De or het bryologie?

The correct Dutch article is:

de bryologie

Rule Words ending in -logie: always de. See the rule
Meaning (Dutch) (plantkunde) tak van de biologie die zich richt op de studie van de mossen Bryophyta

How to use bryologie

the bryologiede bryologie
this bryologiedeze bryologie
that bryologiedie bryologie
our bryologieonze bryologie
your bryologiejouw bryologie
every bryologieelke bryologie
which bryologie?welke bryologie?
a big bryologie / the big bryologieeen grote bryologie, de grote bryologie

Dutch words ending in bryologie

embryologie

In compound words, the last part decides the article. See the rule

Meaning, plural, diminutive, pronunciation and translations: WikiWoordenboek (Dutch Wiktionary) (CC BY-SA 4.0). Example sentences: Tatoeba (CC BY 2.0 FR).