Allelopathic appraisal effects of straw extract wheat varieties on the growth of corn

Abstract

Allelopathy is a process in which secondary metabolites produced by plants, micro-organisms, viruses and fungi control growth and development of other biological systems. Some plants may beneficially or antagonistically affect other plants through allelochemical compounds which may be released directly or indirectly from live or dead parts and cause allelopathic and phytotoxic effects. In Kerman province of Iran, cultivating corn after winter wheat usually causes less growth and yield, hence, this study was conducted to estimate the effects of different concentrations of two native Iranian wheat (Alvand and Falat) straw extracts on germination, radicle growth, coleoptile length, plant height, leaf area (LA), wet weight (WW) and dry weight (DW) of two hybrid corn varieties (single cross 704 and 647). Results showed that the straw extracts had significant negative allelopathic effects on both corn varieties' growth. Furthermore, based on the study results, we suggest that before corn cultivation, wheat straw and residues should be eliminated from the field by leaving no-till fields fallow to avoid negative allelopathic effects of wheat straw on corn growth.

Growth Performance and Immunity of Broilers Fed Sorghum–Soybean Meal Diets Supplemented with Phytases and Β-Mannanases

“…The heterophile/lymphocyte ratio showed a 55% reduction when β-mannanases were provided compared to when the diet lacked the enzyme, as previously reported [ 28 , 29 ]. A reduction in this parameter has been associated with increased immunity, which is likely attributable to the reduction in stress among the broilers.…”

Effects of fermented rapeseed meal on performance, intestinal morphology, the viscosity of intestinal content, phosphorus availability, and egg quality of laying hens

“…This may also be the result of a decrease in the viscosity of intestinal content. Reducing the viscosity of intestinal content can increase the length and width of the villi and subsequently increase their surface area ( Mehri et al, 2010 ). The obtained results may indicate that FRSM can be an energy and building material for intestinal mucosa.…”

Dietary supplementation with β-mannanase and probiotics as a strategy to improve laying hen performance and egg quality

“…Daskiran et al ( 28 ) demonstrated that diets that used β-mannanase significantly reduced the water of total fecal production in broilers. Likewise, Mehri et al ( 29 ) demonstrated that the viscosity of digesta from the jejunum of broiler chickens decreased in diets with the enzyme. The cleaner eggs observed in the probiotic treatment can likely be attributed to the enhanced stability of the intestinal microbiota and lower count of opportunistic bacteria.…”