FORESTIST

EFFECT OF SOILTYPE AND SOWING DEPTH ON GERMINATION AND SEEDLlNG ESTABLlSHMENT OF THREE Acacia SPECIES

1.

Assoc. prof. (Forester), Plant Production Dept., Assoc. prof. Soils and Irrigation Dept.. respectively, Facutty of Agriculture/University of Jordan.

FORESTIST 1994; 44: 133-148
Read: 136 Downloads: 71 Published: 07 February 2020

Thi- study lnvestigated the optimum soll type and optimum depth of sowing see ds of three Acacia spcclcs; A. acuminata, A. aneura and A. ephedroides. Three soil types were used; Field soil, pure pine forest soil and mixture of both with flve sowlng depths; 0.5, 1.0, 1.5, 2.0 and 2.5 cm. The rate of seed germination and survival of germinated seeds wcre the principal indicators of the suitability of varlous types of soit and depths. Results indicated that. highest germination percentage of A. acuminata seeds was obtained from sccds sown at 1.5 cm depth, and the highest survival of seedlings was reachcd by 2.0 and 2.5 cm dcpths in fieid soil. Highest germination of seeds and highest survival of A. aneura seedlings was the best at LS cm İn field soit. Whereas sowing see ds of A. ephedroides in soil mixture at O.S and LS cm depths gave the highest germination perecntage of the secds, and at 2.0 cm depth in field soit gaye the highest survlval percentage of the seedlings. Gcnerally, results indicated the decreasing of the survival percentage of the seedling with inercasıng sowing depths. As for the best germinalion and survival of seedlings, the best soil was found to be the field soit followed by the mixture then the pine forest soil. 

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EISSN 2602-4039