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Effect of pasture cover and height on nutrient concentrations in diverse swards in the UK
Grassland Science ( IF 1.3 ) Pub Date : 2020-11-23 , DOI: 10.1111/grs.12306
Matt J. Bell 1 , Zoë J. Huggett 1 , Kimberley R. Slinger 1 , Felicity Roos 2
Affiliation  

A total of 445 pasture samples were collected from six fields representing a wide range of dry grass content (0–100%), and grass, legume, herb, flower and weed species. Fields were located in the grass-dominated and temperate regions of western UK and monitored monthly for 9 months during late summer, autumn and winter months. The pasture properties assessed included measurements of percentage of grass content, height (in centimeters), pasture cover (fresh weight (FW) and dry matter (DM) in kg /ha) and pasture density (FW and DM in kg ha−1cm−1) and nutrient concentrations (DM, crude protein, acid detergent fiber (ADF), neutral detergent fiber (NDF), sugars, ash, digestible organic matter in the DM (DOMD), oil, nitrate nitrogen and metabolizable energy (ME)). This study showed that across the pastures studied, increasing both pasture height and DM cover brought a desirable increase in crude protein, sugars, DOMD, oil and ME for grazing systems. Seasonal changes in nutrient concentrations of diverse swards will occur; however, differences in nutrient concentrations among swards can be minimized by the grass species present and/or mix with broadleaf plants, and management of grass maturity.

中文翻译:

牧场盖度和高度对英国不同草场养分浓度的影响

从代表各种干草含量 (0–100%) 以及草、豆科植物、草本植物、花卉和杂草种类的六个田地中总共收集了 445 个牧场样品。田地位于英国西部以草为主的温带地区,并在夏末、秋季和冬季月份进行了 9 个月的每月监测。评估的牧场特性包括测量草含量百分比、高度(厘米)、牧场盖度(鲜重 (FW) 和干物质 (DM),单位 kg / ha)和牧场密度(FW 和 DM,单位 kg ha -1 cm −1) 和营养浓度(DM、粗蛋白、酸性洗涤纤维 (ADF)、中性洗涤纤维 (NDF)、糖、灰分、DM 中的可消化有机物 (DOMD)、油、硝态氮和代谢能 (ME))。这项研究表明,在所研究的牧场中,增加牧场高度和 DM 覆盖率带来了粗蛋白、糖、DOMD、油和 ME 的理想增加,用于放牧系统。不同草场的营养浓度会发生季节性变化;然而,草地之间养分浓度的差异可以通过存在和/或与阔叶植物混合的草种以及草成熟管理来最小化。
更新日期:2020-11-23
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