Morpho-agronomic characters of oat growing with humic acid and zinc application in different sowing times

Abstract

The objectives of the study were to determine the effects of humic acid (HA) and zinc (Zn) applications on winter tolerance and yield performance of oat (cv. Albatros) planted in winter and spring sowing times (ST). We conducted the study in the 2017/2018 growing season. The experimental layout was split-split plots with three replications. Sowing times (winter and spring) comprised of the main plots. Humic acid application (with HA and without HA) was in the sub-plots, and Zn application rates (0, 23 and 46 kg ha-1) were in the sub-sub-plots. Chlorophyll content of plants was measured at the heading stage, while plant height, panicle height, panicle weight, number of grain per panicle, weight of grains per panicle, harvest index and grain yield were determined at the harvest. The effects of HA and Zn applications in both ST increased the chlorophyll content, yield and yield components. The results showed that cold tolerance of oat plants can be increased by the application of HA and 46 kg ZnSO4.7H2O ha -1. Overall performance of winter season was better than spring; thus, oat can be cultivated in winter under warm winter climate conditions. In addition, the HA and Zn applications can be used for other cold sensitive plant species to increase the cold tolerance which is a prevalent environmental stress affecting productivity of crops.

Mutual effects of humic acid content and nitrogen sources for vegetative development and flowering of snapdragon (Antirrhinum majus L.)

“…It is essential to understand the plant-humic acid relationship properly in order to increase plant nutrient uptake [Peoples andCraswell 1992, Zhu et al 2001]. Recent studies have demonstrated that the concurrent application of humic acid and zinc can exert a positive influence on plants, leading to potential enhancements in yield and yield-related parameters [Hatami 2017, Kutlu andGulmezoglu 2020]. Insufficient zinc during development leads to a 50-70% drop in photosynthesis, varying with plant type and soil Zn levels.…”