1UR Animal et Fonctionnalités des Produits Animaux (USC340),INRA-Université de Lorraine,2 avenue de la Forêt de Haye,TSA 40602,54518 Vandœuvre-lès-Nancy Cedex,France.
3UE PTEA,Plate-forme Tropicale d'Expérimentation sur l'Animal (UE1294),INRA Antilles-Guyane,Domaine de Gardel,97160 Le Moule,Guadeloupe,France.
Animal. 2017 Aug;11(8):1363-1371. doi: 10.1017/S1751731116002755. Epub 2017 Jan 10.
Soil is the main matrix which contributes to the transfer of environmental pollutants to animals and consequently into the food chain. In the French West Indies, chlordecone, a very persistent organochlorine pesticide, has been widely used on banana growing areas and this process has resulted in a long-term pollution of the corresponding soils. Domestic outside-reared herbivores are exposed to involuntary soil intake, and tethered grazing commonly used in West Indian systems can potentially favour their exposure to chlordecone. Thus, it appears necessary to quantify to what extent grazing conditions will influence soil intake. This experiment consisted of a cross-over design with two daily herbage allowance (DHA) grazed alternatively. Six young Creole bulls were distributed into two groups (G1 and G2) according to their BW. The animals were individually tethered and grazed on a restrictive (RES) or non-restrictive (NRES) levels of DHA during two successive 10-days periods. Each bull progressed on a new circular area every day. The two contrasting levels of DHA (P0.05) due to the lower DMI of RES compared with NRES treatment.
土壤是环境污染物向动物转移的主要基质，进而进入食物链。在法属西印度群岛，氯丹是一种非常持久的有机氯农药，曾广泛用于香蕉种植区，这导致了相应土壤的长期污染。家养的户外饲养草食动物会无意中摄入土壤，而在西印度群岛系统中常用的拴系放牧可能会使它们更容易接触到氯丹。因此，有必要量化放牧条件将在多大程度上影响土壤摄入。本实验采用交叉设计，两种日草料允许量（DHA）交替进行。根据体重，将 6 头年轻的克里奥尔公牛分为两组（G1 和 G2）。动物被单独拴系，并在两个连续的 10 天周期内分别在限制（RES）或非限制（NRES）DHA 水平下放牧。每天每头公牛都会在一个新的圆形区域内进行放牧。由于 RES 处理的 DMI 低于 NRES 处理，因此两种不同的 DHA 水平（P<0.05）。
