Effect of Humic Substance Applications on Mineral Nutrition and Yield of Granny Smith and Jersey Mac Apple Variet

Abstract

This study was conducted to examine the effect of soil, leaf and soil+leaf applications of humic substance on fruit yield, some quality parameters and mineral nutrition of Granny Smith and Jersey Mac apple varieties grafted on MM106 rootstock. The study was carried out for two consecutive years. According to the results obtained from both years, humic substance applications had no significant effect on fruit yield and quality parameters generally, but relative increases were recorded in yields. Leaf N, K, Ca, Fe and Zn concentrations were significantly affected from the applications. At the first year, humic substance application significantly affected only N and K concentrations of Jersey Mac variety, but in the second year, humic substance applications led to increase in leaf N, K, Ca, Fe and Zn concentrations in Granny Smith and N concentration in Jersey Mac apple variety. According to the results obtained, it can be said that the effects of humic substances were higher than the first year's effects mostly.

The Chlorophyll, Macronutrients and Carbohydrates in Apple Leaves “Crystal Variety” as Affected by the Addition of Compound Fertilizer and Humus

“…Additionally, adding humic material to the soil may increase the content of other important elements in the leaves besides nitrogen in chlorophyll formation. has observed [33] that adding humic material TKI HUMUS (12% humic and fulvic acids) to apple trees of Grany Smith and Jersey Mac varieties led to a significant increase in the iron concentration in the leaves. The role of iron in chlorophyll formation, as mentioned earlier, is undeniable.…”

Effect of humic substances on yield and nutrient contents of Eggplant Santana (Solanum melongena) plants in gray-brown soil

“…Because of the different contribution ways on plant growth, humic substances are used in different areas of agriculture (Chen and Aviad, 1990). Owing to chelating properties of humic substances with metallic cations, availability of many nutrients increase and thus plant growth is affected positively (Cansu and Erdal, 2018). Additionally, humic substances increase root and root hair growth leading to expanded root surface area and thus nutrient uptake capacity increases (Pinton et al, 1999;Cesco et al, 2002).…”