Journal of Food, Agriculture and Environment

The effect of phosphorus fertilizers on the growth and quality of lettuce (Lactuca sativa L.) under greenhouse and field conditions 

Author(s):

Asad M. F. AlKhader *, Azmi M. Abu Rayyan, Munir J. Rusan

Recieved Date: 2012-11-02, Accepted Date: 2013-04-20

Abstract:

Two experiments were conducted, a pot greenhouse and  an open field trial, to evaluate the effects of different forms and rates of P fertilizers on the growth and quality of lettuce (Lactuca sativa L.) cultivar ‘Robinson’ of iceberg type. The results revealed that the variation in the agronomic performance of P fertilizers affected plant growth and yield differently. Under both conditions, plants fertilized with monoammonium phosphate (MAP) produced the highest fresh and dry weights/plant and yield, whereas the lowest weights and yield were related to PR-fertilized plants. However, in the greenhouse trial, MAP, single super phosphate (SSP) and diammonium phosphate (DAP) induced significant differences in plant fresh and dry weights/plant and yield: MAP>SSP>DAP>PR (rock phosphate). Meanwhile, no significant differences were observed among these fertilizers under the field condition: MAP=SSP=DAP>PR. P fertilizer type and rate showed a significant effect on the other growth and quality parameters (plant height and leaf surface area) under both circumstances. Under greenhouse condition, different P rates significantly produced higher total leaf number than that realized by the control treatment. 

Keywords:

Lactuca sativa, phosphorus, DAP, MAP, SSP, PR, fresh and dry weights, plant height, leaf surface area, leaf number

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Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 2
Category: Agriculture
Pages: 777-783

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