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Changes of phosphorus fractions in saline soil amended with municipal solid waste compost and mineral fertilizers in a mustard-pearl millet cropping system

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Title Changes of phosphorus fractions in saline soil amended with municipal solid waste compost and mineral fertilizers in a mustard-pearl millet cropping system
Not Available
 
Creator M.D. Meena
B. Narjary
P. Sheoran
H.S. Jat
P.K. Joshi
Anil.R. Chinchmalatpure
Gajender Yadav
R.K. Yadav
 
Subject Municipal solid waste compost
P fractions
Phosphatase activity
 
Description Not Available
Salinity affects phosphorus (P) fractionation and its availability in soil and thereby crop growth as well as yields.
Therefore understanding of P transformation and availability in soil with use of different sources of P is crucial to
adopt appropriate P management practices for improving productivity of saline soils. A field experiment comprising
of four treatments replicated thrice was conducted for three consecutive years during 2012–15.
Treatments consisted of control (Ct), recommended dose of N-P-K fertilizers at 60-30-30 kg ha−1 (RDF-100%),
municipal solid waste compost at 16 Mg ha−1 (MSWC-16) and MSWC at 8 Mg ha−1 +RDF-50% (MSWC-
8 +RDF-50%) laid out in randomized complete block design. Among different phosphorous fractions across the
years; saloid-P (S-P), iron-P (Fe-P), calcium-P (Ca-P) and occluded-P (Occ-P) increased markedly after 2012–13
with continuous increase in subsequent years in all treatments compared to Ct. However, MSWC-8 +RDF-50%
produced significant increase in all P fractions, including Olsen-P, total-P (Pt) and inorganic-P (Pi), except S-P as
compared to RDF-100%. Whereas, all P fractions progressively declined in Ct from 2012–13 to 2015, indicating
continuous removal by mustard (Brassica juncea) and pearl millet (Pennisetumglaucum). MSWC-8 +RDF-50%
also recorded 16 and 22% higher organic-P (Po) and alkaline phosphatase activity (ALPA), respectively during
2015 over 2012–13 in corresponding treatment. Soil organic carbon (SOC) increased with RDF-100% over Ct
across the years as well as within year; however, the highest SOC (5.7 g kg−1) was observed with MSWC-
8 +RDF-50%. Mean soil salinity (electrical conductivity; EC) decreased by 38 and 25% with MSWC-8 +RDF-
50% and MSWC-16, respectively relative to Ct (4.8 dSm−1). Relatively better P availability and lower soil EC
with MSWC-8 +RDF-50% and resulted significantly higher mean (of three year) grain yield of mustard
(2.38 Mg ha−1) and pearl millet (2.44 Mg ha−1) over RDF-100%. Nevertheless, RDF-100% produced 11 and
15% higher mean grain yield of mustard and pearl millet, respectively than Ct. MSWC-8 +RDF-50% also resulted
in higher P uptake by grain of both crops as compared to RDF-100%. Our results highlighted that integrated
use of organic amendment (MSWC-8) and mineral fertilizers (RDF-50%) is beneficial option for improving
P availability and crop yields under saline conditions.
Not Available
 
Date 2019-11-29T10:05:52Z
2019-11-29T10:05:52Z
2017-01
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/25880
 
Language English
 
Relation Not Available;
 
Publisher Not Available