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首页> 外文期刊>Journal of Agronomy and Crop Science/Zeitschrift fur acker-und pflanzenbau >Maximising lucerne (Medicago sativa L.) production with fixed-length recovery intervals after defoliation in mild winter environments
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Maximising lucerne (Medicago sativa L.) production with fixed-length recovery intervals after defoliation in mild winter environments

机译：在轻度冬季环境中脱落后，最大化卢塞恩（Medicago Sativa L.）生产以固定长度的恢复间隔

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摘要

Lucerne (Medicago sativa L.) is an important temperate legume for livestock production systems. Lucerne requires a recovery period after a defoliation event so that taproot energy and nutrient stores can be replenished. A field experiment examined the effects of recovery period management following defoliation, on lucerne herbage production and nutritive value at two contrasting sites in Victoria, Australia. Sites were established at Rutherglen and Hamilton, using established SARDI Seven lucerne stands. Treatments were short recovery (SR; plots cut at 21-day intervals), long recovery (LR; plots cut at 42-day intervals), new shoots (NS; plots cut when new shoots from the crown were at least 2 cm long) and new shoots + flowering (NSF; as for NS but plots were left to grow to reach late flowering from late summer to mid-autumn). At each defoliation, measurements were made of phenology, dry matter production and herbage nutrient concentrations (neutral detergent fibre, crude protein, metabolisable energy and water-soluble carbohydrate %). Persistence was measured at approximately 6-month intervals. At both sites, lucerne persisted equally well in all treatments although SR showed some decline at Hamilton at the final measurement. LR led to a more productive pasture (in terms of cumulative dry matter, neutral detergent fibre, crude protein, metabolisable energy and water-soluble carbohydrate %) than the three other treatments. The results indicate that phenological management systems that allow lucerne to replenish reserves through late summer and autumn are unnecessary in mild winter environments.
机译：Lucerne（Medicago Sativa L.）是牲畜生产系统的一个重要的温带豆科。卢塞恩需要在落叶事件发生后的恢复期间，以便可以补充摘略的能量和营养商店。现场实验检测了落叶后恢复期管理的影响，在澳大利亚维多利亚维多利亚维多利亚两种染色位点的卢塞恩牧场生成和营养价值。使用已建立的Sardi Seven Lucerne Steps在卢瑟格伦和汉密尔顿建立了网站。治疗是短期恢复（Sr;地块以21天的间隔切割），恢复长（LR;点切入42天间隔），新芽（NS;当来自皇冠的新芽至少2厘米时切割）和新的射击+开花（NSF;至于NS，但留下的地块长达夏天到秋天的延迟开花）。在每个落叶处，测量由候选，干物质生产和牧草营养浓度（中性洗涤剂纤维，粗蛋白质，代谢能量和水溶性碳水化合物％）制成。持久性以约6个月的间隔测量。在这两个地点，卢塞恩在所有治疗中都持续得非常好，尽管SR在最终测量的汉密尔顿表现出一些下降。 LR导致更富有成效的牧场（就累积干物质，中性洗涤剂纤维，粗蛋白质，代谢素，可溶性能量和水溶性碳水化合物％）而不是三种其他治疗。结果表明，在轻度冬季环境中，允许卢塞恩通过深夜和秋季补充储备的毒品管理系统。

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