Long-term effect of fertilization and manuring on soil aggregate carbon mineralization

RAJENDRA KUMAR YADAV; T J PURAKAYASTHA; NAYAN AHMED; RUMA DAS; BIDISHA CHAKRABARTY; SUNANDA BISWAS; V K SHARMA; POOJA SINGH; DAIZEE TALUKDAR; K K MOURYA; S S WALIA; ROHITASAV SINGH; V K SHUKLA; M S YADAVA; N RAVISANKAR; BASU DEVI YADAV

doi:10.56093/ijas.v91i2.111627

Authors

RAJENDRA KUMAR YADAV Agricultural University, Kota
T J PURAKAYASTHA ICAR-IARI, New Delhi
NAYAN AHMED ICAR-IARI, New Delhi
RUMA DAS ICAR-IARI, New Delhi
BIDISHA CHAKRABARTY ICAR-IARI, New Delhi
SUNANDA BISWAS ICAR-IARI, New Delhi
V K SHARMA ICAR-IARI, New Delhi
POOJA SINGH Amity Institute of Environment Sciences, Amity University, Noida, Uttar Pradesh
DAIZEE TALUKDAR ICAR-IARI, New Delhi
K K MOURYA ICAR-NBSSLUP, Regional Centre, Jorhat
S S WALIA Punjab Agricultural University, Ludhiana, Punjab
ROHITASAV SINGH GB Pant University of Agriculture and Technology, Pantnagar, Uttarakhand
V K SHUKLA Assistant Professor, Jawaharlal Nehru Krishi Viswa Vidyalaya, Jabalpur, Madhya Pradesh
M S YADAVA Birsa Agricultural University, Ranchi, Jharkhand
N RAVISANKAR ICAR-Indian Institute of Farming Systems Research, Modipuram, Uttar Pradesh
BASU DEVI YADAV SKRAU, Bikaner

https://doi.org/10.56093/ijas.v91i2.111627

Keywords:

Carbon mineralization, FYM, Macro-aggregates, Micro-aggregates, Soil organic matter, Soil organic carbon

Abstract

The 32 years impact of manuring and fertilization on carbon mineralization in macro- and micro-aggregates in major soil groups of India was studied. Mollisol, Inceptisol, Vertisol, and Alfisol samples were collected (0-15 cm soil depth) from the treatments comprising of control, 100% NPK, 50%NPK+50% N-FYM, 50%NPK+50%N-WR (Wheat residue), 50% NPK + 50% N-GM (Green manure) in the year 2015. The results showed that the mineralizable C pool was significantly higher in treatments applied with 50%NPK+50%N-GM in Mollisol and Vertisol. In Alfisol and Inceptisol, 50% NPK+50% N-FYM and 50% NPK+50% N-GM were significantly higher in both macroaggregates and micro-aggregates protected carbon. Supplementation of fertilizer N either through FYM or various green manuring crops like Sesbania (Sesbania aculeata L. in Inceptisol), greengram (Vigna radiata L. in Mollisol), sunhemp (Crotalaria juncea L. in Vertisol) and karanj (Pongamia pinnata L. in Alfisol) significantly improved mineralizable carbon pool signifying their potential contributions to nutrient cycling and thereby nutrient availability to various crops in the cropping systems in the above soils.

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