Abstract：
In different regions of the world, arsenic (As) contaminated soils poses a serious threat to plant growth and its physiological processes. Organic amendments are a cost-effective and environmentally friendly way to improve plant growth under stress conditions in contaminated soils. In As polluted acidic ultisol, a greenhouse trial was conducted to investigate the protective effects of peanut straw biochar (PSB) and canola straw biochar (CSB) on soybean mineral nutrition, antioxidant enzymes, and physiological growth parameters. The current study used eighteen treatments with different levels of As ((1) 0 mg kg-1, (2) 30 mg kg-1, (3) 60 mg kg-1) and biochar (PSB and CSB) (0%, 1%, and 2%). The result suggests that biochar addition under As stress in highly weathered acidic ultisol soil increased soybean growth attributes and defense mechanisms. The PSB was more effective than the CSB in a dose-dependent manner. The application of 2% PSB in polluted soil resulted in significant increases in soybean height (58%), biomass production (root (44%) and shoot length (52%)), chlorophyll contents (92%), soybean functional leaves (62%), total soluble sugars (TSS) (71%) and base cations (Ca2+, Mg2+, K+, Na+). However, biochar application decreased proline, MDA, H2O2, and O2- by 64%, 82%, 49%, and 45% respectively. Furthermore, biochar application increased (Phosphate) P and As uptake in soybean, with PSB application exhibiting a greater increase than CSB application. As a result, crop straw-derived biochar can reduce As-induced soybean plant damage and insert a protective effect in As-contaminated acidic ultisol soils.
摘要：
在世界不同地区,砷（As）污染的土壤对植物生长及其生理过程构成严重威胁。有机改良剂是一种经济有效且环保的方法，可在受污染土壤的胁迫条件下改善植物生长。在被污染的酸性多溶胶中，进行了一项温室试验，以研究花生秸秆生物炭（PSB）和油菜秸秆生物炭（CSB）对大豆矿物质营养的保护作用。抗氧化酶，和生理生长参数。目前的研究使用了18种不同水平的As（（1）0mgkg-1，（2）30mgkg-1，（3）60mgkg-1）和生物炭（PSB和CSB）（0％，1%,和2%）。结果表明，在高度风化的酸性土壤中，在As胁迫下添加生物炭增加了大豆的生长属性和防御机制。PSB以剂量依赖性方式比CSB更有效。在污染土壤中施用2％PSB导致大豆高度显着增加（58％），生物量生产(根(44%)和茎长(52%))，叶绿素含量（92%），大豆功能叶（62%），总可溶性糖（TSS）（71%）和碱性阳离子（Ca2+，Mg2+,K+,Na+）。然而,生物炭应用减少脯氨酸，MDA,H2O2和O2+64%，82%,49%,分别为45%。此外，生物炭的应用增加了大豆对磷和砷的吸收，PSB应用表现出比CSB应用更大的增长。因此,作物秸秆衍生的生物炭可以减少As引起的大豆植物损害，并在As污染的酸性多重质土壤中发挥保护作用。
