Effect of High Humic Substance Levels on Growth and Nutrient Concentration of Corn under Calcareous Conditions

Abstract

2 This study investigated the effect of high humic substance (HS) levels (0, 500, 1000, and 2000 mg HS kg −1 ) on growth and nutrient concentrations of corn grown on calcareous soils. For these, soil samples were collected from the six different provinces of Turkey. According to the average values, HS levels had no significant effect alone on dry weight, nitrogen (N), potassium (K), calcium (Ca), magnesium (Mg), iron (Fe), zinc (Zn), copper (Cu), and manganese (Mn) concentrations. Soil differences significantly affected dry weight, N, Mg, and Cu concentrations (p ≤ 0.05). Looking at HSxsoil interactions on K, Ca, Fe, and Mn concentrations, it could be seen that there was no effect or that the effect was negative. Only plant Fe concentrations obtained from Konya and Urfa provinces were positively affected from HSxsoil interaction. It was concluded that high level of HS had no or negative effect on corn growth and some nutrient concentration under calcareous conditions.

Assessment of Heavy Metal Amounts of Spinach Plants (<i>Spinach Oleracea</i> L.) Grown on Cd and Chicken Manure Applied Soil Conditions

“…Kamari et al [42] also reported the immobilization of heavy metals in soil with manure applications in some studies and depended on the effectiveness of stabilization to the nature of contaminants, physical and chemical characteristics of the amendment and also the type of soil. On the other hand formation of organa-metal compounds may increase the solubility of heavy metal and availability in plants [37]. Parallel to the findings of us, Arroyo et al [43] also pointed increased concentrations of Cu in plants grown on the poultry manure amended soils.…”

“…It has been stated that humic acids are effective on plant growth and development, and when applied in small quantities, it positively affects the development of plants. However, when applied in large quantities, ineffective or even quite negative effects on development were also reported [37].…”

Unveiling the Efficiency of Vermicompost Derived from Different Biowastes on Wheat (Triticum aestivum L.) Plant Growth and Soil Health

“…Similarly, minimum aphid population was also noticed in the same treatment (Figure 1). Leventoglu and Erdal, stated that higher levels of organic matters can bind soil nutrients as unavailable forms, thus plants cannot grow better in the terms of yield and quality traits [55]. Due to large particulate surface areas, vermi-composts provide many micro sites for microbial activity and for the strong retention of nutrients [56].…”

Uncoupling of sodium and chloride to assist breeding for salinity tolerance in crops

“…Of the humic substances, coal‐derived potassium (K + ) and Na + humate are produced commercially for agricultural and industrial use, but surprisingly there is very little in the scientific literature on the effects of these types of commercial humates on plant growth or yield. The limited studies to date have reported mixed results (Sharif et al ., ; Van Tonder, ; Tahir et al ., ; Turan et al ., ; Leventoglu & Erdal, ). Our preliminary experiments investigating ameliorative effects of Na + humate on salinity‐stressed barley, bread wheat and durum wheat showed that at all salinities, Na + humate (2–4 g kg −1 potting mix) reduced plant growth at heading by 10–20% depending on cereal species and degree of salinity stress (Supporting Information Fig.…”