Study of the activity of phosphorous acid as a phosphorus plant fertilizer.
1996
Adamowicz, Stephane | Fabre, José | Hostalery, Josiane | Robin, Paul
Phosphite's capacity to offset phosphorus deficiency was studied on tomato plants through four trials. Different application methods of phosphite (foliar or root) were studied in a nutrient film technique (NFT) disposal, providing optimum conditions for changes to feeding (starvation or nourishment). The ecophysiological approach aimed to characterise the growth and development of plants by the production of dry matter and the formation of the leaf surface, according to environmental conditions during the exponential phase. The results obtained on leaf symptoms and aerial growth emphasize that phosphite is unable to replace phosphate as a phosphorus nutrient, when applied either as a foliar spray or by incorporation in the nutrient solution. What is more, its use on phosphorus deficient plants negatively affects root growth, which is detrimental in case of mineral deficiency. However phosphite does not affect aerial and root growth when plants are normally fed with phosphate.
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Эту запись предоставил National Institute for Agricultural Research