广东省4地高产水田土壤物理特征研究  

Study on Soil Physical Characteristics of 4 High Yield Paddy Fields in Guangdong Province

作　　者：闫林源 徐若怡 李嘉寅 姚思彤 张晖 陈平[1] 蔡宝昌 YAN Lin-yuan;XU Ruo-yi;LI Jia-yin(Zhongkai College of Agricultural Engineering,Guangzhou,Guangdong 510225)

机构地区：[1]仲恺农业工程学院,广东广州510225 [2]广东省土地开发整治中心,广东广州510055

出　　处：《安徽农业科学》2023年第6期61-65,72,共6页Journal of Anhui Agricultural Sciences

基　　金：广东省自然资源厅科技项目(GDZRZYKJ2021003)。

摘　　要：为更好地服务于广东省垦造水田建设需要,对采集于广东省内水田占比较大的博罗县、惠东县、仁化县以及英德市4地高产水田的耕作层、犁底层样品,进行土壤物理指标检测和方差分析、MATLAB拟合VG模型参数,探究其土壤物理特征。结果表明,4处样地耕作层、犁底层的饱和含水量、容重和总孔隙度均值分别为40.50%、25.17%,1.24 g/cm^(3)、1.57 g/cm^(3)和51.79%、39.04%。耕作层容重与砂粒含量呈极显著正相关,与粉粒、黏粒含量显著负相关,犁底层则与砂粒含量正相关但不显著,而与粉粒含量呈显著负相关。VG模型参数n值、黏粒含量均值为犁底层(1.333、9.01%)>耕作层(1.274、5.14%),n值随黏粒含量的增加而变大。In order to better serve the construction needs of reclaiming paddy fields in Guangdong Province.The soil physical index detection and variance analysis were carried out for the samples of plough layer and plow bottom collected from four high-yield paddy fields in Boluo County,Huidong County,Renhua County and Yingde City in Guangdong Province.MATLAB fitted the parameters of the VG model to explore its soil physical characteristics.The results showed that the average values of saturated water content,bulk density and total porosity of the plough layer and plow bottom layer of the four plots were 40.50%,25.17%;1.24 g/cm^(3),1.57 g/cm^(3);51.79%,39.04%,respectively.The bulk density of the tillage layer has a very significant positive correlation with the sand content,and a significant negative correlation with the silt and clay content.The mean values of the VG model parameter n and clay content were the plow layer(1.333,9.01%)>the tillage layer(1.274,5.14%),and the n increased with the increase of the clay content.

关 键 词：高产水田 土壤物理特征 水分特征曲线 

分 类 号：S152[农业科学—土壤学]