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首页> 外文期刊>Ciência e Agrotecnologia >Production, carbon and nitrogen in stover fractions of corn ( Zea mays L.) in response to cultivar development
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Production, carbon and nitrogen in stover fractions of corn ( Zea mays L.) in response to cultivar development

机译：玉米品种中玉米秸秆部分的产量，碳和氮响应品种的发展

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Changes in quantity and quality of corn crop stover can have a large impact on soil conservation and soil carbon (C) sequestration over large areas. The aim of this study was to evaluate changes in production, concentration and amount of C and nitrogen (N) in corn stover fractions due to cultivar development. Two field experiments were conducted in the city of Rol?￠ndia (Paran?? State, Brazil) using ten cultivars representing five technological levels: single cross hybrids, double or triple hybrids, commercial varieties, and creole cultivars. Plant heights and stalk, leaf, cob, husk and tassel weights were determined at final harvest. Elemental C and N analyses were performed in triplicate for each stover fraction. In general, the creole cultivars had greater height, more dry matter (kg ha -1) and C content (kg ha -1) in husks, leaves, tassels and stalks, particularly when compared to single cross hybrids or others hybrids. There was a direct relationship between C/N ratio and corn selection for husks in both years and for the others fractions in one study year. This was due to the combined effects of increasing C and decreasing N due to crop selection. Large differences were observed within the same technological levels for the evaluated properties, suggesting a wide variation in genetic background. The quantity and quality of stover fractions vary among cultivars and may affect their use for soil cover, animal feed, biomass energy and other applications.
机译：玉米秸秆秸秆数量和质量的变化可能对大面积土壤保持和土壤碳固存产生很大影响。这项研究的目的是评估由于栽培品种的发展，玉米秸秆组分中碳，氮（N）的产生，浓度和含量的变化。在Rol？ndia市（巴西Paraan省）进行了两个田间试验，使用了代表五个技术水平的十个品种：单杂交种，双重或三重杂交，商业品种和克里奥尔语品种。在最终收获时确定植物的高度和茎，叶，穗轴，果壳和的重量。对于每个秸秆分数，一式三份进行元素C和N分析。通常，与单个杂交杂种或其他杂种相比，甲壳类品种的壳，叶，流苏和茎秆具有更高的高度，更多的干物质（kg ha -1）和C含量（kg ha -1）。在一个研究年度中，稻壳的C / N比与玉米选择之间存在直接关系，而其他分数则与玉米选择有关。这是由于作物选择导致碳增加和氮减少的综合作用。在相同的技术水平内，对于所评价的特性观察到较大差异，表明遗传背景存在很大差异。秸秆部分的数量和质量因品种而异，可能会影响其用于土壤覆盖，动物饲料，生物质能和其他应用的用途。

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