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Elucidating the Impact of Long-Term Fertilization on kharif Rice (Oryza sativa L.) Productivity and Soil Microbial Activities in Acidic Inceptisols

Indian Agricultural Research Journals

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Title Elucidating the Impact of Long-Term Fertilization on kharif Rice (Oryza sativa L.) Productivity and Soil Microbial Activities in Acidic Inceptisols
 
Creator R. Mohapatra
N. Panda
D. Sethi
S.K. Sahoo
P.K. Samant
M. Mandal
K. Kumar
 
Subject Long-term fertilization
rice productivity
soil enzyme activities
MBC
MBN
MBP
 
Description An appraisal was made in an ongoing long-term field experiment with a rice-rice cropping system followed for the last 17 years with 12 treatments and four replications having various combinations of inorganic fertilizers and organic manure. The 12 treatments were control, 100% N, 100% NP, 100% PK, 100% NPK, 150% NPK, 100% NPK + FYM@10 t ha-1,100% NPK + lime@1 t ha-1, 100% NPK + lime@1 t ha-1 + FYM@10 t ha-1, 100% NPK + Zn, 100% NPK + B +Zn, 100% NPK + S + Zn. The present investigation was conducted during the year 2021-2022. After the harvest of kharif rice, the grain (42.4 q ha-1) and straw (53.8 q ha-1) yield were recorded as highest in plots receiving an integrated package of practices of both organic (FYM) and inorganic fertilizers along with ameliorant (100% NPK+FYM @ 10 t ha-1 +lime @1 t ha-1). The relative agronomic efficiency (RAE) was calculated as the highest (209%) in the same treatment followed by an optimal dose of NPK with organics. Various soil enzyme activities like dehydrogenase (DHA), urease, phosphatase, and â-glucosidase were also estimated the highest (72.62 μg TPF g soil-1day-1, 106.40 μg NH4 +-N g-1 soil 2 hr-1, 432 μg p-nitrophenol g-1soil hr-1 and 97.98 μg p-nitrophenol g-1soil hr-1 respectively) in treatment where 100% NPK + FYM @ 10 t ha-1 + lime @1 t ha-1 was applied. A similar response was also noticed for microbial biomass carbon (MBC), microbial biomass nitrogen (MBN), and microbial biomass phosphorous (MBP) (182.86 μg C g soil-1, 139.40 μg N g soil-1, 19.78 μg P g soil-1 respectively) in the same treatment followed by an optimal dose of NPK with organics. Interestingly SOC had a significant correlation with DHA (0.928**), urease (0.925**), phosphatase (0.950**), â-glucosidase (0.853**), MBC (0.789**), MBN (0.732**) and MBP (0.790**). The soil enzymatic activities (DHA, urease, phosphatase, and â-glucosidase) were also positively correlated (R2=0.86, 0.93, 0.86, 0.77, respectively) with the total yield of rice and microbial biomass (C, N, P) was also positively correlated with SOC (R2=0.81, 0.83, 0.89, respectively).
 
Publisher Indian Society of Soil Science
 
Date 2024-06-03
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier https://epubs.icar.org.in/index.php/JISSS/article/view/152362
 
Source Journal of the Indian Society of Soil Science; Vol. 72 No. 1 (2024): Journal of the Indian Society of Soil Science; 107-118
0974-0228
0019-638X
 
Language eng
 
Relation https://epubs.icar.org.in/index.php/JISSS/article/view/152362/54714