GROWTH AND MICRONUTRIENT CONCENTRATION IN MAIZE PLANTS UNDER NICKEL AND LIME APPLICATIONS

ABSTRACT The experiment was conducted in a greenhouse located at the Federal University of Mato Grosso, Cuiaba-MT, from March to May 2012. The objective was to assess the effects of different rates of nickel application with and without liming on maize growth and micronutrient levels. The study was a randomized block design in a 2 x 5 factorial arrangement with four replicates, for a total of 40 plots, including with and without liming and five rates of nickel application, on a clayey Red Yellow Latosol (Oxisol, USDA classification and Ferralsol, FAO classification). Both lime and nickel applications influenced plant growth, reducing plant development with increased nickel application without liming. It was also observed that both lime and nickel applications altered micronutrient levels in the maize plants, independent of which part of the plant was evaluated. Nickel played an antagonistic role with manganese and zinc and a synergistic role with copper and iron.

摘要
本试验于2012年3月至5月在位于巴西马托格罗索州库亚巴市的马托格罗索联邦大学温室中开展，旨在评估施用不同梯度镍（nickel）用量，配合与不配合石灰施用时，对玉米生长及植株微量营养元素含量的影响。本研究采用2×5因子随机区组设计，设置4次重复，共计40个试验小区，因子组合为是否施用石灰与5个镍施用量梯度，供试土壤为黏质红黄色氧化土（Oxisol，美国农业部分类；Ferralsol，联合国粮农组织分类）。
研究结果显示，石灰与镍施用均可对植株生长产生影响：在不施用石灰的情况下，镍施用量增加会抑制植株发育。同时观测到，无论评估植株的哪个部位，石灰与镍施用均会改变玉米植株内的微量营养元素含量；镍与锰、锌表现为拮抗作用，与铜、铁则表现为协同作用。