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首页> 外文期刊>International Journal of Forestry Research >Postplanting Nutritional Augmentation of Jeffrey Pine Seedlings on an Infertile Sierran Site
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Postplanting Nutritional Augmentation of Jeffrey Pine Seedlings on an Infertile Sierran Site

机译：不育不育系站点上杰弗里·松苗的种植后营养增强

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Broadcast fertilization with an array of amendments was investigated for its capacity to stimulate growth and enhance nutrition of a three-year-old Jeffrey pine (Pinus jeffreyiGrev. & Balf.) plantation growing on an acidic Sierra Nevada surface mine. Four formulations that differed in N source, duration of release, and the suite of nutrients provided were evaluated, with each applied using four rates. Free Flow 29-3-4, a conventional amendment featuring urea as its near exclusive N source, and High N 22-4-6, a controlled release formulation containing ammoniacal, nitrate, and urea N, were the most stimulatory while an organic formulation relying exclusively on a municipal biosolid N source, Milorganite 6-2-0, was the least so. The lowest application rates employed were inadequate while the most advantageous was not the highest rate for any formulation. Foliar analysis revealed that improved N nutrition was probably critical in the favorable growth responses to fertilization, that of P was a likely contributor, and amelioration of potential Mn toxicity may have assumed an accessory role.
机译：对播种施肥进行了一系列修正，以研究其在酸性内华达山地表矿山上生长的三年龄的杰弗里·松（Pinus jeffreyiGrev。＆Balf。）人工林的生长和增强营养的能力。评价了四种在氮源，释放持续时间和提供的养分方面有所不同的配方，每种配方使用四种比率。 Free Flow 29-3-4是一种常规的改良剂，它以尿素作为其几乎唯一的N源，而High N 22-4-6是一种含有氨，硝酸盐和尿素N的控释制剂，其刺激性最高，而有机制剂最少依赖于市政生物固体氮源，Milorganite 6-2-0。对于任何制剂，所采用的最低施用量不足，而最有利的不是最高施用量。叶面分析表明，改善氮素营养可能对施肥有利的生长反应至关重要，磷元素可能是促进磷肥的作用，而潜在锰毒性的改善可能起了辅助作用。

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