000			03940nab|a22004217a|4500
999			_c60245 _d60237
001			60245
003			MX-TxCIM
005			20240919020916.0
008			190310s2019||||ne |||p|op||||00||0|eng|d
022			_a01671987
024	8		_ahttps://doi.org/10.1016/j.still.2019.02.016
040			_aMX-TxCIM
041			_aeng
100	1		_91486 _aParihar, C.M.
245	1		_aDependence of temperature sensitivity of soil organic carbon decomposition on nutrient management options under conservation agriculture in a sub-tropical Inceptisol
260			_bElsevier, _c2019. _aAmsterdam, Netherlands :
500			_aPeer review
520			_aAssessment of temperature sensitivity of soil organic carbon (SOC) mineralization from soils of long-term precision conservation agriculture (CA) plots is essential to forecast soil C dynamics. Under CA, varying quantity of inorganic nutrient application had differential impact on SOC. At the same time study of SOC mineralization at different simulated temperatures is important as global climate change affects C-cycle of an agro-ecosystem. To assess the impact of tillage and nutrient management on SOC build-up, a long-term study (five year old) with 3-tillage practices [ZT-zero tillage; PB-permanent beds, & CT-conventional tillage] in main plot and 4-nutrient management strategies [unfertilized, farmer fertilizer practice-FFP, recommended fertilizers-Ad-hoc and a site specific nutrient management-SSNM] in sub-plot in a maize-wheat-mungbean system was chosen. To measure the build-up and thermal sensitivity of SOC, soil samples from 3- depths (0?7.5, 7.5?15 and 15?30 cm) were collected. The kinetics of C-mineralisation was studied through laboratory incubation at 3-temperatures (27, 32 and 37 °C) for 90 days. The PB/ZT and SSNM had significantly higher SOC compared with CT and unfertilized plots, respectively. Although the cumulative C mineralization after 90-days of incubation followed the trend of SOC content among the treatments, while decay rates of SOC mineralization showed somewhat different trend. In all the tillage treatments the percentage of SOC mineralised ranged between 3.3?5.8% at 27 °C, 5.2?8.1% at 32 °C and 7.3?10.9% at 37 °C. At higher temperature, higher SOC decay rates were observed under CT and unfertilized plots compared with PB/ZT and SSNM plots, respectively. The SOC from lower soil depth in CT and unfertilized plots was more temperature sensitive (Q 10 = 4.03 and 4.89, respectively) compared to those under CA-based PB/ZT (Q 10 = 2.63?2.82) and SSNM (Q 10 = 2.15) based balanced nutrition, respectively. The SOC in lower soil depth (7.5?15 and 15?30 cm) is 1.3 and 2.1 times more temperature sensitive respectively than surface soil depth of 0?7.5 cm soil depth. Higher proportion of less labile SOC under CT and unfertilized plots might be the reason for higher temperature sensitivity. In the inevitable and impending global climate change scenario, we might lose a sizeable amount of sequestered C, which is otherwise stable at present ambient temperature.
546			_aText in English
650		7	_2AGROVOC _93022 _aSoil organic matter
650		7	_2AGROVOC _92619 _aConservation agriculture
650		7	_2AGROVOC _92601 _aCarbon
650		7	_2AGROVOC _97940 _aTemperature
700	1		_aSingh, A.K. _91493
700	1		_aJat, S.L. _96059
700	1		_aGhosh, A. _98605
700	1		_aDey, A. _98606
700	0		_aHari S. Nayak _98233
700	1		_aParihar M.D. _91490
700	1		_aMahala, D.M. _97650
700	1		_aYadav, R.K. _94058
700	1		_aRai, V. _98607
700	1		_aSatayanaryana, T. _98608
700	1		_aJat, M.L. _gFormerly Sustainable Intensification Program _gFormerly Sustainable Agrifood Systems _8INT3072 _9889
773	0		_tSoil and Tillage Research _gv. 190, p. 50-60 _dElsevier, 2019 _x01671987
856	4		_uhttp://libcatalog.cimmyt.org/Download/cis/60245.pdf _yAccess only for CIMMYT Staff
942			_cJA _n0 _2ddc