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Long–term manuring and fertilization influences soil inorganic phosphorus transformation vis-a-vis Rice yield in Rice-Wheat cropping system

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Title Long–term manuring and fertilization influences soil inorganic phosphorus transformation vis-a-vis Rice yield in Rice-Wheat cropping system
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Creator Tarik Mitran, Pabitra Kumar Mani, Nirmalendu Basak, Debasis Mazumder & Manabendra Roy
 
Subject fertilization; inorganic phosphorus; long-term; manuring; rice–wheat cropping system
 
Description Not Available
A study on the rice–wheat cropping system was conducted at Bidhan Chandra
Krishi Viswavidyalaya, West Bengal, India, to assess the effects of long-term
manuring and fertilization on transformation of the inorganic phosphorus (P) fraction
in soil after 22 years of the crop cycle. Soil samples were collected after
Kharif from seven treated plots having different types of organic amendments like
farm yard manure, paddy straw and green manuring with 50% substitution of
nitrogen levels in rice crop only. The result showed that the yield trend of rice
was maintained due to the buildup of P from various organic inputs. Although
cultivation for 22 years without adding any fertilizer caused a significant decrease
in almost all the forms of P viz. avail-P, saloid P, iron phosphorus fraction (Fe–P),
aluminum phosphorus fraction (Al–P), calcium phosphorus fraction (Ca–P) and
total P in control. Partial substitution of inorganic fertilizer N (50%) with organics,
however, caused a significant increase in almost all the P fractions in soil over
the control. The relative abundance of all the fractions of inorganic P irrespective
of treatments was as follows: Fe–P > reductant soluble P fraction > occluded P >
Al–P > Ca–P > saloid P. Saloid and Fe–P were the dominating fractions responsible
for 92% variation of available P and total P levels, respectively.
Not Available
 
Date 2019-12-05T05:14:20Z
2019-12-05T05:14:20Z
2016-01-01
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/27725
 
Language English
 
Relation Not Available;
 
Publisher Not Available