Document Type : Original Research Article
Authors
1
Ornamental Plants and Landscape Gardening Res. Dept., Hort. Res. Inst., ARC, Giza, Egypt
2
Ornamental Plants and Landscape Gardening Res. Dept., Hort. Res. Inst., ARC, El-Mataena Research Station, Luxor, Egypt
Abstract
A field study was carried out at East Owainat Agric., Res. Station, New Valley, Egypt during two successive seasons (2022/2023 and 2023/2024) to investigate the most suitable NPK fertilization rate and five planting densities (70, 60, 50, 40 and 30 plants/m2) for the best growth performance of seashore paspalum turfgrass under the environmental conditions of New Valley Region. The obtained results showed that all vegetative growth characters were gradually augmented during Dec. and Jan., but again increased till the end of the experiment. Regarding the NPK fertilization rates the four tested growth traits, the three photosynthetic pigments and N, P and K % and uptake were all promoted gradually parallel to the gradual increase in NPK fertilization rate where the highest rate resulted in the highest values. So, it is recommended to supply seashore paspalum turfgrass with the highest two NPK rates (0: 0: 0, 10: 7.5: 7.5, 15: 10: 10, 20: 12: 12 and 25: 15: 15) from ammonium nitrate (33.5% N), calcium superphosphate (15.5 P2O5) and potassium sulphate (48% K2O), at one month interval after planting date along the growing season in order to obtain the ideal turf. On another side, the four vegetative growth characters of plants gradually increased from planting date on May 15th and up to Nov. 15th, decreased throughout Dec., Jan. and Feb. but again increased in March. Regarding the five density treatments (70, 60, 50, 40 and 30 plants/m2) all growth characters as well as, the three photosynthetic pigments concentration, and N, P and K % were gradually and consistently increased according to the gradual increase in planting densities. Therefore, the highest values were obtained from the highest density treatments (70 followed by 60 plants/m2), while the lowest values were given due to the lowest density treatment (30 plants/m2).
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