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Sulfur partitioning and grain concentration differed from that for nitrogen in malting barley
Field Crops Research ( IF 5.8 ) Pub Date : 2021-01-20 , DOI: 10.1016/j.fcr.2020.108053
Federico M. Gómez , Pablo Prystupa , José J. Boero , Flavio H. Gutiérrez-Boem

Nutrient uptake per unit grain yield (i.e. the ratio between nutrient uptake and grain yield) is an index of the amount of nutrient available for partitioning to the grain. It can be divided into two components: grain nutrient concentration and nutrient harvest index. The aim of the present study was to analyze and compare the relationships between nutrient uptake per unit grain yield and its components for N and S in malting barley (Hordeum vulgare L.). Fifty field experiments were conducted with treatments that included farmer fertilization rate, +S, +N and + NS. Grain nutrient concentration was positively related to nutrient uptake per unit grain yield for N and S in a curvilinear fashion. However, grain N concentration tended to increase threefold while S concentration doubled as nutrient uptake per unit grain yield increased. Nutrient harvest index showed a constant phase and, after exceeding a certain threshold, a negative association with nutrient uptake per unit grain yield was observed. However, the decrease in S harvest index was far steeper than in N harvest index. Therefore, contrary to what was observed for N, grain S concentration would be hard to modify through sulfur addition, since a high proportion of the absorbed S would be partitioned to the straw.



中文翻译:

麦芽大麦中的硫分配和籽粒浓度与氮不同

每单位谷物产量的养分吸收量(即养分吸收量与谷物产量之间的比率)是可分配给谷物的养分量的指标。它可以分为两个部分:谷物养分浓度和养分收获指数。本研究的目的是分析和比较麦芽大麦(大麦(Hordeum vulgare)中单位谷物产量的养分吸收与N和S的组成)之间的关系。L.)。进行了五十次田间试验,处理方法包括农民施肥率,+ S,+ N和+ NS。氮和硫的曲线养分中,养分浓度与单位产量养分吸收呈正相关。但是,随着每单位谷物产量养分吸收的增加,籽粒氮含量倾向于增加三倍,而硫含量则增加一倍。营养收获指数显示出一个恒定的阶段,超过一定阈值后,观察到与每单位谷物产量的养分吸收呈负相关。但是,S收获指数的下降幅度远大于N收获指数的下降幅度。因此,与对N观察到的相反,由于高比例吸收的S会分配到稻草中,因此很难通过添加硫来改变S的浓度。

更新日期:2021-01-20
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