Effect of phosphorus and some biostimulants on growth yield phosphoruse use efficiency and tuber quality of potato plants growth in sandy soil
2010
Abou El-Khair, E.E. | Nawar, D.A.S.
effect of phosphorus fertilizer (20, 40, 60 and 80 kg/fed.) and some biostimulants (phosphorein and mycorrhiza) as well as their interactions on growth, yield, phosphorus use efficiency and tuber quality under sandy soil conditions using drip irrigation system. Plant height, number of both aerial stems and leaves/ plant, shoot dry weight, P and K percentages, and number of tubers/ plant, average tuber weight and yield / plant as well as total yield/fed., phosphorus use efficiency by potato plants, chlorophyll concentration in leaf tissues, N, P and K uptake by shoot, N, P, K and dry matter percentage in tubers were significantly increased with increasing phosphorus levels up to 80 kg/feddan. Inoculation of potato tuber seeds with phosphorein or mycorrhiza significantly increased plant height, number of leaves/ plant, shoot dry weight, chlorophyll concentration in leaf tissues, N,P in shoots and their uptake, average tuber weight, yield/ plant as well as total yield/ fed., N, P and dry matter( %) in tubers. Moreover, phosphorus use efficiency by potato plants recorded the maximum values when tuber seeds were treated with mycorrhiza. Interaction effect between phosphorus at 60 kg/fed. and inoculation of tuber seeds with mycorrhiza was the superior treatment for enhancing plant height, number of leaves and concentrations of chlorophyll a, b and total (a+b) as well as phosphorus use efficiency by potato plants. Treating potato plants with 80 kg phosphorus /fed. and inculcation with mycorrhiza gave the highest values of shoot dry weight/ plant, and concentration of N, P in shoots and their uptake, number of tuber/ plant, average tuber weight, yield/ plant as well as total yield/fed., N,P, K and dry matter (%) in tubers.
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