Effect of Crop Residue & Nutrient Management on Carbon Dynamics and Soil Health in Soybean [Glycine max (L.) Merrill] under Chambal Command Area
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Date
2021
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MPUAT, Udaipur
Abstract
A field experiment entitled “Effect of Crop Residue & Nutrient
Management on Carbon Dynamics and Soil Health in Soybean [Glycine -max
(L.) Merrill] under Chambal Command Area” was conducted at Agriculture
Research Station, Ummedganj- during two consecutive Kharif seasons of the year
2019-20 and 2020-21 to study the effect of crop residue and nutrient management on
growth, yield and quality of soybean in Chambal commandarea,to work out the
nutrient content and uptake bysoybean, to assess the physico-chemical and biological
properties of soil and to evaluate different chemical pools of carbon and their
significance in relation to soil andcrop.The experiment consisted of 16 treatment
combinations in factorial randomized block design with three replications with two
factors Crop residue & Nutrient management and both the factors have four levels.
The levels of crop residue management are CR1 Crop residue incorporation without
irrigation, CR2 Crop residue incorporation with irrigation, CR3 Crop residue
incorporation with irrigation and application of urea@ 25 kg ha-1, CR4 Crop residue
incorporation with irrigation and application of urea @ 25 kg ha-1+ cellulolytic
microbes @ 2.0 kg ha-1 and Nutrient management are F1 Control, F2 75% RDF, F3
100% RDF (20:40:40 NPK kg ha-1) and F4 125% RDF. The crop residue incorporated
in plots one month before sowing. Variety “RKS-45” of soybean was sown as per
recommended package of practices.
Results revealed that application of crop residue incorporation with irrigation
and application of urea @ 25 kg ha-1+ cellulolytic microbes @ 2.0 kg ha-1along with
100% RDF increased plant height, chlorophyll content, total nodules plant-1, effective nodules plant-1, leghaemoglobin content, fresh and dry weight of nodules, pods plant-1,
seeds pod-1, seed yield, haulm yield, biological yield, nutrient content and uptake by
N, P, K, S, Zn, Fe, Mn and Cu in seed and haulm, protein content seed in soybean
and nutrient content along with their uptake by crop (N, P, K,S and micronutrient viz.,
Fe, Zn, Cu and Mn). Enriched fertility of soil via application of Crop residue
incorporation with irrigation and application of urea @ 25 kg ha-1+ cellulolytic
microbes @ 2.0 kg ha-1 and 100% RDF significantly decreased the bulk density and
increased the porosity and water holding capacity as compared to 100% RDF.
Further results showed that organic carbon, available N, P, K, Sand
micronutrients viz., Fe, Zn, Cu and Mn in soilwere found higher at harvest stage of
soybean with the application ofCrop residue incorporation with irrigation and
application of urea @ 25 kg ha-1+ cellulolytic microbes @ 2.0 kg ha-1with 100%
RDF.Total organic carbon, cation exchange capacity, WHC, available nitrogen,
phosphorus, potassium and DTPA-extractable micronutrients (Zn, Fe, Mn and Cu),
alkaline phosphate activity, dehydrogenase activity, MBC and soil microbial
population, TOC, DOC, Hot water extractable carbon, POM-C-N, Chan pool, Cmin,
Water soluble Carbon, Water soluble carbohydrates in soil after harvest of crop
during both the years, as well as in pooled analysis significantly influenced due to
crop residue incorporation with irrigation and application of urea @ 25 kg ha-1+
cellulolytic microbes @ 2.0 kg ha-1along with100% RDF.
The higher seed yield (1909.4 kg ha-1), haulm yield (3617.1 kg ha-1),
biological yield (5526.6 kg ha-1) N, P , K, S, Zn, Fe, Mn uptake net returns (` 57393
ha-1) and B:C ratio (2.20) was obtained under the combined application of crop
residue incorporation with irrigation and application of urea @ 25 kg ha-1 +
cellulolytic microbes @ 2.0 kg ha-1and 100% RDF(20:40:40). During both the years
as well as in pooled analysis. The seed yield of soybean was found significant and
positively correlated with stover yield, biological yield and different chemical pools
of carbon in soil. The different chemical pools of carbon were also correlated
positively and significant among them indicating dynamic equilibrium in the soil
solution
Description
Effect of Crop Residue & Nutrient Management on Carbon Dynamics and Soil Health in Soybean Chambal Command Area
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Citation
Yadav V.K. And Meena S.C.