Effect of integrated nutrient management on maize yield, nutrients uptake and soil properties in an Alfisol
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Date
2022-12-19
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
CSK HPKV, Palampur
Abstract
A field experiment was conducted at the experimental farm of Department of Soil
Science, CSK HPKV, Palampur, during kharif; 2021 to study the “Effect of integrated
nutrient management on maize yield, nutrients uptake and soil properties in an Alfisol”. The
soil of the experimental site, taxonomically belonged to the order Alfisol under the sub-group
Typic Hapludalf, having silty clay loam in the texture, acidic in reaction, low in available N
and medium in P, K and organic carbon content. The experiment was laid out in a randomized
block design with eleven treatments which were replicated thrice, viz T1: Control (No
fertilizer), T2: General Recommended Dose (GRD) (120 kg N, 60 kg P2O5 and 40 kg K2O ha 1
),T3: Farmer’s practice (25 per cent N of GRD + FYM @ 5 t ha-1
),T4: Farmer’s practice +
Phosphorous Solubilizing Bacteria (PSB),T5: Soil test-based fertilizer application (STB), T6:
Soil test-based fertilizer application (STB) + FYM @5 t ha-1
, T7: Soil test-based fertilizer
application (STB) + FYM @ 5 t ha-1
+ PSB, T8: Target yield 35 q ha-1
(T35), T9: Target yield
35 q ha-1 with FYM @ 5 t ha-1
, T10: Target yield 45 q ha-1
(T45), T11: Target yield 45 q ha-1
with FYM @ 5 t ha-1
. Different treatments approach positively influenced the organic carbon,
soil available nutrients, crop yield and uptake of nutrients by maize, but did not show
significant changes in physical properties viz. bulk density, particle density and porosity and
chemical properties viz. pH. Significantly higher grain yield, stover yield and total N, P, K,
micronutrients (Fe, Mn, Cu and Zn) uptake by maize were recorded in the treatment of target
yield 45 q ha
-1 with FYM as compared to the soil test-based fertilizer application, farmers’
practice, and general recommended doses of fertilizer. The grain yield (46.3 q ha-1
), stover
yield (77.2 q ha-1
), total N, P, K and micronutrients (Fe, Mn, Cu and Zn) (123.6, 76.0, 92.8 kg
ha-1
, 362 g ha-1
, 585 g ha-1
, 457 g ha-1
and 520 g ha-1 respectively) uptake was recorded by
grain. The highest contents of organic carbon (6.95 g kg-1
), EC (0.22 ds m-1
), exchangeable
Ca {1.78 cmol (p+) kg-1
}, Mg {0.70 cmol (p+
) kg-1
}, DTPA-extractable micronutrients Fe
(24.2 mg kg-1
), Mn (17.9 mg kg-1
), Cu (0.45 mg kg-1
) and Zn (0.98 mg kg-1
), microbial
biomass carbon (101 mg g-1
), dehydrogenase activity (4.44 g TPF g-1
hr-1
), water holding
capacity (56.6 per cent) were found in target yield of 45 q ha-1 with FYM. Soil test-based
fertilizer application and 45 q ha-1
target yield without FYM treatments were having
maximum B:C (2.48) and least was in farmer’s practice with PSB (1.28).