Herbage Production, Nutritive Value and Grazing Preference of Diploid and Tetraploid Perennial Ryegrass Cultivars (Lolium perenne L.)
Herbage Production, Nutritive Value and Grazing Preference of Diploid and Tetraploid Perennial Ryegrass Cultivars (Lolium perenne L.)
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二倍体和四倍体多年生黑麦草品种（Lolium perenne L.）的牧草产量、营养价值和放牧偏好
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
I. López
中科院分区：
文献类型：
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作者：
O. Balocchi;I. López
本研究旨在研究在智利南部土壤和气候条件下，多年生黑麦草（Lolium perenne L.）品种倍性对牧草产量、营养价值、放牧偏好和牧草利用的影响。这项研究在智利南部的瓦尔迪维亚省进行，并进行了为期3年的评估。四倍体品种为四重奏（4n）、格温达尔（4n）、田园（4n）和拿破仑（4n）。二倍体品种为Anita （2n）、Jumbo （2n）、Aries （2n）和Yatsyn 1 （2n）。当平均草甸高度达到20 cm时，所有样地同时放牧24 h。放牧前后对草甸高度、干物质有效性和营养价值进行评价。在下午挤奶后的2.5 h内，每5分钟对放牧偏好进行一次视觉评估。在3年期间，对20个放牧事件进行了评价。试验采用随机完全区组设计，共8个品种，3个重复。二倍体
The objective of this study was to determine, under the soil and climatic conditions of Southern Chile, the effect of the ploidy of perennial ryegrass (Lolium perenne L.) cultivars on herbage production, nutritive value, grazing preference and utilization of pasture produced. This study was conducted in southern Chile, Valdivia Province, and was evaluated for 3 years. The tetraploid cultivars used were Quartet (4n), Gwendal (4n), Pastoral (4n) and Napoleon (4n). The diploid cultivars were Anita (2n), Jumbo (2n), Aries (2n), and Yatsyn 1 (2n). When the average sward height reached 20 cm, all plots were simultaneously grazed by dairy cows for a period of 24 h. Before and after grazing, sward height, dry matter availability and nutritive value were evaluated. Grazing preference was visually assessed every 5 min for a period of 2.5 h after the afternoon milking. During the 3-year period 20 grazing events were evaluated. A randomized complete block design, with eight cultivars and three replicates, was used. Diploid