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植物生长受最小养分律的支配,随着大量元素施用量的增加,许多微量元素对作物的反应明显地表现了出来.在关中石灰性土壤上,微量元素锌对玉米等作物的反应,由于磷肥的大量施用,表现尤为突出.近年来,对磷锌关系的研究已有不少报导.我们对关中石灰性土壤上玉米磷锌关系的研究结果表明,在有效磷和有效锌都缺的土壤上,单施磷、锌的效果都不如磷锌配合施用好.单施磷量过多,往往会诱发缺锌,导致作物减产.当磷锌施量配比适当,磷锌的交互作用和综合效应最大,产量最高.本试验的目的在于通过对关中地区不同肥力的石灰性土壤上玉米磷锌关系的盆栽试验,探讨磷、锌施用量的最佳配比,为合理施用磷锌肥提供依据.一、试验的基本情况盆栽试验的供试土壤采自西北农学院教学试验农场农作一站四区(塿,高肥力,土样代号为81001),农化试验地(塿土,中等肥力,代号为81002)和陕
Plant growth is dominated by the minimum nutrient law, with the increase in the application of large amounts of elements, many of the trace elements of the crop response was clearly manifested in the Guanzhong calcareous soil, trace element zinc on corn and other crops, the reaction of phosphate fertilizer In recent years, there has been a lot of reports on the relationship between phosphorus and zinc.Our results on the relationship between phosphorus and zinc in maize in Guanzhong calcareous soil show that on the soil lacking both available and available Zn , The effect of single application of phosphorus and zinc are not as good as the application of phosphorus and zinc.Optimum application of too much phosphorus often induces zinc deficiency and leads to the decrease of crop yield.When the proportion of phosphorus and zinc is appropriate and the interaction between phosphorus and zinc and the comprehensive effect Maximum and maximum yield.The purpose of this experiment is to explore the relationship between the ratio of phosphorus and zinc in potted plants of calcareous soil with different fertility in the Guanzhong area by pot experiment to provide the basis for the rational application of phosphorous and zinc fertilizer. First, the basic situation of the test potted soil test for the test was collected from Northwest Agricultural College teaching experimental farm farms four stations (塿, high fertility, soil code 81001), agro-experimental sites (soil, medium fertility, generation No. 81002) and Shaanxi