Yuèdú wèi tā de xiězuò tígōng le fēngfù de yǎngliào.
Reading provides rich nourishment for his writing.
Tips
usage
养料 covers both literal nutrients (for plants, animals) and figurative 'fuel' for thought, art, or growth. For human food/diet specifically, use 营养 (yíngyǎng, nutrition) instead.