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首页> 外文期刊>Journal of plant nutrition and soil science >Uptake and nutrient balance of nitrogen, sulfur, and boron for optimal canola production in eastern Canada
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Uptake and nutrient balance of nitrogen, sulfur, and boron for optimal canola production in eastern Canada

机译：加拿大东部最佳油菜生产的氮，硫和硼的摄取和营养平衡

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Balanced plant nutrition is essential to achieve high yields of canola (Brassica napus L.) and get the best economic return from applied fertilizers. A field study was conducted at nine site-years across eastern Canada to investigate the effects of nitrogen (N), sulfur (S) and boron (B) fertilization on canola nutrient uptake, nutrient balance, and their relationship to canola yields. The factorial experiment consisted of four N rates of 0 (N0), 50 (N50), 100 (N100), and 150 (N150) kg ha(-1), two S rates of 0 (S0) and 20 (S20) kg ha(-1), and three B treatments of 0 (B0), 2 kg ha(-1) at preplant (B2.0P), and 0.5 kg B ha(-1) foliar-applied at early flowering stage (B0.5F). Each site-year used the same experimental design and assigned treatments in a randomized complete block design with four replications. Fertilizer S application greatly improved seed yields at six out of nine site-years, and the highest N use efficiency was in the N150+S20 treatment. Sulfur application generally increased seed S concentration, seed S removal, and plant total S uptake, while B fertilization mainly elevated straw B concentration and content, with minimal effect on seed yields. At the early flowering stage, plant tissue S ranged from 2.2 to 6.6 mg S g(-1), but the N : S ratio was over or close to the critical value of 12 in the N150+S0 combination at five site-years. On average across nine site-years, canola reached a plateau yield of 3580 kg ha(-1) when plants contained 197 kg N ha(-1), 33 kg S ha(-1) and 200 g B ha(-1), with a seed B content of 60 g B ha(-1). The critical N, S, and B values identified in this work and their potential for a posteriori nutrient diagnosis of canola should be useful to validate fertilizer requirements for canola production in eastern Canada.
机译：均衡的植物营养对于实现高产水桶（Brassica Napus L.）至关重要，并获得应用肥料的最佳经济回报。在加拿大东部的九个遗址域进行了一个田间研究，以研究氮（N），硫（B）施肥对油菜营养吸收，营养平衡及其与油菜产量的关系的影响。阶乘实验由四个0（n0），50（n50），100（n100）和150（n150）kg ha（-1），0（s0）和20（s20）kg在早开花阶段（B0型），在预瓣（B2.0P）和0.5kg B ha（-1）叶面涂覆的叶片（b2.0p）和0.5kg b ha（-1）叶面（b0。 5f）。每个站点对随机完整块设计中使用相同的实验设计和分配治疗，具有四种复制。肥料S应用大大提高了九个遗址六个年的种子产量，最高使用效率在N150 + S20处理中。硫磺应用一般增加了种子S浓度，种子的去除和植物总摄取，而B施肥主要升高的秸秆B浓度和含量，对种子产量的最小影响。在早期开花阶段，植物组织S的范围为2.2至6.6mg S g（-1），但N：S比在5个位点的N150 + S0组合中的临界值或接近临界值。平均跨越九个遗址 - 当植物含有197 kg n ha（-1），33kg s ha（-1）和200 g b ha（-1）时，油菜达到3580 kg ha（-1）的平台产量，种子B含量为60g（-1）。在这项工作中鉴定的临界N，S和B值及其对油菜的后验营养诊断的潜力应该有助于验证加拿大东部生产油菜生产的肥料要求。

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