Abou-Assaf N, Coats J R
Department of Entomology, Iowa State University, Ames 50011.
J Environ Sci Health B. 1987 Jun;22(3):285-301. doi: 10.1080/03601238709372558.
The effects of three soil pH's, three soil temperatures, and three soil moistures on [14C]isofenphos degradation were investigated. All three factors interacted strongly and significantly affected the persistence of isofenphos as well as the formation of the degradation products (p less than 1%). Isofenphos degradation was greatest at the higher temperatures 35 degrees C greater than 25 degrees C greater than 15 degrees C (except under alkaline pH's), medium moisture 25% greater than 30% greater than 15%, and in both alkaline (pH = 8) and acidic soils (pH = 6) compared with neutral soil (pH = 7). Isofenphos oxon formation was greatest at higher temperatures 35 degrees C compared with 25 degrees C and 15 degrees C, in acidic soil greater than neutral soil greater than alkaline soil, and under high moisture (30%) compared with the 15% and 22.5% moistures. The formation of soil-bound residues was greatest at higher temperatures 35 degrees C greater than 25 degrees C greater than 15 degrees C, higher moisture 30% compared with 15% and 22.5%, and in alkaline soil compared with neutral and acidic soils.
研究了三种土壤pH值、三种土壤温度和三种土壤湿度对[14C]异柳磷降解的影响。所有这三个因素之间存在强烈的相互作用，并对异柳磷的持久性以及降解产物的形成产生了显著影响（p小于1%）。在较高温度下（35℃＞25℃＞15℃，碱性pH值条件除外）、中等湿度下（25%＞30%＞15%），以及与中性土壤（pH = 7）相比的碱性（pH = 8）和酸性土壤（pH = 6）中，异柳磷的降解最为显著。与25℃和15℃相比，在35℃的较高温度下，在酸性土壤＞中性土壤＞碱性土壤中，以及与15%和22.5%的湿度相比在高湿度（30%）条件下，异柳磷氧的形成最为显著。在较高温度下（35℃＞25℃＞15℃）、较高湿度（30%，与15%和22.5%相比）以及与中性和酸性土壤相比的碱性土壤中，土壤结合残留物的形成最为显著。
