Determination of Critical Soil Silicon Levels for Rice Production in Louisiana Using Different Extraction Procedures. Issue 17 (25th September 2018)

• Record Type: Journal Article
• Authors: Paye, Wooiklee; Tubana, Brenda; Harrell, Dustin; Babu, Tapasya; Kanke, Yumiko; Datnoff, Lawrence
• Is Part Of: Communications in soil science and plant analysis. Volume 49:Issue 17(2018)
• Page Start: 2091
• Page End: 2102
• Publication Date: 2018-09-25
• Subjects: Critical levels -- plant-available -- rice -- silicate slag -- silicon; Soil science -- Periodicals; Plants -- Chemical analysis -- Periodicals; Agricultural chemistry -- Periodicals; 631.405
• DOI: 10.1080/00103624.2018.1495731
• Languages: English
• ISSNs: 0010-3624

Abstract

ABSTRACT: While silicon (Si) fertilization is widely practiced in rice production, establishing critical soil Si levels has remained understudied. Field trials were established at 12 sites across Louisiana from 2013 to 2015 to determine critical soil Si for rice cultivation. Five silica slag (14% Si) rates at 0, 1, 2, 4, 6, and 8 Mg ha −1 and two lime rates (2 and 4 Mg ha −1 ) were arranged in randomized complete block design with four replications. Post harvest soil samples were analyzed for Si using seven extraction procedures. The critical soil Si levels established by the linear plateau model using 0.5 M acetic acid-1 hr (OAc-1) extraction procedure were 36, 41 and 50 mg kg −1 for plant Si uptake, grain yield, and relative yield as response variables, respectively. Generally, soils having high initial Si and pH had minimal responses to Si fertilization, whereas Si content of soils with low initial Si was significantly increased.