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首页> 外文期刊>Australian Journal of Crop Science >Nutrients optimum range (NOR) based on DRIS method to assess the nutritional status of the first ratoon sugarcane
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Nutrients optimum range (NOR) based on DRIS method to assess the nutritional status of the first ratoon sugarcane

机译：基于DRIS方法的营养最佳范围（NOR）评估第一个再生甘蔗的营养状况

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The development of nutrients optimum range (NOR) is quite important for the ratoon sugarcane (Saccharum spp.) to help decision making of fertilizers management. The purpose of this study was to establish NOR from statistical models of relationship between leaf nutrient content (LNC) and DRIS indices. In this study, the nutritional status of the first ratoon sugarcane crop was assessed based on NOR. The study was performed using data from the first ratoon sugarcane obtained from commercial fields, in the southern region of Goiás State, in Brazil. Yield data from plots (average acreage 20 ha) and LNC of macro- and micronutrients in 2012/2013 cropping season were stored in a database. The procedure to define the reference population (high-yielding subpopulation) consisted of plots with above-average yield + 2/3 standard deviation (over 200.94 tonnes ha-1). The average and coefficient of variation for each dual ratio between nutrient concentration (N/P, N/K, N/Ca, etc.) were measured in the high-yielding subpopulation, which was considered the DRIS norms. Based on DRIS norms at the first ratoon sugarcane, it was possible to develop NOR and assess the nutritional status of sugarcane crop. The evaluation of the nutritional status using the NOR indicated that K (87.36%), P (81.82%), Zn (67.27%) and Cu (76.36%) were the nutrients that showed the most deficiency among the plots assessed. On the other hand, N (69.09%), Ca (60%) and S (70.91%) were the most excess nutrients.
机译：养分最佳范围（NOR）的制定对于再生甘蔗（Saccharum spp。）有助于肥料管理的决策至关重要。这项研究的目的是从叶片养分含量（LNC）与DRIS指数之间关系的统计模型中建立NOR。在这项研究中，基于NOR评估了第一株再生甘蔗作物的营养状况。这项研究是使用巴西戈亚斯州南部地区从商业田获得的第一个再生甘蔗的数据进行的。数据库/数据库中存储了2012/2013种植季节的地块（平均耕地面积20公顷）和大量和微量元素LNC的产量数据。定义参考种群（高产亚种群）的程序由产量高于平均水平+ 2/3标准差（超过200.94吨ha-1）的地块组成。在高产子种群中测量养分浓度（N / P，N / K，N / Ca等）之间每个对偶比率的平均值和变异系数，这被认为是DRIS规范。根据第一批再生甘蔗的DRIS规范，可以开发NOR并评估甘蔗作物的营养状况。使用NOR进行的营养状况评估表明，在所评估的样地中，最缺乏的养分是钾（87.36％），磷（81.82％），锌（67.27％）和铜（76.36％）。另一方面，氮（69.09％），钙（60％）和硫（70.91％）是最过量的营养素。

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