不同粒径垃圾堆肥对高羊茅抗旱性的影响

通过对草坪基质施用不同粒径的生活垃圾堆肥,研究了水分胁迫下垃圾堆肥对高羊茅生理生态的作用.结果表明:施用不同粒径垃圾堆肥对高羊茅生物量及株高的增加产生积极影响,叶绿素含量也有所提高.经粒径300nm的堆肥(堆肥1)处理,高羊茅的叶绿素a和总叶绿素含量分别比对照高出37.3%和14.9%;根长和须根数也有较为明显的增加,分别比对照提高了25.8%和27.8%(P<0.05).不同粒径的堆肥对水分胁迫下高羊茅的过氧化物酶(POD)、超氧化物岐化酶(SOD)和过氧化氢酶(CAT)活性具有积极的调控作用,其中堆肥1处理3种酶的活性分别比对照提高52.7%,65.3%和4.4%.水分胁迫下,堆肥处理对脯氨酸含量影响较小.但施入堆肥能明显降低高羊茅叶片丙二醛含量,其中以300nm粒径的堆肥1和1 700nm粒径的堆肥4处理分别比照降低了19.7%和35.1%.可见,在水分胁迫下,高羊茅草坪基质中施入不同粒径垃圾堆肥,尤其小粒径堆肥(300～600nm),可明显改善植物的生理生态调节功能,缓解水分胁迫带来的伤害,提高高羊茅的抗旱性.

Effects of different particles municipal solid waste compost on drought resistance of Festuca arundinacea L.

A pot experiment was performed to investigate eco-physiological effects of different particles municipal solid waste(MSW) compost added in turf medium on Festuca arundinacea L.under water stress.The results showed that the addition of different particles-compost into turf medium had positive effects on the increase of biomass,plant height and chlorophyll content of F.arundinacea.The contents of chlorophyll a and total chlorophyll were increased by 37.3% and 14.9% in different particles-compost 1 treatment(3...