Effect of biosolid on turf grass stress physiology

The disposal of biosolids has drawn significant attention. Applying biosolids to lawn grass plantings is considered to be one of the possible ways of sludge resource utilization. This review summarizes overall research results about the effect of biosolids on the physiological growth of turf grass in response to stress. It showed that applying an appropriate amount of biosolid to turfgrass could benefit turfgrass chlorophyll and photosynthesis values, mineral nutrition content, osmotic adjustment and antioxidant enzyme systems activity, resulting in the enhanced adaptability of turfgrass to stress conditions. Moreover, the proper amount of biosolid to apply depends on the turfgrass species, and overuse of biosolids could lead to negative effects on turfgrass growth. The positive effects of biosolid on turfgrass may be partially, but not completely, due to the abundant nutrients and bioactive substances in biosolids. The underlying mechanism remains to be investigated further.