...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Grass and forage science: the journal of the British Grassland Society. >Benefits of mixing grasses and legumes for herbage yield and nutritive value in Northern Europe and Canada. (Special Issue: Forage legumes.)
【24h】

Benefits of mixing grasses and legumes for herbage yield and nutritive value in Northern Europe and Canada. (Special Issue: Forage legumes.)

机译：在北欧和加拿大，混合使用草类和豆类植物可提高牧草产量和营养价值。 （特刊：饲草科植物。）

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Increased biodiversity may improve ecosystem services, including herbage yield. A mixture experiment was carried out at five sites in Northern Europe and one in Canada to investigate whether mixtures of grasses and legumes would give higher herbage yield than monocultures. Resistance of the mixtures to weed invasion and nutritive value of the herbage were also investigated. The experimental layout followed a simplex design, where four species differing in specific functional traits, timothy (Phleum pratense L.), smooth meadow grass (Poa pratensis L.), red clover (Trifolium pratense L.) and white clover (Trifolium repens L.), were grown in monocultures and eleven different mixtures with systematically varying proportions of the four species. Positive diversity effects (DE) were observed, leading to greater herbage dry-matter (DM) yield in mixtures than expected from species sown in monocultures. For centroid mixtures, the DE generated on average an additional 32, 25 and 21% of the DM yield than would be expected from the monocultures in the first, second and third year respectively. On average, the mixtures were 9, 15 and 7% more productive than the most productive monoculture (transgressive overyielding) in the first, second and third year respectively. These benefits persisted over the three harvest years of the experiment and were consistent among most sites. This positive effect was not accompanied by a reduction in herbage digestibility and crude protein concentration that is usually observed with increased DM yield. Mixtures also reduced the invasion of weeds to <5% of herbage yield compared to monocultures (10-60% of herbage yield).
机译：增加的生物多样性可以改善生态系统服务，包括牧草产量。在北欧的五个地点和加拿大的一个地点进行了混合实验，以调查草和豆类的混合物是否比单作栽培具有更高的牧草产量。还研究了混合物对杂草入侵的抵抗力和牧草的营养价值。实验布局遵循单纯形设计，其中四个物种在特定的功能性状上有所不同，其中包括提摩太（Phleum pratense L.），光滑的草地草（Poa pratensis L.），红三叶草（Trifolium pratense L.）和白三叶草（Trifolium repens L）。 ）种植在单一养殖和11种不同的混合物中，四种物种的比例有系统地变化。观察到积极的多样性效应（DE），导致混合物中的牧草干物质（DM）产量比单培养中播种的预期产量高。对于质心混合物，DE分别比第一年，第二年和第三年的单培养预期平均多出32％，25％和21％的DM产量。平均而言，第一，第二和第三年的混合物分别比生产力最高的单一养殖（过度生产）高9、15和7％。这些益处在实验的三个收获年中一直存在，并且在大多数地点之间是一致的。这种积极作用并没有伴随着草类消化率和粗蛋白浓度的下降，而DM产量的增加通常会导致这种现象。与单一栽培相比（杂草产量的10-60％），混合物还使杂草的入侵减少至草产量的<5％。

著录项

相似文献

  • 外文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号