摘要
本研究在橡胶间作益智胶园与橡胶单作胶园内各建立1块30 m×70 m样地,进行表层土壤(0~10 cm)网格取样测定,并利用经典统计学与地统计学方法对土壤含水量的空间异质性进行了分析。结果表明:间作益智胶园土壤含水量显著高于橡胶单作胶园,且两者土壤含水量均属弱变异性;间作益智胶园样地的空间变异格局呈明显的阶梯状且连续性较好,空间变异大,而橡胶单作胶园样地则呈现为大图斑分布,碎片化图斑较少,空间聚群少,空间变异小;间作益智胶园样地块金效应值大于橡胶单作胶园样地,且表现为中等程度的空间自相关,这是由随机性和结构性因素共同作用的结果,说明间作是削弱自然因素引起的土壤水分空间变异性的重要因素;间作益智胶园样地和橡胶单作胶园样地在95%置信水平与相对均值允许误差5%条件下的合理采样数量分别为23、14个。
Soil samples were collected from the two rubber plantation plots(30 m×70 m)in Yizhi(Alpinia oxyphylla Miq)-rubber intercropping plantation and monoculture rubber plantation by grid sampling method(2 m×2 m),and the spatial heterogeneity of the soil pH and water content was analyzed by the methods of classical statistics and geo-statistic.The results showed that the soil water content of Yizhi-rubber intercropping plantation was significantly higher than that of monoculture rubber plantation,and the soil water content exhibited moderate variability in two plots.The spatial variation pattern of Yizhi-rubber intercropping plantation plots showed obvious ladder shape and good continuity,with large spatial variation,while the monoculture rubber plantation plots showed large pattern distribution,less fragmentation pattern,less spatial clustering,and small spatial variation.The nugget effect value of the intercropping plots was higher than that of the monocropping plots,and the spatial autocorrelation was moderate,which was the result of the combined action of randomness and structural factors,indicating that the intercropping is an important factor to weaken the spatial variability of soil moisture caused by natural factors.Under the 95%confidence level and 5%permissible error of relative mean,the reasonable number of samples of intercropping and monocropping rubber plantations were 23 and 14,respectively.
作者
吴炳孙
冯家东
王晶晶
王桂花
WU Bingsun;WANG Jingjing;WU Wenguan;FENG Jiadong(Opening Project Fund of Key Laboratory of Rubber Biology and Genetic Resource Utilization,Ministry of Agriculture/State Key Laboratory Breeding Base of Cultivation&Physiology for Tropical Crops/Danzhou Investigation&Experiment Station of Tropical Crops,Ministry of Agriculture,Danzhou,Hainan 571737;Institute of Forestry,Hainan University,Haikou,Hainan 570228;Rubber Research Institute,Catas,Haikou,Hainan 571101)
出处
《热带农业工程》
2022年第1期1-6,共6页
Tropical Agricultural Engineering
基金
中国热带农业科学院橡胶研究所开放课题(No.RRI-KLOF201804)
中国热带农业科学院基本科研业务费专项基金(No.1630022017008)
海南省自然科学基金高层次人才项目(No.320RC486)
海南大学科研启动基金项目(No.KYQD(ZR)1964)。
关键词
橡胶间作
土壤水分
空间变异
rubber intercropping
soil water
spatial variability
