发酵污泥不同施用方式对土壤温度和棉花苗期生理特性的影响

[目的]研究城市发酵污泥在棉花上的最佳施用方式,降低棉花生产成本。[方法]采用盆栽试验方法,探讨不施用发酵污泥(CK)、污泥覆盖土壤表面(处理(1))、污泥与土壤混合(处理(2))、混合+覆盖(处理(3))4种方式对棉苗、根系生长的影响。[结果]污泥的不同处理对棉花苗期根际土壤温度增温效果明显,以10 cm处土层最明显,处理(1)、(2)、(3)地温平均较对照CK高1.2、2.9、1.5℃;显著促进棉花苗的生长,棉花出苗率、健苗率、株高、叶面积、叶片数与CK相比极显著增加;对棉花苗根有诱导和促进生长作用,根长、根数量、根粗、根体积显著高于CK。[结论]发酵污泥3种不同施用方式都能够促进棉花苗生长,改善叶片和根的各项生理指标。整体来看,处理(2)综合优势好,是发酵污泥较有效的施用方式。

Effects of Fermented Sludge on Soil Temperature and Characteristics of Cotton Seedlings with Different Application Methods

[Objective]To research the best application pattern of urban fermented sludge on the cotton to increase production.[Method]The effects of urban fermented sludge treated with cotton application methods including blending,mulching ,blending and mulching on the growth of cotton,leaf physiological characteristics and the root morphology were discussed by using pot experiment.[Result]The warming effect of different treatments with urban fermented sludge was obvious,10 cm of soil had the most obvious effect.Compared with CK,the ground temperature of blending,mulching ,blending and mulching were increased 1.2,2.9,1.5 ℃ more than the control.Urban fermented sludge treatment can significantly promote the growth of cotton seedling,cotton seedling emergence rate,the healthy seedling rate,plant height,leaf area,leaf number significantly increased compared with the control.Urban fermented sludge treatment had inducing and promoting effect on growth,root length,root number,root diameter,root volume of applying urban fermented sludge treatment were significantly higher than the control.[Conclusion] Three different fermented sludge methods can promote the growth of cotton seedling,improve the physiological indicators of leaf and root.Overall,mulching treatment has comprehensive advantages,which is an effective application pattern of urban fermented sludge.