枣麦间作农田土壤养分空间分布特性研究

Study on Spatial Distribution Characteristics of the Soil Nutrient in Jujube-Wheat Intercropping System

【目的】研究泽普县枣麦间作小尺度土壤养分空间变异,提高田间采集信息的效率,为果农间作合理施肥及农业可持续发展提供科学依据。【方法】利用地统计学软件GS+,对枣麦间作0~20、20~40、40~60cm土壤中的速效氮、速效磷、有机质进行空间分布特性分析。【结果】(1)速效氮、速效磷、有机质均表现为表层含量最高,中层与底层含量相当。(2)枣麦间作土壤速效氮、速效磷、有机质均属中等变异水平,各层速效氮、速效磷具有强烈的空间相关性;而有机质0~20 cm具有很强的空间相关性,20~40 cm空间相关性中等,40~60 cm空间相关性很弱。(3)各层速效氮、速效磷、有机质含量最高值并非都分布在枣树附近,有的偏离枣树位置,各养分含量高低随着与枣树距离的增大相间分布。【结论】枣麦间作系统土壤速效氮、速效磷、有机质含量分布存在异质性。

【Objective】To study jujube- wheat intercropping on small scale spatial variability of soil nutrient in Zepu County and improve the efficiency of the field gathering information in order to provide a scientific basis for reasonable fertilization and agricultural sustainable development. 【Method】Statistical software GS+was used to analyze the spatial distribution characteristics of the jujube- wheat intercropping at 0 ~ 20 cm,20 ~ 40 cm,40 ~ 60 cm of soil available nitrogen,available phosphorus and organic matter. 【Result】Firstly,soil available nitrogen,available phosphorus,organic matter on 0 ~ 20 cm were higher than other layers. Those on 20 ~ 40 cm and 40 ~ 60 cm layers are more or less. Secondly,available nitrogen,available phosphorus,organic matter were medium level variation on jujube- wheat intercropping,available nitrogen,available phosphorus had strong spatial correlation at 0 ~ 60 cm. But organic matter had a strong spatial correlation at 0 ~ 20 cm,a medium spatial correlation at 20 ~ 40 cm,a very weak spatial correlation at 40 ~ 60 cm.Thirdly,the highest content of available nitrogen,available phosphorus,organic matter on each layer did not distribute near the jujube completely,and some deviated the jujube. Each nutrient content distribution varied as the distance to jujube increased.【Conclusion】The distribution heterogeneity of soil available nitrogen,available phosphorus and organic matter content existed in jujube- wheat intercropping system.