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广东徐闻县经济收入主要靠甘蔗,而该县甘蔗绝大部分分布在砖红壤地区。为了解该县砖红壤蔗区的养分状况,以便因土施肥,特作如下分析。一、材料与方法本文所用分析样本除全磷、全钾为徐闻县第二次土壤普查剖面样外,其它均为农化样。化学分析项目:酸碱度采用电位法;有机质采用重铬酸钾法;全氮采用凯氏法;碱解氮采用扩
Xuwen County, Guangdong’s economic income mainly depends on sugar cane, while most of the county’s sugar cane distributed in the brick red soil area. In order to understand the county’s brick red soil sugarcane nutrient status, so that due to soil fertilization, especially for the following analysis. First, materials and methods In this paper, the analysis of samples used in addition to total phosphorus, potassium is Xuwen County, the second soil census section profile, the other are agro-like. Chemical analysis project: pH using potentiometric method; organic matter using potassium dichromate method; total nitrogen by Kjeldahl; alkaline hydrolysis of nitrogen by expanding