Nutrient management
practices for improved crop and water productivity, grain quality and energy
productivity of promising rice cultivars in Eastern Himalayas
M.N. Harish1,
A.K. Choudhary1*, Y.V. Singh2, V. Pooniya1,
A. Das3, S. Babu3, A. Dass1 and T.
Varatharajan1
1Division of
Agronomy, ICAR-Indian Agricultural Research Institute, New Delhi-110 012,
India
2Division of
Microbiology, ICAR-Indian Agricultural Research Institute, New Delhi-110 012,
India
3ICAR-Research
Complex for North-Eastern Hill Region, Barapani-793 103, India
*Corresponding Author Email : anilhpau2010@gmail.com
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Abstract
Aim:
To assess the influence of nutrient management practices on crop and water
productivity, grain quality, energy productivity and profitability in
promising rice genotypes of Eastern Himalayas.
Methodology: An experiment was conducted at ‘Lowland Research
Block’ of ICAR–RC–NEHR, Barapani, Meghalaya to assess the influence of
different nutrient management practices [Organic nutrient management (through
FYM + remaining P through rock phosphate); integrated nutrient management
(INM) (50% NPK through fertilizers + 50% N through FYM + remaining P through
rock phosphate); inorganic nutrient management (fertilizers); and absolute
control] and rice varieties [Shahsarang–1, Lumpnah and Megha semi-aromatic–2]
on productivity, quality, energetic and profitability replicated thrice in a
split-plot design.
Results:
Rice grain yield was significantly higher in INM practice (4.18 t ha-1)
followed by inorganic (4.02 t ha-1) and organic practice (3.74 t
ha-1). INM practice exhibited highest hulling (68.6%), milling
(59.9%), head-rice recovery (53.6%), protein content (7.56%) and protein
yield (329 kg ha-1) followed by inorganic, organic practice and
control, respectively. However, gross and net returns and B: C ratio were
significantly greater in inorganic practice followed by INM practice. Highest
TWUE (3.17 kg ha-1 mm-1), water productivity (47.6 INR
ha-1 mm-1), energy output (140342 MJ ha-1)
as well as net energy (130813 MJ ha-1) were recorded in INM
practice.
Interpretation: INM practice and rice variety
‘Shahsarang–1’ can be recommended to farmers for enhancing the rice
productivity, profitability, resource-use efficiency and soil health in
eastern Himalayan region of India.
Key
words:
Energetics, Grain quality, Integrated nutrient management, Rice varieties,
Water-use efficiency
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