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首页> 外文期刊>Agroforestry Systems >Forage availability in a silvopastoral system having different densities of Leucaena leucocephala under Voisin grazing management
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Forage availability in a silvopastoral system having different densities of Leucaena leucocephala under Voisin grazing management

机译：在voisin放牧管理下具有不同密度的硅藻土的淤积系统中的觅食可用性

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摘要

Available forage biomass, botanical and forage chemical compositions, stocking rates, and resting times of plants after grazing were assessed in a silvopastoral system (using Voisin grazing) having 15,000 (D15) and 25,000 Leucaena leucocephala trees ha(-1) (D25), associated with Digitaria eriantha. A randomized complete block design with two replicates was used. Biomass samples were collected from July 2017 to July 2018, when grass (during rainy and transition seasons) and trees (during the dry season) achieved their optimal resting points and sheep grazed paddocks (stock density: 34-204 AU ha(-1) according to season). Biomass yield was higher in D25 (15,958 +/- 1190 kg DM ha(-1), p < 0.05) with higher carrying capacity (2.93 +/- 0.43 AU ha(-1) year(-1)). Yield fluctuated over time (p < 0.0001) with greater biomass (p < 0.05) during the rainy (up to 3722 +/- 121 kg DM ha(-1)), than in the transition (1800 +/- 121 kg DM ha(-1)) and dry seasons (511 +/- 121 kg DM ha(-1)). Between 59 and 65% of the biomass was grass during the transitional and rainy seasons, while during the dry season, 100% of the biomass was from the trees and crude protein was greater in trees (24%) than in grass (10%) biomass. Rest periods for the paddocks varied according to grazing season (from 31 to 120 days). Higher tree density increased forage biomass and yield in the silvopastoral system, which was maintained throughout the year even with seasonal precipitation because the trees sustained growth for an extended period during the year.
机译：在硅藻土系（使用voisin放牧）中评估饲养生物质，植物和饲料化学成分，植物和饲料的化学成分，植物和饲料的植物休息时间（使用voisin放牧），具有15,000（d15）和25,000个leucaena leucocephala树木Ha（-1）（d25），与数字基西亚二元相关联。使用具有两个重复的随机完整块设计。从2017年7月到2018年7月收集生物质样品，当时草（在雨后和过渡季节）和树木（干燥季节）实现最佳休息点和绵羊放牧围场（库存密度：34-204 Au ha（-1）据季节）。 D25的生物质产率较高（15,958 +/- 1190千克DM HA（-1），P <0.05），载物较高（2.93 +/- 0.43 Au ha（-1）年（-1））。在多雨期间（高达3722 +/- 121kg DM HA（-1）），产量随着时间的推移而波动（P <0.0001），生物量更高（P <0.05）（高达3722 +/- 121公斤（-1））（1800 +/- 121公斤DM HA （-1））和干燥季节（511 +/- 121 kg DM ha（-1））。在59和65％的生物质之间是过渡和雨季的草，而在干燥的季节，100％的生物质来自树木，粗蛋白在树上大于草（24％）（10％）生物质。围场的休息时间根据放牧季节（从31到120天）而变化。较高的树密度增加了血散生物量增加，硅质体系中的产量，即使是季节性降水，均为季节性降水，因为树木在年内持续增长。

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