Abstract
Potato crop has strict requirement for a balanced fertilizati on management, without which growth and development of the crop are poor and both yield and quality of tubers are diminished. Among the major nutrients, potassium not only improves yields but also benefits various aspects of quality. Some of the tuber quality parameters affected by potassium nutrition are: tuber size, percentage of dry matter, starch content, internal blackening, storability and resistance to mechanical damage. Potassium also provides resistance against pest and diseases and drought and frost stresses. At present, average yield of potato in India is about 19 t/ha, which is much below the crop potential productivity. Low use of fertilizers and serious imbalances in the N:P:K application ratio are partially responsible for this low yield. Current fertilization rates are insufficient to sustain high yields and to replenish nutrient removal by the crop. Field experiments jointly conducted by IPI, PRII and CPRI at Shimla and Jalandhar show that a balanced N x K fertilization increased tuber yield. Increasing K doses decreased the yield of small grade tubers and increased the proportion of large marketable tubers. Potassium application also dramatically decreased the incidence of late blight. In 1998, a maximum yield of 40.8 t ha -1 was obtained at Kufri (Shimla) when applied 180 kg N ha -1 , 100 kg P2O5 ha -1 and 150 kg K2O ha -1 , against a tuber yield of only 14.6 t/ha -1 at the control plots. It is concluded that high yields and enhanced quality tubers can only be sustained through the application of o ptimal nutrient doses in balanced proportion.
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Claims 6
Claim · model-written summary
A balanced N x K fertilization increased potato tuber yield in field experiments at Shimla and Jalandhar.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- a balanced N x K fertilizatione1
- Outcome
- tuber yielde1
- Direction
- increasede1
- Setting
- Shimla and Jalandhare1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potassium and integrated nutrient management in potato”
e1“Field experiments jointly conducted by IPI, PRII and CPRI at Shimla and Jalandhar show that a balanced N x K fertilization increased tuber yield”
Claim · model-written summary
Increasing K doses decreased the yield of small grade potato tubers.
- Taxon
- potatoSolanum tuberosumt0
- Organ / stage
- tuberse2
- Treatment
- Increasing K dosese2
- Outcome
- yield of small grade tuberse2
- Direction
- decreasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potassium and integrated nutrient management in potato”
e2“Increasing K doses decreased the yield of small grade tubers and increased the proportion of large marketable tubers”
Claim · model-written summary
Increasing K doses increased the proportion of large marketable potato tubers.
- Taxon
- potatoSolanum tuberosumt0
- Organ / stage
- tuberse2
- Treatment
- Increasing K dosese2
- Outcome
- proportion of large marketable tuberse2
- Direction
- increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potassium and integrated nutrient management in potato”
e2“Increasing K doses decreased the yield of small grade tubers and increased the proportion of large marketable tubers”
Claim · model-written summary
Potassium application decreased the incidence of late blight in potato.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Potassium applicatione3
- Interactor
- late blighte3pathogen
- Outcome
- incidence of late blighte3
- Direction
- decreasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potassium and integrated nutrient management in potato”
e3“Potassium application also dramatically decreased the incidence of late blight”
Claim · model-written summary
In 1998 a maximum potato yield of 40.8 t/ha was obtained at Kufri (Shimla) with 180 kg N, 100 kg P2O5 and 150 kg K2O per hectare, against 14.6 t/ha at the control plots.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- 180 kg N ha -1 , 100 kg P2O5 ha -1 and 150 kg K2O ha -1e4
- Outcome
- yielde4
- Direction
- maximume4
- Value
- 40.8 t ha -1e4
- Qualifier
- against a tuber yield of only 14.6 t/ha -1e4
- Comparator
- control plotse4
- Setting
- Kufri (Shimla)e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potassium and integrated nutrient management in potato”
e4“In 1998, a maximum yield of 40.8 t ha -1 was obtained at Kufri (Shimla) when applied 180 kg N ha -1 , 100 kg P2O5 ha -1 and 150 kg K2O ha -1 , against a tuber yield of only 14.6 t/ha -1 at the control plots”
Claim · model-written summary
The authors conclude that high potato yields and enhanced tuber quality can only be sustained with optimal nutrient doses in balanced proportion.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- nutrient doses in balanced proportione5
- Outcome
- high yields and enhanced quality tuberse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potassium and integrated nutrient management in potato”
e5“high yields and enhanced quality tubers can only be sustained through the application of o ptimal nutrient doses in balanced proportion”
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