Abstract
Background: Acidic soils limit the soil phosphorus availability to the crop plants because these soils have tendency to fix P as iron and aluminium phosphate. The present study aims to investigate the influence of phosphorus sources and levels on yield and nutrient uptake of rapeseed (Brassica campestris var. toria) in acidic soils of Meghalaya. Methods: A pot culture experiment was conducted during rabi season of 2016-17 wherein two sources of P (single super phosphate and Mussoorie rock phosphate) and six levels of P (0, 30, 60, 90, 120 and 150 mg P kg-1 of soil) were tested in two types of acidic soils (Alfisols, Inceptisols) in completely randomized design with three replication and rapeseed (cv. M-27) as test crop. Result: The highest mean dry matter yield of rapeseed (16.1 g pot-1) was recorded with 120 mg P kg-1 of soil. Subsequent increase in the level of P significantly decreased the dry matter yield by 4.6% over 120 mg P kg-1. The dry matter yield with Mussorie rock phosphate was lower as compared to single sulphur phosphate (SSP) at each levels of P irrespective of soil type. The concentration of P in plant dry matter of rapeseed increased with each successive levels of P in acidic soils with both P sources; however P uptake increased up to 120 mg P kg-1 soil.
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Claims 5
Claim · model-written summary
Rapeseed dry matter yield peaked at 16.1 g per pot with 120 mg P per kg soil.
- Taxon
- rapeseede0
- Treatment
- 120 mg P kg-1 of soile0
- Outcome
- dry matter yielde0
- Direction
- higheste0
- Value
- 16.1 g pot-1e0
Not reportedComparator
Verbatim
e0“The highest mean dry matter yield of rapeseed (16.1 g pot-1) was recorded with 120 mg P kg-1 of soil.”
Claim · model-written summary
Increasing P beyond 120 mg per kg decreased dry matter yield by 4.6%.
Verbatim
e0“Subsequent increase in the level of P significantly decreased the dry matter yield by 4.6% over 120 mg P kg-1.”
t0“Rapeseed”
Claim · model-written summary
Rock phosphate produced less dry matter than superphosphate across P levels and soil types.
Verbatim
e0“The dry matter yield with Mussorie rock phosphate was lower as compared to single sulphur phosphate (SSP) at each levels of P irrespective of soil type.”
t0“Rapeseed”
Claim · model-written summary
Plant P concentration increased at each successive P dose with both sources.
- Taxon
- rapeseede0
- Treatment
- successive levels of Pe0
- Outcome
- concentration of P in plant dry mattere0
- Direction
- increasede0
- Setting
- acidic soilse0
Not reportedComparator
Verbatim
e0“The concentration of P in plant dry matter of rapeseed increased with each successive levels of P in acidic soils with both P sources”
Claim · model-written summary
P uptake increased up to 120 mg P per kg soil.
Not reportedComparator
Verbatim
e0“P uptake increased up to 120 mg P kg-1 soil”
t0“Rapeseed”
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