Herbage biomass and uptake under low-input grazing as affected by cattle and sheep excrement patches
Herbage biomass and uptake under low-input grazing as affected by cattle and sheep excrement patches
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低投入放牧下牧草生物量和吸收受牛羊粪便斑块的影响
DOI：
10.1007/s10705-018-9945-3
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发表时间：
2018
影响因子：
3.1
通讯作者：
Tonn B.
中科院分区：
文献类型：
--
作者：
Scheile T;Isselstein J;Tonn B.
在低投入放牧系统中，粪便斑块是主要的养分投入。它们影响牧草生产和放牧动物的摄入量。我们的目标是确定（1）是否季节不同的天气条件和不同的植物组成的草地影响的植物生物量在放牧牧场和（2）如果动物物种在粪便补丁的饲料摄入量不同的粪便效果。我们测量了植物生物量和饲料摄入量的反应，牛和羊的粪便和尿液补丁在旋转放牧低投入的牧场，无论是草为主的或不同的草地在放养期间，在春季和秋季的粪便沉积。在尿地块的植物生物量生产比相应的对照地块高14.7%，伴随着19%和17%的高生物量氮和钾浓度，分别。动物种类、草地类型和放牧期不影响排泄物对植物生物量、营养参数和动物采食量的影响。小规模的草地高度测量结果表明，牛避免植被接近粪补丁在两个放养期间，而绵羊这样做，只有在春季的粪便沉积和牛优先吃草占主导地位的草地上的尿地块。粪便斑块对植被生物量参数的影响较小，掩盖了动物种类、草地类型和粪便沉积时间的潜在影响。
In low-input grazing systems excrement patches are the main nutrient input. They influence both forage production and intake of grazing animals. Our goals were to determine (1) whether seasons of differing weather conditions and swards of differing botanical composition influence the excrement effect on plant biomass in grazed pasture and (2) if animal species differ in their forage intake at excrement patches. We measured the plant biomass and forage intake responses to dung and urine patches of cattle and sheep in rotationally grazed low-input pastures with either grass-dominated or diverse swards in the stocking periods following excrement deposition in spring and autumn. At urine plots the plant biomass production was 14.7% higher than at the corresponding control plots, accompanied by a 19 and 17% higher biomass nitrogen and potassium concentration, respectively. The effect of excrements on plant biomass production, nutrient parameters and animal forage intake was not affected by animal species, sward type or stocking period. Small-scale sward height measurements showed that cattle avoided vegetation close to dung patches in both stocking periods whereas sheep did so only following the excrement deposition in spring and that cattle preferentially grazed at urine plots on grass-dominated swards. The effect of excrement patches on vegetation biomass parameters was small, which masked potential influences by animal species, sward type and excrement deposition time.
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