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LONG TERM EFFECT OF INTEGRATED NUTRIENT MANAGEMENT ON SOIL QUALITY AND CROP PRODUCTIVITY UNDER SORGHUM-WHEAT CROPPING SEQUENCE IN INCEPTISOL

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Title LONG TERM EFFECT OF INTEGRATED NUTRIENT MANAGEMENT ON SOIL QUALITY AND CROP PRODUCTIVITY UNDER SORGHUM-WHEAT CROPPING SEQUENCE IN INCEPTISOL
 
Creator DNYANESHWAR, MALI
 
Contributor Katkar, Dr. R.N.
Jadhao, Shri. S.D.
Saoji, Prof. B.V.
 
Subject null
 
Description Green revolution in the late sixties gave tremendous boost to the
agricultural production in India. It has been realized that, the increase in
production achieved in the post green revolution period was at the cost of soil
health. During the era of green revolution, introduction of high yielding
varieties, extension of irrigated areas, use of high analysis NPK fertilizers and
increase in cropping intensity propelled India towards self-sufficiency of food
production. The production of major crops increased three to four fold
between 1966-67 and 1996-97. The performance of Indian ag riculture has not
been satisfactory for the last 10 years. The food grains production has been
hovering around 200-210 million tonnes since 1996-97. A similar situation is
being observed in many other non-food grain crops also.
The present investigation was carried out to study the long-term effect
of integrated nutrient management on soil quality and crop productivity under
sorghum-wheat cropping sequence. The 26""' and 27""' cycle of the long-term
experiment initiated during 1984-85 on the lnceptisol at the Research Farm,
Integrated Farming System Research, Dr. PDKV, Akola was studied. The
objectives were to evaluate the soil quality as influenced by long term use of
only chemical fertilizers and their conjunctive use with organics including its
effect on nutrient uptake, nutrient balance, susta inability yield index and also
to identify soil quality indicators under the long term intensive cropping
system.
The treatments comprised of unfertilized control, chemical fertilizers
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alone and their combinations wiill organics viz. FYM, wheat straw and
leucaena loppings and farmers practice in randomised block design with four
replications. The soil and plant samples were analysed after each crop during
2009-10 and 2010-11 . The Principal Component Analysis was carried out,
minimum data set identified and soil quality index was computed.
The long term use of organics viz. FYM, wheat straw and green
manuring with leucaena loppings in conjunction with chemical fertilizers
recorded improvement in physical, chemical and biological properties resulting
into enhancement in soil quality. The use of only chemical ferti lizers without
organics for a long term period caused nutrient mining and deterioration in soil
physical properties. Application of FYM (50%N) alongwith chemical fertilizers
over a long-term showed highest soil quality index as well as sustainability yield
index. However, wheat straw and green manuring in conjunction with chemical
fertilizers although improved the soi l quality over a long term did not sustain the
yields under cereal-cereal cropping system.
The Sustainability Yield Index for sorghum (0.498) and wheat (0.264) were
higher under integrated nutrient management involving use of chemical
fertilizers with FYM as compared to only chemical fertilizers. The lowest
sustainability yield index (0.050) noticed in control with no manure, no fertilizer
plot than all the other treatments. Application of 50% N through FYM in
conjunction with chemical fertilizers not only had highest soi l quality index but
also the promising practice from the view of sustainability maintaining crop
yields year after year under intensive cropping system. Continuous cropping
with the use of only chemical fertilizers without addition of organics showed
depletion of micronutrients and sulphur.
The predominant soil quality indicators most influenced by the
management practices were identified as hydraulic conductivity, organic carbon
and dehydrogenase activity. The declining trend of soil available potassium
under only chemical fertilizers indicated mining of soil potassium under
continuous cropping. The bulk density values of less than 1.40 Mg m·3
,
hydraulic conductivity more than 1.00 em hr""1 and mean weight diameter more
than 1.00 mm appears to be minimum thresholds indicating base line values for
deciding management practices to be used for enhancing soil quality.
 
Date 2018-10-17T10:11:33Z
2018-10-17T10:11:33Z
2012
 
Type Thesis
 
Identifier DNYANESHWAR VISHNU MALl(2012), LONG TERM EFFECT OF INTEGRATED NUTRIENT MANAGEMENT ON SOIL QUALITY AND CROP PRODUCTIVITY UNDER SORGHUM-WHEAT CROPPING SEQUENCE IN INCEPTISOL, DEPARTMENT OF SOIL SCIENCE AND AGRICULTURAL CHEMISTRY, DR. PANJABRAO DESHMUKH KRISHI VIDYAPEETH, KRISHINAGAR P.O., AKOLA, PhD, 2012, 189p
http://krishikosh.egranth.ac.in/handle/1/5810081706
 
Language en
 
Format application/pdf
 
Publisher Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra.