK; T3-50% RDF of NPK; T4-50% N (crop residue);T5-50% N( FYM),T6-50% NPK + 50% N ( crop residues), T7-50% NPK + 50% N (FYM), T8-(FYM) @ 10 tha-1,T9- 100% NPK + ZnSO4 @ 20 kgha-1, andT10- Farmer’s method (FYM @ 4 tha-1+ 40 kg ureaha-1). Soil samples were collected from each treatment at 0-5, 5-15, and 15-30 cm soil depth at the end of the 25th cropping cycle.
The results revealed significant increase in available nitrogen, phosphorus, potassium, sulphur, and cation exchange capacity with combined application of (FYM) and inorganic fertilizer (T7). The application of (FYM) alone recorded the highest mean value for total nitrogen content (7.75 g kg-1), organic nitrogen (7.67 g kg-1), and SMBN (33.61 mg kg-1) in the 0-5 cm layer. However, the highest values of ammonical nitrogen (51.10 mg kg-1) and nitrate nitrogen (42.47 mg kg-1)were recorded at 0-5 cm soil depth in treatments containing 50% (FYM)in combination with 50% NPK and were found to be insignificant in the sub-surface layer. The significant build-up in soil fertility in terms of total organic carbon, soil organic carbon, labile carbon and SMBC accumulation, was observed in plots treated with FYM @ 10 t ha-1with the corresponding values of (12.75 g kg-1), (5.80 g kg-1), (0.62 g kg-1) and (177.63 g kg-1), in the 0-5 cm soil depth. This was confirmed by the carbon management index, which significantly increased with the addition of (FYM). Overall, organic manure application along with chemical fertilizers could improve soil carbon and nitrogen levels under rainfed conditions.
Description
Keywords
Citation
. Kour, K-2023. Effect of Long Term Manuring and Fertilization on Soil Carbon and Nitrogen Forms under Rainfed Conditions.