最佳养分管理下我国花生磷需求特征

Phosphorus Uptake Behavior of Peanut Under Optimum Fertilization Management in China

评价花生荚果产量和植株磷素需求,为高产花生的施肥管理提供理论指导。收集1990—2021年我国主要花生种植区的大量田间试验数据集(n=265),以评估在最佳施肥管理下花生的磷吸收特征。结果表明,在整个数据集中,平均花生荚果产量和收获指数(HI)分别为4642 kg/hm^(2)和0.54。花生荚果对磷(P)的平均需求量为6.45 kg/t。在<3、3~<4、4~<5、5~6和>6 t/hm^(2)5个荚果产量范围内,磷素吸收和HI均随荚果产量的增加而增加。磷需求量随着产量的增加而增加,这归因于在荚果产量高的情况下,秸秆磷的过量吸收。

Assessing pod yield and plant phosphorus demand can provide theoretical guidance for fertilization management of high yielding peanut(Arachis hypogaea L.).Following this rationale,a large dataset was collected from field experiments(n=265)across the main peanut planting regions of China for a period spanning from 1990 to 2021 to evaluate nutrient uptake behavior of peanut under current optimum fertilization management.Across the entire dataset,the results showed that average peanut pod yield and harvest index(HI)were 4642 kg/hm^(2) and 0.54.The average peanut phosphorus(P)requirement was 6.45 kg/t.Across five ranges of pod yields(<3,3-<4,4-<5,5-6,and>6 t/hm^(2)),both nutrient uptake and HI increased with increasing pod yield.The P requirement increased with yield,attributed to an increase in straw P concentration as P luxury uptake occurs under high pod yield.