The Utilization of Soybean Straw. I. Fiber Morphology and Chemical Characteristics

Abstract

To improve basic knowledge of the properties of soybean straw, its fiber properties, anatomical structure, and components were investigated in detail. Soybean straw contains less ash and silica than some non-woody biomass. Its stem and root have more lignin and holocellulose, but less nitrogen and protein contents than the pod. Additionally, it has much shorter and wider fibers, and the length-width ratio is also lower than other crop straws. Morphologically, there are three main tissues---the ground tissue, the vascular tissue, and the dermal tissue systems in the stem, and two different morphology portions -the intimal layer and the leathery layer -in the longitudinal-section of the pod. A variety of inorganic and metal elements are distributed across the whole stem or pod in different amounts. Lastly, the planetary ball-milled stem and pod are completely dissolved in 8% lithium chloride/dimethyl sulfoxide (LiCl/DMSO) solution. After regeneration, the lignin has the highest retention, followed by silica and sugars, but most of the ash can be removed in this process.

Soybean Straw, Corn Stover and Sunflower Stalk as Possible Substrates for Biogas Production in Croatia: A Review

“…Therefore, its biotransformation to biofuels cannot be easily conducted. [33][34][35][36] However, these lignocellulosic biomasses contain soluble, fermentable sugars (Table 4), natural intermediates in conversion to biofuels, but access to sugars is hindered by the recalcitrance of plant cell walls. Therefore, deriving sugars from this material requires mechanical, physical or chemical disruption.…”

Sustaining the properties of black soil in Central India through crop residue management in a conservation‐agriculture‐based soybean–wheat system

“…Soybean residue contains about 41.4% C, 2.8% N, 0.5% P, and 1.3% K (Almaz, Halim, Yusoff, & Wahid, 2017) and has a high nutrient recycling capacity. After systematically decomposing the residue, improved soil carbon, and thereby improved soil fertility (Liu et al, 2015). The narrow C:N ratio accelerated the mineralization process and facilitated nutrient release (Dong et al, 2019).…”

Fabrication of thermo-sensitive lignocellulose hydrogels with switchable hydrophilicity and hydrophobicity through an SIPN strategy

“…Firstly, a lignocellulose solution was prepared according to our previous studies. [29][30][31][32][33] EDApretreated pulp was added to 8% LiCl/DMSO solvent at room temperature with 2 wt% concentration. The suspension was continuously stirred for 24 h and then maintained at 65 C for 5 h under stirring to obtain a homogeneous solution.…”

“…Benetting from the prior studies of the LiCl/DMSO solvent system in our group, [29][30][31][32][33] ethylenediamine (EDA)-pretreated lignocellulose could be completely dissolved in LiCl/DMSO to afford a homogeneous solution under mild conditions (65 C). Dissolution of lignocellulose in LiCl/DMSO requires pretreatment by either ball-milling or EDA complexation.…”