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IMPACT OF ORGANIC NUTRIENT SOURCES AND TILLAGE ON SOIL HEALTH AND PRODUCTIVITY AND QUALITY OF MAIZE-LENTIL SYSTEM

KrishiKosh

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Title IMPACT OF ORGANIC NUTRIENT SOURCES AND TILLAGE ON SOIL HEALTH AND PRODUCTIVITY AND QUALITY OF MAIZE-LENTIL SYSTEM
 
Creator PAUL, VISHAKHA
 
Contributor Dubey, Y.P.
 
Subject ##Unable to generate tags java_v4_i12_pg954-958.pdf
Soil Science
##Unable to generate tags java_v4_i12_pg954-958.pdf
Maize
 
Description Doctoral Dissertation
An experiment was conducted at the Model Organic Farm of Department of Organic Agriculture,
CSKHPKV, Palampur during 2011-12 and 2012-13 by taking maize-lentil cropping sequence. There were two
tillage treatments i.e. conservation tillage and conventional tillage; and six different sources of organic nutrients
viz. biocompost, fortified biocompost, vermicompost, fortified vermicompost (@ 10 t ha-1 each), biodynamic
compost (7.5 t ha-1) and 60% recommended dose of fertilizers through biocompost + 20% through neem cake +
20% through biofertilizers. The fortification was done by using 5 percent cow urine and biofertilizers (N fixers and
P solubilizers). Maize was taken as main crop and all the treatments were followed for maize, whereas, lentil was
grown on the residual nutrients after maize harvest. The lentil straw was used as a residue for maize crop and
spread on surface in conservation tillage and incorporated into soil through deep tillage in conventional tillage.
Different biocomposts were prepared in both the years and analysed for the nutrient content and the best
biocompost in terms of nutrient content and C:N ratio was used in the experiment. The available and total nitrogen
and phosphorus status in the soil was studied at every 15 days interval in both the years in both the soil depths to
find out the release pattern of nitrogen and phosphorus in different treatments. The highest available and total
nitrogen and phosphorus in both the years at both depths at each interval was recorded under the treatment
combination conventional tillage + 60% recommended dose of fertilizers through biocompost + 20% through neem
cake + 20% through biofertilizers. The available and total nitrogen and phosphorus in soil were found to be higher
in the second year as compared to first year. Similarly, the nitrogen and phosphorus concentration in maize plants
at every 15 days interval was studied. The nutrient concentration was also recorded highest in the treatment
conventional tillage + 60% recommended dose of fertilizers through biocompost + 20% through neem cake + 20%
through biofertilizers in both the years. The nutrient content in soil was the lowest at 75 DAS whereas the nutrient
content in plants was the highest in 75 DAS. The maize grain and straw yield, nutrient uptake, protein content,
secondary nutrients and micronutrients in both the years were recorded higher in the treatment combination
conventional tillage + 60% recommended dose of fertilizers through biocompost + 20% through neem cake + 20%
through biofertilizers. Whereas, all these parameters in lentil grain were recorded higher in conservation tillage +
60% recommended dose of fertilizers through biocompost + 20% through neem cake + 20% through biofertilizers.
Similar trend was recorded for secondary and micronutrients for both maize and lentil. All the physical, chemical
and microbiological parameters were improved under conventional tillage. Fortified biocompost and vermicompost
improved all the soil parameters as compared to unfortified parents. The soil penetration resistance (SPR) was
recorded higher in conservation tillage as compared to conventional tillage in both maize and lentil in both the soil
depths. The moisture retention increased under conservation tillage but the moisture availability i.e. least limiting
water range (LLWR) increased under conventional tillage. The range of moisture availability increased with the
application of biocompost as compared to vermicompost. The soil penetration resistance was negatively
correlated with moisture content. All the chemical properties were significantly and positively correlated with
microbiological parameters and moisture at different tensions except moisture at -15 bars, pore space and water
holding capacity in surface soil and subsurface soil. However, the physical properties did not register a set trend
with chemical and microbiological properties on surface and subsurface soil. Whereas in the subsurface soil all
the microbial parameters were positively correlated with each other and chemical properties.
 
Date 2016-08-09T11:30:45Z
2016-08-09T11:30:45Z
2015
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/71712
 
Language en
 
Format application/pdf
 
Publisher CSK Himachal Pradesh Krishi Vishavavidyalaya, Palampur