Safety growth Biostimulant to improve Vegetative Growth,Tuber Productivity and Fixed Oil Content of Tiger Nut (Cyperus esculentus L.) Plant.

Document Type : Original Article

Author

Hort. Dept., Fac. Agric., Moshtohor, Benha University, Egypt

10.21608/assjm.2025.385513.1362

Abstract

Tiger nut (cyperus esculentus L ) is an underutilized crop  belongs to family Cyperaceae , A field experiment was performed during two successive summer seasons of 2022 and2023 to explore  the effect  of applying sea weed (Ascophyllum nodosum)extract at (0,2,3.4 or 4g/L‑1  )as soil  drench or foliar spray at (0,1,2 g/L‑1) and /or Chitosan soil drenched and sprayed both at (2cm/L‑1) Humic acid  as foliar spray at (2g /L‑1 ) and soil drenched at (4g/L‑1) or Glutamic acid foliar  spray at (1 and 2g/L‑1 )on tiger nut tubers , its fixed oil yields and constituents. Results showed that both methods of  application  sea weed extract  positively influenced growth and tuber productivity ,soil drench of seaweed extract at 4g/L‑1 followed by 3g/L‑1  showed an increases in,fresh , dry weights / plant, tuber, fixed oil yields / plant and feddan whereas the foliar application of sea weed by both rates 2g/L‑1  followed by 1g/L‑1   caused more promising effect than drenching application. The combined of both methods of application 4g/L‑1 and2g/L‑1 followed by 3g/L‑1 and 2g/L‑1 significantly ameliorated these impacts as they induced the highest values of  vegetative growth traits, tuber and fixed oil yields / plant or feddan . The highest values of the main oil component of unsaturated fatty acids, flavonoids ,flavonoid glucoside , terpenoids and aromatic acids. Apply sea weed (Ascophyllum nodosum) extract as   soil drench at 4g/L‑1  and or 3g/L‑1  with foliar sprayed  sea  weed 2g/L‑1 is recommended  to improve tiger nut tubers, and their fixed oil productivity.

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