ABSTRACT

Silicon, the second most abundant element on the Earth crust, is often considered beneficial for plant nutrition. However, plant available fraction of silicon (Si) is hard to find and extract from many types soils. Soil reaction (pH), temperature and plant uptake are some of the major determinants of Si availability affecting its extraction from soil. In this experiment, neutral, acidic and alkaline soils along with plant samples (whole rice plant) have been collected from farmer’s field. Plant samples were processed following existing procedure. Soils are air dried, grinded and passed through a 2 mm pore sieve. Four levels of shaking time (0, 5, 10 and 20 minutes and denoted as S₀, S₅, S₁₀, and S₂₀,respectively) @ 120rpm (round per minute) and four levels of temperatures (room temperature or 25°C, 60°C, 80°C, and 100°C; denoted as T₀, T₆₀, T₈₀ and T₁₀₀, respectively) were employed for preparation of aliquot from soil-water (1:10 ratio) suspension. Acidic and alkaline soils have higher extractable silicon than neutral soil. Combined effect of shaking time and temperature released higher Si values than control, amongst which Si extracted from S₂₀T₁₀₀ treatment is significantly correlated with Si content in rice and have better result for all soils in common.

摘要

硅是地壳中含量第二丰富的元素，通常被认为对植物营养有益。然而，很难从许多类型的土壤中找到和提取植物可用的硅 (Si) 部分。土壤反应 (pH)、温度和植物吸收是影响其从土壤中提取的 Si 有效性的一些主要决定因素。在这个实验中，从农田中收集了中性、酸性和碱性土壤以及植物样品（整株水稻）。按照现有程序处理植物样品。将土壤风干、研磨并通过 2 毫米孔径的筛子。四个级别的振动时间（0、5、10 和 20 分钟，表示为 S ₀、S ₅、S ₁₀和 S ₂₀，分别）@ 120rpm（每分钟转一圈）和四个温度等级（室温或 25°C、60°C、80°C 和 100°C；表示为 T ₀、T ₆₀、T ₈₀和 T ₁₀₀，分别）用于从土壤 - 水（1:10 比例）悬浮液中制备等分试样。酸性和碱性土壤比中性土壤具有更高的可提取硅。振荡时间和温度的综合作用释放出比对照更高的Si值，其中从S ₂₀ T ₁₀₀处理中提取的Si与水稻中的Si含量显着相关，并且对所有土壤都有更好的结果。