Effect of Integrated Nutrient Management on Micronutrient Fractions and Nutrient Availability under Maize-Wheat Cropping System on Typic Haplustepts
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Date
2018
Authors
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Journal ISSN
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Publisher
MPUAT, Udaipur
Abstract
Effect of Integrated Nutrient Management on Micronutrient
Fractions and Nutrient Availability under Maize-Wheat Cropping
System on Typic Haplustepts
PRIYANKA* Dr. S.K. Sharma A field experiment entitled “Effect of Integrated Nutrient Management on
Micronutrient Fractions and Nutrient Availability under Maize-Wheat
Cropping System on Typic Haplustepts” was conducted at the Agronomy farm,
Rajasthan College of Agriculture, Udaipur during 2014-15 and 2015-16 with the
objectives to work out the effect of different INM treatments on yield, availability of
nutrient and their balance in soil, micronutrient fractions, their relationship among
themselves and with yield, nutrient uptake by maize and wheat .
The soil of the experimental field was sandy clay loam in texture, non-saline
and slightly alkaline in reaction. The experiment consisted of 12 treatment
combinations viz., T1-Control, T2-100%N, T3-100%NP, T4-100%NPK, T5-
100%NPK+Zn, T6-100%NPK+S, T7-100%NPK+Zn+S, T8-100% NPK+ Azotobacter,
T9-100% NPK+FYM 10 t ha-1, T10- FYM 10 t ha-1 +100%NPK (-NPK of FYM), T11-
150%NPK and T12-FYM 20 t ha-1 with four replications in a randomized block
design.
The maximum yield of maize and wheat in terms of grain, stover/straw was
obtained under the combined application of organic manure and fertilizer (100% NPK
+ 10 t ha-1 FYM). This treatment increases 24.66 and 14.45 percent grain and stover
yield of maize and 16.94 and 12.82 percent grain and straw yield of wheat as
compared to RDF. Nutrients uptake by maize and wheat also significantly increased
with the application of 100% NPK+ 10 t ha-1 FYM.
The highest available nitrogen and phosphorus in soil after harvest was
recorded with 100% NPK+ FYM 10 t ha-1 application at both depths (0-15 and 15-30
cm). The highest available potassium in surface soils (0-15 cm) was observed with
150% NPK application. The highest DTPA extractable Zinc 3.69 and 3.62 ppm, Iron
* Ph.D. Research Scholar, Department of Agri. Chem. and Soil Science, RCA, Udaipur
** Professor, Department of Agri. Chem. and Soil Science, RCA, Udaipur
3.72 and 3.64 ppm Copper 2.57 and 2.51 ppm and manganese 13.58 and 13.42 ppm
was recorded at 0-15 and 15-30 cm depth with application of 100% NPK + Zn, 100%
NPK + Zn +S, 100% NPK+ FYM 10 t ha-1 and FYM @20 t ha-1, respectively.
Soil enrichment with 150 % NPK resulted in highest positive balance of
nitrogen and phosphorus in soil. Available potassium contents decreased under all
treatments.
All zinc fractions except DTPA soluble Zn was found highest under
application of 100% NPK+ FYM 10 t ha-1 application. The highest DTPA –Zn was
observed with 100% NPK +Zn application followed by 100% NPK +Zn +S. All zinc
fractions shows deceasing trend with depth. Application of 100% NPK+ FYM 10 t ha-
1 resulted in the highest values of all fractions of Iron and Manganese at both depths
and closely followed by FYM 10 t ha-1 + 100% NPK (-NPK of FYM) treatment. The
highest water soluble and residual Cu fraction was recorded with application of 150%
NPK followed by 100% NPK+ FYM 10 t ha-1.
Water soluble zinc fraction highly correlated with reducible (r = 0.926**) and
DTPA (r = 0.914**) fractions. DTPA–Zn and reducible Zn also correlated (r =
0.920**) significantly. Exchangeable and DTPA–Fe was significantly correlated with
reducible, residual and total iron fractions. Water soluble copper significantly
correlated with Exchangeable, DTPA soluble and reducible copper fractions.
Reducible and DTPA-Cu fractions also significantly correlated (r = 0.943**). DTPA–
Mn, water soluble fraction of Mn highly correlated with exchangeable (0.897**) and
residual (0.879**) manganese fraction.
Correlation coefficient values reveal that grain and straw/stover yield of maize
and wheat highly correlated with the exchangeable fraction of all micronutrients (Zn,
Fe, Cu, Mn).
Description
Effect of Integrated Nutrient Management on Micronutrient
Fractions and Nutrient Availability under Maize-Wheat Cropping
System on Typic Haplustepts
Keywords
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Citation
Priyanka, and Sharma, S.K.