The Effect of Mg and S on Photosynthesis Products and Nitrogen Content in Winter Wheat

Abstract

In 2013 and 2014, field experiments involving winter wheat were conducted at Aleksandras Stulginskis University's Experimental Station on a medium-textured Cal(ca)ri-Epihypogleyic Luvisol. N150P90K120 were applied as the main fertilizers. Additionally, a foliar fertilizer including amide nitrogen, sulphur and magnesium (MgO concentrations ranging from 0.25 % to 2.5 %), (further referred to as magnesium fertilizer), was sprayed at the tillering and booting stages of winter wheat. It was found that magnesium fertilizer foliar-applied at the end of tillering and booting stages tended to increase chlorophyll a and b contents in winter wheat leaves. Chlorophyll a content in leaves significantly increased when the solution with 2.5 % concentration of magnesium had been applied at tillering and when 0.5, 1.0 and 2.5 % concentrations of the solution had been applied at booting stages. Chlorophyll b content in winter wheat leaves was significantly affected by the solutions with 0.5, 1.0 and 2.5 % magnesium concentrations at tillering and by the solutions with 0.5, 1.0, 1.5, 2.0 and 2.5 % magnesium concentrations at booting stages. The highest increase in dry matter content was recorded when 2.5 % MgO solution had been applied at booting stage. A statistically significant correlation was established between the MgO concentrations applied at tillering (r = 0.905 * ) and booting (r = 0.863 * ) stages and nitrogen content in winter wheat dry matter.

Effect of magnesium fertilizer combined with straw return on nitrogen use efficiency

“…Similarly, Dromantienė et al. (2017) observed that foliar application of Mg at various stages of wheat development provided the highest increase in DM and yield. Magnesium fertilizer application can not only improve the chlorophyll concentration and reduce protein depletion, but it can also enhance the total plant biomass and increase crop yields (Hauer‐Jákli & Tränkner, 2019).…”

“…Many studies have proven that optimal application of Mg fertilizer can improve the chlorophyll, N, K, Mg, and other nutrient contents of the crop, thus improving the biomass and economic yield (Ferdous, Anwar, Haque, Mahamud, & Hossain, 2014;Laxminarayana & Susan John, 2014). Similarly, Dromantienė et al (2017) observed that foliar application of Mg at various stages of wheat development provided the highest increase in DM and yield. Magnesium fertilizer application can not only improve the chlorophyll concentration and reduce protein depletion, but it can also enhance the total plant biomass and increase crop yields (Hauer-Jákli & Tränkner, 2019).…”

Magnesium accumulation, partitioning and remobilization in spring maize (Zea mays L.) under magnesium supply with straw return in northeast China

“…Numerous studies have been addressed that Mg fertilizers significantly increase the straw yield of the shoots, and the total DM of a maize crop influences the grain yield . Similarly, Dromantien et al . observed that foliar application of Mg at various stages of wheat growth provided highest increase in DM and yield.…”