Sánchez-Rodríguez Antonio Rafael, Del Campillo María Carmen, Torrent José
Departamento de Agronomía, Universidad de Córdoba, Córdoba, Spain.
J Sci Food Agric. 2017 Aug;97(10):3427-3432. doi: 10.1002/jsfa.8195. Epub 2017 Jan 26.
Zinc deficiency, a major problem in crops grown on soils low in available Zn, is even more important in phosphorus-rich soils. This work aimed to elucidate the effects of soil P and Zn levels, and of fertilizer application, on yield and Zn concentration in cereal grains.
Wheat and barley were successively pot-grown on 20 calcareous Vertisols low in available Zn and ranging widely in available P. Grain yield in the plants grown on the native soils was positively correlated with Olsen P but not with diethylenetriaminepentaacetic acid (DTPA)-extractable Zn except for wheat on P-rich soils. Grain Zn concentration was negatively correlated with Olsen P. Grain Zn uptake differed little among soils. Application of P to the soils increased grain yield insignificantly and P concentration significantly; however, it reduced grain Zn concentration (particularly at low Olsen P values). Applying Zn alone only increased grain Zn concentration, whereas applying P and Zn in combination increased yield and grain Zn concentration at low and high Olsen P values, respectively.
Applying P alone to plants grown on calcareous Vertisols low in available P and Zn may in practice reduce grain Zn concentrations while not increasing grain yield significantly. © 2016 Society of Chemical Industry.
锌缺乏是在有效锌含量低的土壤上种植作物的一个主要问题，在富磷土壤中这一问题更为突出。这项工作旨在阐明土壤磷和锌水平以及施肥对谷物产量和锌浓度的影响。
在20种有效锌含量低且有效磷含量差异很大的石灰性变性土上先后盆栽小麦和大麦。在原生土壤上生长的植株的籽粒产量与 Olsen 磷呈正相关，但除了在富磷土壤上种植的小麦外，与二乙烯三胺五乙酸（DTPA）可提取锌无关。籽粒锌浓度与 Olsen 磷呈负相关。不同土壤间籽粒锌吸收量差异不大。向土壤施磷对籽粒产量的增加不显著，但显著提高了磷浓度；然而，它降低了籽粒锌浓度（特别是在 Olsen 磷值较低时）。单独施锌仅提高了籽粒锌浓度，而在低 Olsen 磷值和高 Olsen 磷值时，同时施用磷和锌分别提高了产量和籽粒锌浓度。
在有效磷和锌含量低的石灰性变性土上种植的作物单独施磷在实际中可能会降低籽粒锌浓度，而不会显著提高籽粒产量。© 2016 化学工业协会。
