污泥对草坪草逆境生理的影响

日益增长的污水处理副产物——污泥的处置问题越来越引起人们的关注,将污泥应用于草坪草的种植被认为是污泥资源化利用的可行途径之一。本文综述了污泥对草坪草逆境生理影响的研究进展,众多研究表明,适宜用量的污泥对草坪草叶绿素及光合效应、矿质营养、渗透调节物质和抗氧化酶系统均有有益影响,能提高其应对逆境的适应能力;过量施用污泥则会影响草坪草的生长,不同的草种对污泥施用量的要求不同。污泥能提高草坪草抗逆性的原因可能是由于污泥富含多种营养元素和生物活性物质,但其提高草坪草抗逆性的内在机制还有待进一步研究。

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.