Calibration of soil and plant silicon analysis for rice production

Document Type

Article

Publication Date

1-1-2001

Abstract

Calibration of field crop response to nutrient availability is the bases for making a fertilizer recommendation from soil and tissue analyses. The purpose of this study was to evaluate and summarize results from a series of experiments on silicon (Si) fertilization of rice in the Everglades Agriculture Area. Twenty-eight rice field experiments were conducted from 1992 through 1996. The experiments consisted of 2 to 5 rates of calcium silicate applied to soils (Histosols) of varying Si soil-test values. Soil samples were taken before planting and analyzed for acetic acid (0.5mol L-1) extractable Si. Straw samples were collected at harvest and analyzed for total Si. Grain yield was determined. The "critical" levels for Si in the soil (point below which response to Si fertilizer is expected) calculated by the Cate & Nelson procedure was 19 mg Si L-1 soil. The amount of silicon to correct Si deficiency in the soil and to obtain optimum rice yield was 1500, 1120 and 0 kg ha-1 for low (<6 mg L-1), medium (6 to 24 mg L-1), and high (>24 mg L-1) level of soil Si, respectively. Silicon in the straw was classified as high when Si concentration was >34 g kg-1, medium when in between 17 and 34, and low when <17 g kg-1 (3.4 and 1.7%, respectively).

Publication Source (Journal or Book title)

Journal of Plant Nutrition

First Page

1071

Last Page

1084

This document is currently not available here.

Share

COinS