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粤桂甘蔗产区不同类型土壤pH值及其酸性改良数学方程
陈菁,曾辉
0
(中国热带农业科学院南亚热带作物研究所)
摘要:
采集粤桂甘蔗主要产区不同类型土壤,测其pH值,并测定调节土壤pH值至5.5、6.0、6.5需要碳酸钙和白云石粉用量,并以要调至土壤pH值减去原值数值为自变量(X),需要碳酸钙为因变量(Y,单位为千克/亩),进行数学模拟,得出不同类型土壤酸性改良数学方程,为不同土壤类型酸性土壤改良提供依据。结果如下:1、粤桂甘蔗产区土壤pH值在3.72-5.50,调节至土壤pH值5.5、6.0、6.5需要施用碳酸钙或白云石粉量因土壤类型而存在较大差异,以玄武岩类型需要量最少;2、不同类型土壤酸性土改良与碳酸钙用量数学方程及相关系数分别为:第四世纪红土:Y=225.9X-106.65,相关系数R=1;浅海沉积物发育而成土壤:Y=226.13X-48.007,相关系数R=0.9996;玄武岩发育而成土壤:Y=182.84X-69.464,相关系数R=0.9905,其中X为需要调节至土壤目标pH值减去调节前土壤pH值差值,Y为需要施用碳酸钙量(单位为千克/亩)。
关键词:  粤桂甘蔗产区  不同类型土壤  pH值  酸性改良  数学方程
DOI:
投稿时间:2020-07-21修订日期:2020-07-21
基金项目:国家重点研发计划项目 (2018YFD0201100)。
The pH value of different types of soil in sugarcane producing areas of Guangdong and Guangxi and its mathematical equation of acid improvement
()
Abstract:
The pH values of different types of soils in the main sugarcane producing areas of Guangdong and Guangxi were measured. The amount of calcium carbonate and dolomite powder needed to adjust the pH value of soil to 5.5, 6.0 and 6.5 was measured, and the value which is original value subtracted from the adjusted pH value as the independent variable (x), and the application amount calcium carbonate as the dependent variable (y, unit: kg/mu), and the mathematical simulation was carried out to obtain the mathematical equation of acid improvement of different types of soil, which provides the basis for the improvement of acid soil of different soil types. The results are as follows: 1. The pH value of the soil in the sugarcane producing area of Guangdong and Guangxi is 3.72-5.50, and the amount of calcium carbonate or dolomite powder needed to be applied to adjust to the pH value of the soil (which is 5.5, 6.0 and 6.5) is greatly different due to the soil type,and the basalt soil requires the least amount of them; 2. The mathematical equation and correlation coefficient of the acid soil improvement are respectively: Red Soil in the fourth century: y = 225.9x-106.65, correlation coefficient r = 1; shallow sea sediment occurrence Cultivated soil: y = 226.13x-48.007, r = 0.9996; basalt developed soil: y = 182.84x-69.464, r = 0.9905, Where x is the difference value between the target pH value to be adjusted minus the pH value of the soil before adjustment, y is the amount of calcium carbonate to be applied (unit: kg / mu).
Key words:  Main sugarcane producing area  Different types of soil  The pH value of soil  Acid soil improvement  Mathematical equation.

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