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首页> 外文期刊>Revista de Ciências Agrárias >Características estruturais, valor nutricional do capim-Tifton 85 sob doses de nitrogênio em diferentes idades de rebrota no semiárido
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Características estruturais, valor nutricional do capim-Tifton 85 sob doses de nitrogênio em diferentes idades de rebrota no semiárido

机译：半干旱地区不同生育年龄下氮素剂量下Tifton 85草的结构特征，营养价值

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p xmlns=""The objective of this study was to evaluate the structural, productive and nutritional value of Tifton 85 grass fertilized with two nitrogen doses at four regrowth ages. The experimental design was a randomized block in a factorial 4 x 2, with four regrowth ages (28, 35, 42 and 49 days) and two levels of nitrogen (100 and 300 kg hasup-1/sup) in six replicates, totaling 48 experimental units, of 25 msup2/sup (5x5m) each. The blocking criterion was the variation in the experimental area. Dry matter production increased linearly, on average 56.4%, as the regrowth age increased from 28 to 49 days (P0.01). Among the N rates, there was a 17.2% increase in dry matter yield when fertilized with 300 kg / ha of nitrogen. The height of the plants (P 0.01), as well as the number of live leaves (P 0.01), number of expanded leaves (P 0.01) and the final leaf length (P 0.01) increased linearly with the advancement of cut age. Fertilization of Tifton 85 grass with 100 kg hasup-1/sup of N, managed every 35 days improves the dry matter production, structural characteristics and nutritional value of forage for cutting and / or grazing./pp xmlns=""
机译：xmlns =“”>这项研究的目的是评估在四个再生年龄使用两种氮肥施肥的Tifton 85草的结构，生产和营养价值。实验设计是4×2阶乘的随机区组，其中四个再生年龄（28、35、42和49天）和两个水平的氮（100和300 kg ha -1 ）重复六次，总共48个实验单位，每个重复25 m 2 （5x5m）。阻断标准是实验区域的变化。随着重生年龄从28天增加到49天，干物质生产线性增加，平均增长56.4％（P <0.01）。在氮肥中，以300 kg / ha的氮肥施肥可使干物质产量增加17.2％。植物的高度（P <0.01），活叶数（P <0.01），膨胀叶数（P <0.01）和最终叶长（P <0.01）随叶片高度的增加而线性增加。减少年龄。每35天施以100 kg ha -1 N的Tifton 85草的施肥措施，可以改善割草和/或放牧用牧草的干物质生产，结构特征和营养价值。 < p xmlns =“”>

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