Regulatory effect of GA and KT on seeds germination of Nitraria tangutorum Bobr.

Nitraria tangutorum Bobr. seeds were treated with GA and KT with different concentrations, and the vigor, water absorption rate, seed germination rate etc of seed tested. Results show that the water absorption rate of N. tangutorum seed rapidly increases in the first 2 hours, and the whole absortption procedure appears rapid-slow-slower regulation. The best germination feature appears in treatment of 150 mg·kg-1 GA, meanwhile seed germination rate and other features are lowest under 300 mg·kg-1 GA. 60 mg·kg-1 KT showes best effect on improving seed germination with highest germination rate, germination energy, germination index and vigor index, while 100 mg·kg-1 KT presents inverse effect.